CN112964598A - Method and device for continuously measuring density and organic carbon content of formation cuttings - Google Patents
Method and device for continuously measuring density and organic carbon content of formation cuttings Download PDFInfo
- Publication number
- CN112964598A CN112964598A CN202110198992.3A CN202110198992A CN112964598A CN 112964598 A CN112964598 A CN 112964598A CN 202110198992 A CN202110198992 A CN 202110198992A CN 112964598 A CN112964598 A CN 112964598A
- Authority
- CN
- China
- Prior art keywords
- sample
- reference chamber
- volume
- drilling
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 113
- 238000005520 cutting process Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 19
- 239000011435 rock Substances 0.000 claims abstract description 285
- 238000005553 drilling Methods 0.000 claims abstract description 211
- 239000012634 fragment Substances 0.000 claims abstract description 119
- 238000005259 measurement Methods 0.000 claims description 22
- 230000006835 compression Effects 0.000 claims description 20
- 238000007906 compression Methods 0.000 claims description 20
- 238000012360 testing method Methods 0.000 claims description 20
- 101100356682 Caenorhabditis elegans rho-1 gene Proteins 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000000691 measurement method Methods 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 67
- 238000013461 design Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004058 oil shale Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
- G01N2009/022—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of solids
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the technical field of oil and gas exploration, in particular to a method and a device for continuously measuring the density and the organic carbon content of formation cuttings. Sequentially acquiring drilling rock debris samples at intervals along a drilling path of a target rock interval; measuring the drilling rock debris samples to obtain the sample density of each drilling rock debris sample, and the average residual rock debris skeleton density and the average organic carbon skeleton density of the target rock interval; respectively calculating the organic carbon content of each drilling rock fragment sample according to the average residual rock fragment skeleton density, the average organic carbon skeleton density and the sample density of each drilling rock fragment sample; and sequentially arranging the organic carbon content of each drilling rock fragment sample according to the acquisition sequence of the corresponding drilling rock fragment samples, and introducing the organic carbon content into a curve chart to obtain an organic carbon content curve chart of the target rock interval. The method can simply and efficiently measure the continuous organic carbon content of the target rock interval, and saves manpower and material resources.
Description
Technical Field
The invention relates to the technical field of oil and gas exploration, in particular to a method and a device for continuously measuring the density and the organic carbon content of formation cuttings.
Background
In unconventional oil and gas exploration such as shale gas, the determination of organic carbon content (TOC) is very important for reservoir evaluation and optimization of later completion measures. Organic carbon refers to carbon contained in sedimentary rock in relation to organic matter, and organic carbon content (TOC) refers to the mass of organic carbon per unit weight of rock, expressed as a percentage. The organic carbon content is a simple and effective method for evaluating the abundance of organic matters, and is also the most main index for evaluating the abundance of organic matters in the oil shale.
At present, a horizontal well is usually adopted in oil and gas development, full-series well logging and coring are rarely carried out, organic carbon content (TOC) cannot be obtained through a conventional method, further, later-stage perforation, fracturing and production modes cannot be optimized, shale gas well coring is few, the period for carrying out organic carbon content (TOC) analysis on a rock core in a laboratory is long, rock core analysis is single-point measurement, the continuous change rule of stratum organic carbon content (TOC) parameters cannot be obtained, and a quick and simple mode for obtaining stratum continuous organic carbon content (TOC) is urgently needed in the field of oil and gas exploration.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method and a device for continuously measuring the density and the organic carbon content of the formation rock debris, which can be used for simply and efficiently measuring the continuous organic carbon content of a target rock interval and greatly using manpower and material resources.
In a first aspect, the invention provides a method for continuously measuring the density and organic carbon content of formation cuttings, which comprises the following steps:
sequentially obtaining drilling rock debris samples at intervals along a drilling path of a target rock layer section;
drying each drilling rock debris sample, and respectively measuring the mass and the volume of the drilling rock debris sample;
burning a plurality of selected drilling debris samples to remove organic carbon components of the drilling debris samples to obtain residual debris;
measuring the mass and volume of the residual rock debris;
calculating and obtaining the residual rock fragment framework density and the organic carbon framework density of each selected drilling rock fragment sample according to the mass and the volume of each selected drilling rock fragment sample and the mass and the volume of the residual rock fragment thereof;
respectively taking the average value of the skeleton density of each residual rock fragment and the average value of the organic carbon skeleton density to obtain the average residual rock fragment skeleton density and the average organic carbon skeleton density of the target rock interval;
respectively calculating the sample density of each drilling rock debris sample according to the mass and the volume of each drilling rock debris sample;
respectively calculating the organic carbon content of each drilling rock fragment sample according to the average residual rock fragment skeleton density, the average organic carbon skeleton density and the sample density of each drilling rock fragment sample;
and sequentially arranging the organic carbon content of each drilling rock fragment sample according to the acquisition sequence of the corresponding drilling rock fragment samples, and introducing the organic carbon content into a curve chart to obtain an organic carbon content curve chart of the target rock interval.
Based on the content of the invention, the residual rock fragment skeleton density and the organic carbon skeleton density of each selected drilling rock fragment sample are calculated and obtained by measuring the mass and the volume of a plurality of selected drilling rock fragment samples and the mass and the volume of the residual rock fragments thereof, and respectively taking the average values to obtain the average residual rock debris skeleton density and the average organic carbon skeleton density of the target rock interval, then based on the average residual rock fragment skeleton density and the average organic carbon skeleton density of the target rock interval, and measuring the mass and volume of each drilling rock fragment sample to respectively calculate and obtain the organic carbon content of each drilling rock fragment sample, then sequentially arranging the organic carbon content of each drilling rock fragment sample according to the interval acquisition sequence of the corresponding drilling rock fragment samples, and introducing a curve chart to obtain an organic carbon content curve chart of the target rock interval so as to represent the linear change of the continuous organic carbon content of the target rock interval. By the method, the continuous organic carbon content of the target rock stratum can be simply and efficiently measured, a large amount of manpower and material resources are saved, and only a plurality of selected drilling rock debris samples need to be burned to measure the average residual rock debris framework density and the average organic carbon framework density of the target rock stratum, so that the organic carbon content measurement efficiency of all drilling rock debris samples is improved.
In one possible design, the process of measuring the volume of the drilling cuttings sample or residual cuttings comprises:
placing the measuring container into a sample chamber with a set volume, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber with a set volume and normal pressure, closing the reference chamber, and measuring a first air pressure of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a second pressure of the reference chamber;
calculating the volume of the measuring container according to the volume of the sample chamber, the volume of the reference chamber, the first air pressure of the reference chamber and the second air pressure of the reference chamber;
filling a drilling rock debris sample or residual rock debris into a measuring container, then putting the measuring container into a sample chamber, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber at normal pressure, closing the reference chamber, and measuring a third air pressure of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a fourth pressure of the reference chamber;
and calculating the volume of the drilling debris sample or the residual debris according to the volume of the sample chamber, the volume of the reference chamber, the volume of the measuring container, the third air pressure of the reference chamber and the fourth air pressure of the reference chamber.
In one possible design, setting the volume of the sample chamber as Vy, the volume of the reference chamber as Vc, the first pressure of the reference chamber as P1, the second pressure of the reference chamber as P2, and the volume of the measurement container as Vr, the volume of the measurement container Vr can be calculated from the formula Vc P1 ═ (Vy-Vr + Vc) × P2; setting the third gas pressure of the reference chamber to be P3, the fourth gas pressure of the reference chamber to be P4, and the volume of the drilling debris sample or residual debris to be Vs, the volume of the drilling debris sample or residual debris Vs can be calculated by the formula Vc P3 ═ v-Vr-Vs + Vc) × P4.
In one possible design, the process of measuring the volume of the drilling cuttings sample or residual cuttings comprises:
placing the measuring container into a sample chamber with a set volume, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber with a set volume and normal pressure, closing the reference chamber, and measuring a first air pressure of the reference chamber and a first room temperature of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a second pressure of the reference chamber and a second room temperature of the reference chamber;
calculating the volume of the measuring container according to the volume of the sample chamber, the volume of the reference chamber, the first room temperature of the reference chamber, the second room temperature of the reference chamber, the first air pressure of the reference chamber and the second air pressure of the reference chamber;
filling a drilling rock debris sample or residual rock debris into a measuring container, then putting the measuring container into a sample chamber, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber at normal pressure, closing the reference chamber, and measuring a third air pressure of the reference chamber and a third room temperature of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a fourth pressure of the reference chamber and a fourth room temperature of the reference chamber;
and calculating the volume of the drilling rock fragment sample or the residual rock fragment according to the volume of the sample chamber, the volume of the reference chamber, the volume of the measuring container, the third room temperature of the reference chamber, the fourth room temperature of the reference chamber, the third air pressure of the reference chamber and the fourth air pressure of the reference chamber.
In one possible design, setting the volume of the sample chamber as Vy, the volume of the reference chamber as Vc, the first pressure of the reference chamber as P1, the first room temperature of the reference chamber as T1, the second pressure of the reference chamber as P2, the second room temperature of the reference chamber as T2, and the volume of the measurement container as Vr, the volume of the measurement container Vr can be calculated by the formula Vc P1/(T1Z 1) ═ v (Vy-Vr + Vc) P2/(T2Z 2), where Z1 is the gas compression factor under the conditions of the first room temperature T1 of the reference chamber and the first pressure P1 of the reference chamber, and Z2 is the gas compression factor under the conditions of the second room temperature T2 of the reference chamber and the second pressure P2 of the reference chamber; setting the third pressure of the reference chamber to be P3, the third room temperature of the reference chamber to be T3, the fourth pressure of the reference chamber to be P4, the fourth room temperature of the reference chamber to be T4, and the volume of the drilling debris sample or residual rock debris to be Vs, the volume of the drilling debris sample or residual rock debris Vs can be calculated by the formula Vc P3/(T3Z 3) (Vy-Vr-Vs + Vc) P4/(T4Z 4), wherein Z3 is the gas compression factor under the conditions of the third room temperature T3 of the reference chamber and the third pressure P3 of the reference chamber, and Z4 is the gas compression factor under the conditions of the fourth room temperature T4 of the reference chamber and the fourth pressure P4 of the reference chamber.
In one possible design, the mass of the drill cuttings sample is set to M1, the mass of the residual cuttings is set to M2, the volume of the drill cuttings sample is V1, the volume of the residual cuttings is V2, the density of the residual cuttings skeleton is ρ 1, and the density of the organic carbon skeleton is ρ 2, then ρ 1 ═ M2/V2, ρ 2 ═ M1-M2)/(V1-V2, the average density of the residual cuttings skeleton is set to ρ 1 ', the average density of the organic carbon skeleton is ρ 2', the mass of the ith drill cuttings sample obtained is Mi, the volume is Vi, the sample density of the ith drill cuttings sample is set to ρ i, and ρ i ═ Mi/Vi, the organic carbon content of the ith drill cuttings sample is set to VtociThen V istoci＝(ρi-ρ1’)/(ρ2’-ρ1’)*Vi。
In a second aspect, the present invention further provides a method for continuously measuring the density and organic carbon content of formation cuttings, comprising:
sequentially obtaining drilling rock debris samples at intervals along a drilling path of a target rock layer section;
drying each drilling rock debris sample, and respectively measuring the mass and the volume;
burning each drilling rock debris sample to remove organic carbon components of the drilling rock debris sample to obtain residual rock debris;
measuring the mass and volume of the residual rock debris;
calculating the sample density, the residual rock fragment skeleton density and the organic carbon skeleton density of each drilling rock fragment sample according to the mass and the volume of each drilling rock fragment sample and the mass and the volume of the residual rock fragments of each drilling rock fragment sample;
respectively calculating the organic carbon content of each drilling rock fragment sample according to the sample density, the residual rock fragment skeleton density and the organic carbon skeleton density of each drilling rock fragment sample;
and sequentially arranging the organic carbon content of each drilling rock fragment sample according to the acquisition sequence of the corresponding drilling rock fragment samples, and introducing the organic carbon content into a curve chart to obtain an organic carbon content curve chart of the target rock interval.
Based on the content of the invention, the mass and the volume of each drilling rock fragment sample and the mass and the volume of the residual rock fragments are obtained through measurement, the sample density, the residual rock fragment skeleton density and the organic carbon skeleton density of each drilling rock fragment sample are obtained through calculation, then the organic carbon content of each drilling rock fragment sample can be obtained through calculation according to the sample density, the residual rock fragment skeleton density and the organic carbon skeleton density of each drilling rock fragment sample, the organic carbon content of each drilling rock fragment sample is sequentially arranged according to the obtaining sequence of the corresponding drilling rock fragment samples, and a curve chart is introduced to obtain an organic carbon content curve chart of a target rock interval so as to represent the continuous organic carbon content linear change of the target rock interval. By the method, the continuous organic carbon content of the target rock stratum section can be simply and efficiently measured, a large amount of manpower and material resources are saved, and the accuracy of measuring the organic carbon content of all drilling rock debris samples is improved by measuring and calculating the sample density, the residual rock debris skeleton density and the organic carbon skeleton density of each drilling rock debris sample.
In one possible design, the process of measuring the volume of the drilling cuttings sample or residual cuttings comprises:
placing the measuring container into a sample chamber with a set volume, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber with a set volume and normal pressure, closing the reference chamber, and measuring a first air pressure of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a second pressure of the reference chamber;
calculating the volume of the measuring container according to the volume of the sample chamber, the volume of the reference chamber, the first air pressure of the reference chamber and the second air pressure of the reference chamber;
filling a drilling rock debris sample or residual rock debris into a measuring container, then putting the measuring container into a sample chamber, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber at normal pressure, closing the reference chamber, and measuring a third air pressure of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a fourth pressure of the reference chamber;
and calculating the volume of the drilling debris sample or the residual debris according to the volume of the sample chamber, the volume of the reference chamber, the volume of the measuring container, the third air pressure of the reference chamber and the fourth air pressure of the reference chamber.
In one possible design, setting the volume of the sample chamber as Vy, the volume of the reference chamber as Vc, the first pressure of the reference chamber as P1, the second pressure of the reference chamber as P2, and the volume of the measurement container as Vr, the volume of the measurement container Vr can be calculated from the formula Vc P1 ═ (Vy-Vr + Vc) × P2; setting the third gas pressure of the reference chamber to be P3, the fourth gas pressure of the reference chamber to be P4, and the volume of the drilling debris sample or residual debris to be Vs, the volume of the drilling debris sample or residual debris Vs can be calculated by the formula Vc P3 ═ v-Vr-Vs + Vc) × P4.
In one possible design, the process of measuring the volume of the drilling cuttings sample or residual cuttings comprises:
placing the measuring container into a sample chamber with a set volume, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber with a set volume and normal pressure, closing the reference chamber, and measuring a first air pressure of the reference chamber and a first room temperature of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a second pressure of the reference chamber and a second room temperature of the reference chamber;
calculating the volume of the measuring container according to the volume of the sample chamber, the volume of the reference chamber, the first room temperature of the reference chamber, the second room temperature of the reference chamber, the first air pressure of the reference chamber and the second air pressure of the reference chamber;
filling a drilling rock debris sample or residual rock debris into a measuring container, then putting the measuring container into a sample chamber, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber at normal pressure, closing the reference chamber, and measuring a third air pressure of the reference chamber and a third room temperature of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a fourth pressure of the reference chamber and a fourth room temperature of the reference chamber;
and calculating the volume of the drilling rock fragment sample or the residual rock fragment according to the volume of the sample chamber, the volume of the reference chamber, the volume of the measuring container, the third room temperature of the reference chamber, the fourth room temperature of the reference chamber, the third air pressure of the reference chamber and the fourth air pressure of the reference chamber.
In one possible design, setting the volume of the sample chamber as Vy, the volume of the reference chamber as Vc, the first pressure of the reference chamber as P1, the first room temperature of the reference chamber as T1, the second pressure of the reference chamber as P2, the second room temperature of the reference chamber as T2, and the volume of the measurement container as Vr, the volume of the measurement container Vr can be calculated by the formula Vc P1/(T1Z 1) ═ v (Vy-Vr + Vc) P2/(T2Z 2), where Z1 is the gas compression factor under the conditions of the first room temperature T1 of the reference chamber and the first pressure P1 of the reference chamber, and Z2 is the gas compression factor under the conditions of the second room temperature T2 of the reference chamber and the second pressure P2 of the reference chamber; setting the third pressure of the reference chamber to be P3, the third room temperature of the reference chamber to be T3, the fourth pressure of the reference chamber to be P4, the fourth room temperature of the reference chamber to be T4, and the volume of the drilling debris sample or residual rock debris to be Vs, the volume of the drilling debris sample or residual rock debris Vs can be calculated by the formula Vc P3/(T3Z 3) (Vy-Vr-Vs + Vc) P4/(T4Z 4), wherein Z3 is the gas compression factor under the conditions of the third room temperature T3 of the reference chamber and the third pressure P3 of the reference chamber, and Z4 is the gas compression factor under the conditions of the fourth room temperature T4 of the reference chamber and the fourth pressure P4 of the reference chamber.
In one possible design, the mass of the drilling debris sample is set to be M1, the mass of the residual debris is set to be M2, the volume of the drilling debris sample is set to be V1, the volume of the residual debris is set to be V2, the density of a residual debris skeleton is set to be rho 1, the density of an organic carbon skeleton is set to be rho 2, the sample density of the drilling debris sample is rho y, and the organic carbon content of the drilling debris sample is set to be VtocThen ρ 1 ═ M2/V2, ρ 2 ═ M1-M2)/(V1-V2), ρ y ═ M1/V1, Vtoc＝(ρy-ρ1)/(ρ2-ρ1)*V1。
In a third aspect, the invention provides a continuous measurement device for density and organic carbon content of formation cuttings, which comprises a sample chamber, a reference chamber, a gas transmission bottle and a pressure gauge, wherein the reference chamber is respectively connected with the sample chamber, the gas transmission bottle and the pressure gauge through pipelines, the sample chamber is communicated with the external environment through a pipeline, a pressure reducing valve and a first control valve are arranged on the pipeline between the gas transmission bottle and the reference chamber, a second control valve is arranged on the pipeline between the sample chamber and the reference chamber, and a third control valve is arranged on the pipeline between the sample chamber and the external environment.
In one possible design, the first control valve, the second control valve and the third control valve are all solenoid valves, the pressure gauge is a digital pressure gauge, and the first control valve, the second control valve, the third control valve and the pressure gauge are all electrically connected with an external equipment control and display system.
The invention has the beneficial effects that:
the method comprises the steps of obtaining the drilling rock debris samples of the target rock stratum section at intervals in sequence to measure the mass and the volume before and after removing the organic carbon components respectively so as to calculate and obtain the organic carbon content of each drilling rock debris sample, sequentially arranging the organic carbon content of each drilling rock debris sample according to the obtaining sequence of the corresponding drilling rock debris sample, and introducing the organic carbon content into a curve chart, so that an organic carbon content curve graph of the target rock stratum section can be obtained, and the continuous organic carbon content linear change of the target rock stratum section can be represented. By the method, the continuous organic carbon content of the target rock interval can be simply and efficiently measured, and a large amount of manpower and material resources are saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow diagram of a first method of the present invention;
FIG. 2 is a schematic flow chart of a second method of the present invention;
FIG. 3 is a schematic structural diagram of the apparatus of the present invention.
In the figure: 1. a sample chamber; 2. a reference chamber; 3. a gas delivery bottle; 4. a pressure reducing valve; 5. a first control valve; 6. a second control valve; 7. a third control valve; 8. and a pressure gauge.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
It should be understood that the terms first, second, etc. are used merely for distinguishing between descriptions and are not intended to indicate or imply relative importance. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.
It is to be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside", and the like, refer to an orientation or positional relationship that is conventionally used for placing the product of the present invention, or that is conventionally understood by those skilled in the art, and are used merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present invention.
It will be understood that when an element is referred to as being "connected," "connected," or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between … …" versus "directly between … …", "adjacent" versus "directly adjacent", etc.).
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.
It should also be noted that, in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed substantially concurrently, or the figures may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
In the following description, specific details are provided to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, systems may be shown in block diagrams in order not to obscure the examples in unnecessary detail. In other instances, well-known processes, structures and techniques may be shown without unnecessary detail in order to avoid obscuring example embodiments.
Example 1:
the embodiment provides a method for continuously measuring the density and the organic carbon content of formation cuttings, as shown in fig. 1, which includes the following steps:
s101, sequentially obtaining drilling rock debris samples at intervals along a drilling path of a target rock stratum section;
when drilling rock debris samples are sequentially obtained along the drilling path of the target rock interval at intervals, the interval is set to be about 2 meters optimally, and in specific implementation, the interval can be set according to actual conditions.
S102, drying each drilling rock debris sample, and respectively measuring the mass and the volume of the drilling rock debris sample.
The drying temperature can be set at about 105 ℃ so as to ensure that the drilling rock debris sample can be fully dried and organic carbon components in the drilling rock debris sample cannot be consumed, and during specific implementation, the drying temperature can be set according to actual conditions.
S103, burning a plurality of selected drilling rock debris samples, and removing organic carbon components of the drilling rock debris samples to obtain residual rock debris.
The burning temperature can be set within the range of 350-400 ℃ to ensure that organic carbon components in the drilling debris sample are sufficiently removed, other components in the drilling debris sample are not consumed, and the burning temperature can be set according to actual conditions during specific implementation.
And S104, measuring the mass and the volume of the residual rock debris.
The measurement of the volume of both the drilling cuttings sample and its residual cuttings can be accomplished as follows:
placing the measuring container into a sample chamber with a set volume, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber with a set volume and normal pressure, closing the reference chamber, and measuring a first air pressure of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a second pressure of the reference chamber;
calculating the volume of the measuring container according to the volume of the sample chamber, the volume of the reference chamber, the first air pressure of the reference chamber and the second air pressure of the reference chamber;
filling a drilling rock debris sample or residual rock debris into a measuring container, then putting the measuring container into a sample chamber, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber at normal pressure, closing the reference chamber, and measuring a third air pressure of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a fourth pressure of the reference chamber;
and calculating the volume of the drilling debris sample or the residual debris according to the volume of the sample chamber, the volume of the reference chamber, the volume of the measuring container, the third air pressure of the reference chamber and the fourth air pressure of the reference chamber.
Setting the volume of the sample chamber as Vy, the volume of the reference chamber as Vc, the first air pressure of the reference chamber as P1, the second air pressure of the reference chamber as P2 and the volume of the measuring container as Vr, wherein the volume of the measuring container is obtained by calculating the formula Vc P1 as (Vy-Vr + Vc) P2; setting the third gas pressure of the reference chamber to be P3, the fourth gas pressure of the reference chamber to be P4, and the volume of the drilling debris sample or residual debris to be Vs, the volume of the drilling debris sample or residual debris Vs can be calculated by the formula Vc P3 ═ v-Vr-Vs + Vc) × P4.
The method utilizes the Boyle's law (namely, the product of the volume and the gas pressure of ideal gas is constant at a quantitative fixed temperature) to calculate and obtain the volumes of the drilling debris sample and the residual debris.
Or by the second way:
placing the measuring container into a sample chamber with a set volume, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber with a set volume and normal pressure, closing the reference chamber, and measuring a first air pressure of the reference chamber and a first room temperature of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a second pressure of the reference chamber and a second room temperature of the reference chamber;
calculating the volume of the measuring container according to the volume of the sample chamber, the volume of the reference chamber, the first room temperature of the reference chamber, the second room temperature of the reference chamber, the first air pressure of the reference chamber and the second air pressure of the reference chamber;
filling a drilling rock debris sample or residual rock debris into a measuring container, then putting the measuring container into a sample chamber, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber at normal pressure, closing the reference chamber, and measuring a third air pressure of the reference chamber and a third room temperature of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a fourth pressure of the reference chamber and a fourth room temperature of the reference chamber;
and calculating the volume of the drilling rock fragment sample or the residual rock fragment according to the volume of the sample chamber, the volume of the reference chamber, the volume of the measuring container, the third room temperature of the reference chamber, the fourth room temperature of the reference chamber, the third air pressure of the reference chamber and the fourth air pressure of the reference chamber.
Setting the volume of the sample chamber as Vy, the volume of the reference chamber as Vc, the first air pressure of the reference chamber as P1, the first room temperature of the reference chamber as T1, the second air pressure of the reference chamber as P2, the second room temperature of the reference chamber as T2 and the volume of the measuring container as Vr, wherein the volume of the measuring container is obtained by calculating a formula Vc P1/(T1Z 1) ═ P2/(T2Z 2), wherein Z1 is a gas compression factor under the conditions of the first room temperature T1 of the reference chamber and the first air pressure P1 of the reference chamber, and Z2 is a gas compression factor under the conditions of the second room temperature T2 of the reference chamber and the second air pressure P2 of the reference chamber; setting the third pressure of the reference chamber to be P3, the third room temperature of the reference chamber to be T3, the fourth pressure of the reference chamber to be P4, the fourth room temperature of the reference chamber to be T4, and the volume of the drilling debris sample or residual rock debris to be Vs, the volume of the drilling debris sample or residual rock debris Vs can be calculated by the formula Vc P3/(T3Z 3) (Vy-Vr-Vs + Vc) P4/(T4Z 4), wherein Z3 is the gas compression factor under the conditions of the third room temperature T3 of the reference chamber and the third pressure P3 of the reference chamber, and Z4 is the gas compression factor under the conditions of the fourth room temperature T4 of the reference chamber and the fourth pressure P4 of the reference chamber.
The method utilizes the Boyle's law (namely, the product of the volume and the air pressure of ideal gas is a constant at a fixed quantitative temperature) and fully considers the changes of non-ideal gas and temperature to expand and calculate to obtain the volumes of the drilling rock fragment sample and the residual rock fragments.
And S105, calculating and obtaining the residual rock fragment skeleton density and the organic carbon skeleton density of each selected drilling rock fragment sample according to the mass and the volume of each selected drilling rock fragment sample and the mass and the volume of the residual rock fragment thereof.
And setting the mass of the drilling debris sample to be M1, the mass of the residual rock debris to be M2, the volume of the drilling debris sample to be V1, the volume of the residual rock debris to be V2, the density of a residual rock debris skeleton to be rho 1 and the density of an organic carbon skeleton to be rho 2, wherein rho 1 is M2/V2, and rho 2 is (M1-M2)/(V1-V2).
And S106, respectively taking the average values of the skeleton density of each residual rock fragment and the organic carbon skeleton density to obtain the average residual rock fragment skeleton density and the average organic carbon skeleton density of the target rock interval.
And S107, respectively calculating the sample density of each drilling rock fragment sample according to the mass and the volume of each drilling rock fragment sample.
And S108, respectively calculating and obtaining the organic carbon content of each drilling rock fragment sample according to the average residual rock fragment skeleton density, the average organic carbon skeleton density and the sample density of each drilling rock fragment sample.
Setting average residual rock debris skeleton density as rho 1 ', average organic carbon skeleton density as rho 2', obtaining the ith drilling rock debris sample with the mass of Mi and the volume of Vi, setting the sample density of the ith drilling rock debris sample as rho i, setting rho i as Mi/Vi, setting the organic carbon content of the ith drilling rock debris sample as VtociThen V istoci＝(ρi-ρ1’)/(ρ2’-ρ1’)*Vi
S109, sequentially arranging the organic carbon content of each drilling rock fragment sample according to the acquisition sequence of the corresponding drilling rock fragment samples, and introducing the organic carbon content into a curve chart to obtain an organic carbon content curve chart of the target rock stratum section.
In the embodiment, the residual rock fragment framework density and the organic carbon framework density of each selected drilling rock fragment sample are calculated by measuring and obtaining the mass and the volume of a plurality of selected drilling rock fragment samples and the mass and the volume of the residual rock fragments thereof, and respectively taking the average values to obtain the average residual rock debris skeleton density and the average organic carbon skeleton density of the target rock interval, then based on the average residual rock fragment skeleton density and the average organic carbon skeleton density of the target rock interval, and measuring the mass and volume of each drilling rock fragment sample to respectively calculate and obtain the organic carbon content of each drilling rock fragment sample, then sequentially arranging the organic carbon content of each drilling rock fragment sample according to the acquisition sequence of the corresponding drilling rock fragment samples, and introducing a curve chart to obtain an organic carbon content curve chart of the target rock interval so as to represent the linear change of the continuous organic carbon content of the target rock interval. By the method, the continuous organic carbon content of the target rock stratum can be simply and efficiently measured, a large amount of manpower and material resources are saved, and only a plurality of selected drilling rock debris samples need to be burned to measure the average residual rock debris framework density and the average organic carbon framework density of the target rock stratum, so that the organic carbon content measurement efficiency of all drilling rock debris samples is improved.
Example 2:
the embodiment provides a method for continuously measuring the density and the organic carbon content of formation cuttings, as shown in fig. 2, which includes the following steps:
s201, drilling rock debris samples are sequentially obtained at intervals along a drilling path of a target rock interval.
When drilling rock debris samples are sequentially obtained along the drilling path of the target rock interval at intervals, the interval is set to be about 2 meters optimally, and in specific implementation, the interval can be set according to actual conditions.
S202, drying each drilling rock debris sample, and respectively measuring the mass and the volume.
The drying temperature can be set at about 105 ℃ so as to ensure that the drilling rock debris sample can be fully dried and organic carbon components in the drilling rock debris sample cannot be consumed, and during specific implementation, the drying temperature can be set according to actual conditions.
S203, burning each drilling rock debris sample, and removing organic carbon components of the drilling rock debris sample to obtain residual rock debris.
The burning temperature can be set within the range of 350-400 ℃ to ensure that organic carbon components in the drilling debris sample are sufficiently removed, other components in the drilling debris sample are not consumed, and the burning temperature can be set according to actual conditions during specific implementation.
And S204, measuring the mass and the volume of the residual rock debris.
The measurement of the volume of both the drilling cuttings sample and its residual cuttings can be accomplished as follows:
placing the measuring container into a sample chamber with a set volume, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber with a set volume and normal pressure, closing the reference chamber, and measuring a first air pressure of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a second pressure of the reference chamber;
calculating the volume of the measuring container according to the volume of the sample chamber, the volume of the reference chamber, the first air pressure of the reference chamber and the second air pressure of the reference chamber;
filling a drilling rock debris sample or residual rock debris into a measuring container, then putting the measuring container into a sample chamber, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber at normal pressure, closing the reference chamber, and measuring a third air pressure of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a fourth pressure of the reference chamber;
and calculating the volume of the drilling debris sample or the residual debris according to the volume of the sample chamber, the volume of the reference chamber, the volume of the measuring container, the third air pressure of the reference chamber and the fourth air pressure of the reference chamber.
Setting the volume of the sample chamber as Vy, the volume of the reference chamber as Vc, the first air pressure of the reference chamber as P1, the second air pressure of the reference chamber as P2 and the volume of the measuring container as Vr, wherein the volume of the measuring container is obtained by calculating the formula Vc P1 as (Vy-Vr + Vc) P2; setting the third gas pressure of the reference chamber to be P3, the fourth gas pressure of the reference chamber to be P4, and the volume of the drilling debris sample or residual debris to be Vs, the volume of the drilling debris sample or residual debris Vs can be calculated by the formula Vc P3 ═ v-Vr-Vs + Vc) × P4.
The method utilizes the Boyle's law (namely, the product of the volume and the gas pressure of ideal gas is constant at a quantitative fixed temperature) to calculate and obtain the volumes of the drilling debris sample and the residual debris.
Or by the second way:
placing the measuring container into a sample chamber with a set volume, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber with a set volume and normal pressure, closing the reference chamber, and measuring a first air pressure of the reference chamber and a first room temperature of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a second pressure of the reference chamber and a second room temperature of the reference chamber;
calculating the volume of the measuring container according to the volume of the sample chamber, the volume of the reference chamber, the first room temperature of the reference chamber, the second room temperature of the reference chamber, the first air pressure of the reference chamber and the second air pressure of the reference chamber;
filling a drilling rock debris sample or residual rock debris into a measuring container, then putting the measuring container into a sample chamber, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber at normal pressure, closing the reference chamber, and measuring a third air pressure of the reference chamber and a third room temperature of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a fourth pressure of the reference chamber and a fourth room temperature of the reference chamber;
and calculating the volume of the drilling rock fragment sample or the residual rock fragment according to the volume of the sample chamber, the volume of the reference chamber, the volume of the measuring container, the third room temperature of the reference chamber, the fourth room temperature of the reference chamber, the third air pressure of the reference chamber and the fourth air pressure of the reference chamber.
Setting the volume of the sample chamber as Vy, the volume of the reference chamber as Vc, the first air pressure of the reference chamber as P1, the first room temperature of the reference chamber as T1, the second air pressure of the reference chamber as P2, the second room temperature of the reference chamber as T2 and the volume of the measuring container as Vr, wherein the volume of the measuring container is obtained by calculating a formula Vc P1/(T1Z 1) ═ P2/(T2Z 2), wherein Z1 is a gas compression factor under the conditions of the first room temperature T1 of the reference chamber and the first air pressure P1 of the reference chamber, and Z2 is a gas compression factor under the conditions of the second room temperature T2 of the reference chamber and the second air pressure P2 of the reference chamber; setting the third pressure of the reference chamber to be P3, the third room temperature of the reference chamber to be T3, the fourth pressure of the reference chamber to be P4, the fourth room temperature of the reference chamber to be T4, and the volume of the drilling debris sample or residual rock debris to be Vs, the volume of the drilling debris sample or residual rock debris Vs can be calculated by the formula Vc P3/(T3Z 3) (Vy-Vr-Vs + Vc) P4/(T4Z 4), wherein Z3 is the gas compression factor under the conditions of the third room temperature T3 of the reference chamber and the third pressure P3 of the reference chamber, and Z4 is the gas compression factor under the conditions of the fourth room temperature T4 of the reference chamber and the fourth pressure P4 of the reference chamber.
The method utilizes the Boyle's law (namely, the product of the volume and the air pressure of ideal gas is a constant at a fixed quantitative temperature) and fully considers the changes of non-ideal gas and temperature to expand and calculate to obtain the volumes of the drilling rock fragment sample and the residual rock fragments.
And S205, calculating and obtaining the sample density, the residual rock fragment skeleton density and the organic carbon skeleton density of each drilling rock fragment sample according to the mass and the volume of each drilling rock fragment sample and the mass and the volume of the residual rock fragments.
Setting the mass of a drilling debris sample to be M1, the mass of residual rock debris to be M2, the volume of the drilling debris sample to be V1, the volume of the residual rock debris to be V2, the density of a residual rock debris skeleton to be rho 1, the density of an organic carbon skeleton to be rho 2 and the sample density of the drilling debris sample to be rho y, wherein rho 1 is M2/V2, rho 2 is (M1-M2)/(V1-V2) and rho y is M1/V1.
S206, respectively calculating and obtaining the organic carbon content of each drilling rock fragment sample according to the sample density, the residual rock fragment skeleton density and the organic carbon skeleton density of each drilling rock fragment sample.
Setting the organic carbon content of the drilling debris sample to be VtocThen V istoc＝(ρy-ρ1)/(ρ2-ρ1)*V1。
S207, sequentially arranging the organic carbon content of each drilling rock fragment sample according to the acquisition sequence of the corresponding drilling rock fragment samples, and introducing the organic carbon content into a curve chart to obtain an organic carbon content curve chart of the target rock stratum section.
In the embodiment, the mass and the volume of each drilling rock fragment sample and the mass and the volume of the residual rock fragment thereof are obtained through measurement, the sample density, the residual rock fragment skeleton density and the organic carbon skeleton density of each drilling rock fragment sample are obtained through calculation, then the organic carbon content of each drilling rock fragment sample can be obtained through calculation according to the sample density, the residual rock fragment skeleton density and the organic carbon skeleton density of each drilling rock fragment sample, the organic carbon content of each drilling rock fragment sample is sequentially arranged according to the obtaining sequence of the corresponding drilling rock fragment samples, and a curve diagram is introduced to obtain the organic carbon content curve diagram of the target rock interval so as to represent the continuous organic carbon content linear change of the target rock interval. By the method, the continuous organic carbon content of the target rock stratum section can be simply and efficiently measured, a large amount of manpower and material resources are saved, and the accuracy of measuring the organic carbon content of all drilling rock debris samples is improved by measuring and calculating the sample density, the residual rock debris skeleton density and the organic carbon skeleton density of each drilling rock debris sample.
Example 3:
this embodiment provides a continuous measuring device of stratum detritus density and organic carbon content, as shown in fig. 3, including sample room 1, reference room 2, gas transmission bottle 3 and manometer 8, reference room 2 carries out the pipe connection with sample room 1, gas transmission bottle 3 and manometer 8 respectively, sample room 1 carries out the pipeline intercommunication with external environment, is equipped with relief pressure valve 4 and first control valve 5 on the pipeline between gas transmission bottle 3 and reference room 2, is equipped with second control valve 6 on the pipeline between sample room 1 and reference room 2, is equipped with third control valve 7 on the pipeline of sample room 1 and external environment intercommunication.
In specific implementation, the gas transmission bottle 3 can adopt a helium bottle to output helium, the measuring container is placed into the sample chamber 1, the third control valve 7 and the second control valve 6 are opened, the first control valve 5 is closed, so that the sample chamber 1 and the reference chamber 2 are kept at normal pressure, then the third control valve 7 and the second control valve 6 are closed, the first control valve 5 is opened, a fixed amount of helium gas is stably input into the reference chamber 2 through the gas transmission bottle 3 and the pressure reducing valve 4, then the first control valve 5 is closed, the first air pressure of the reference chamber 2 can be measured by the pressure gauge 8, then the second control valve 6 is opened, the air in the reference chamber 2 is diffused into the sample chamber 1, until the air pressures of the reference chamber 2 and the sample chamber 1 are balanced, the second gas pressure in the reference chamber 2 is measured by the pressure gauge 8, so that the volume of the measuring container can be calculated according to the volume of the sample chamber 1, the volume of the reference chamber 2, the first gas pressure in the reference chamber 2 and the second gas pressure in the reference chamber 2. When the volume of the drilling rock debris sample and the volume of the residual rock debris are measured, the drilling rock debris sample and the residual rock debris can be placed into a measuring container to carry out the same operation, and then the volumes of the drilling rock debris sample and the residual rock debris can be measured. The measuring container can adopt a sample cup and a dust screen, the drilling rock debris sample or residual rock debris is placed into the sample cup, and the dust screen is covered on the sample cup to prevent sample dust from escaping everywhere under the impact of air flow.
In one possible design, the first control valve 5, the second control valve 6 and the third control valve 7 are all solenoid valves, the pressure gauge 8 is a digital pressure gauge 8, and the first control valve 5, the second control valve 6, the third control valve 7 and the pressure gauge 8 are all electrically connected with an external equipment control and display system. During specific implementation, the first control valve 5, the second control valve 6 and the third control valve 7 can be automatically controlled through an external equipment control and display system, and measurement data of the digital pressure gauge 8 is processed in time.
The present invention is not limited to the above-described alternative embodiments, and various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the claims, and which the description is intended to be interpreted accordingly.
Claims (10)
1. A method for continuously measuring the density and the organic carbon content of formation cuttings is characterized by comprising the following steps:
sequentially obtaining drilling rock debris samples at intervals along a drilling path of a target rock layer section;
drying each drilling rock debris sample, and respectively measuring the mass and the volume of the drilling rock debris sample;
burning a plurality of selected drilling debris samples to remove organic carbon components of the drilling debris samples to obtain residual debris;
measuring the mass and volume of the residual rock debris;
calculating and obtaining the residual rock fragment framework density and the organic carbon framework density of each selected drilling rock fragment sample according to the mass and the volume of each selected drilling rock fragment sample and the mass and the volume of the residual rock fragment thereof;
respectively taking the average value of the skeleton density of each residual rock fragment and the average value of the organic carbon skeleton density to obtain the average residual rock fragment skeleton density and the average organic carbon skeleton density of the target rock interval;
respectively calculating the sample density of each drilling rock debris sample according to the mass and the volume of each drilling rock debris sample;
respectively calculating the organic carbon content of each drilling rock fragment sample according to the average residual rock fragment skeleton density, the average organic carbon skeleton density and the sample density of each drilling rock fragment sample;
and sequentially arranging the organic carbon content of each drilling rock fragment sample according to the acquisition sequence of the corresponding drilling rock fragment samples, and introducing the organic carbon content into a curve chart to obtain an organic carbon content curve chart of the target rock interval.
2. A method for continuously measuring the density and the organic carbon content of formation cuttings is characterized by comprising the following steps:
sequentially obtaining drilling rock debris samples at intervals along a drilling path of a target rock layer section;
drying each drilling rock debris sample, and respectively measuring the mass and the volume;
burning each drilling rock debris sample to remove organic carbon components of the drilling rock debris sample to obtain residual rock debris;
measuring the mass and volume of the residual rock debris;
calculating the sample density, the residual rock fragment skeleton density and the organic carbon skeleton density of each drilling rock fragment sample according to the mass and the volume of each drilling rock fragment sample and the mass and the volume of the residual rock fragments of each drilling rock fragment sample;
respectively calculating the organic carbon content of each drilling rock fragment sample according to the sample density, the residual rock fragment skeleton density and the organic carbon skeleton density of each drilling rock fragment sample;
and sequentially arranging the organic carbon content of each drilling rock fragment sample according to the acquisition sequence of the corresponding drilling rock fragment samples, and introducing the organic carbon content into a curve chart to obtain an organic carbon content curve chart of the target rock interval.
3. The method for continuously measuring the density and organic carbon content of the formation cuttings as claimed in claim 1 or 2, wherein the process of measuring the volume of the drilling cuttings sample or the residual cuttings comprises the following steps:
placing the measuring container into a sample chamber with a set volume, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber with a set volume and normal pressure, closing the reference chamber, and measuring a first air pressure of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a second pressure of the reference chamber;
calculating the volume of the measuring container according to the volume of the sample chamber, the volume of the reference chamber, the first air pressure of the reference chamber and the second air pressure of the reference chamber;
filling a drilling rock debris sample or residual rock debris into a measuring container, then putting the measuring container into a sample chamber, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber at normal pressure, closing the reference chamber, and measuring a third air pressure of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a fourth pressure of the reference chamber;
and calculating the volume of the drilling debris sample or the residual debris according to the volume of the sample chamber, the volume of the reference chamber, the volume of the measuring container, the third air pressure of the reference chamber and the fourth air pressure of the reference chamber.
4. A method as claimed in claim 3, wherein the volume of the sample chamber is defined as Vy, the volume of the reference chamber is defined as Vc, the first pressure of the reference chamber is defined as P1, the second pressure of the reference chamber is defined as P2, and the volume of the measurement container is defined as Vr, such that the volume of the measurement container Vr is calculated from the formula Vc P1 ═ v + Vc P2; setting the third gas pressure of the reference chamber to be P3, the fourth gas pressure of the reference chamber to be P4, and the volume of the drilling debris sample or residual debris to be Vs, the volume of the drilling debris sample or residual debris Vs can be calculated by the formula Vc P3 ═ v-Vr-Vs + Vc) × P4.
5. The method for continuously measuring the density and organic carbon content of the formation cuttings as claimed in claim 1 or 2, wherein the process of measuring the volume of the drilling cuttings sample or the residual cuttings comprises the following steps:
placing the measuring container into a sample chamber with a set volume, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber with a set volume and normal pressure, closing the reference chamber, and measuring a first air pressure of the reference chamber and a first room temperature of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a second pressure of the reference chamber and a second room temperature of the reference chamber;
calculating the volume of the measuring container according to the volume of the sample chamber, the volume of the reference chamber, the first room temperature of the reference chamber, the second room temperature of the reference chamber, the first air pressure of the reference chamber and the second air pressure of the reference chamber;
filling a drilling rock debris sample or residual rock debris into a measuring container, then putting the measuring container into a sample chamber, and closing the sample chamber at normal pressure;
inputting a set amount of test gas into a reference chamber at normal pressure, closing the reference chamber, and measuring a third air pressure of the reference chamber and a third room temperature of the reference chamber;
communicating the reference chamber with the sample chamber until the pressure of the reference chamber is balanced with that of the sample chamber, and measuring a fourth pressure of the reference chamber and a fourth room temperature of the reference chamber;
and calculating the volume of the drilling rock fragment sample or the residual rock fragment according to the volume of the sample chamber, the volume of the reference chamber, the volume of the measuring container, the third room temperature of the reference chamber, the fourth room temperature of the reference chamber, the third air pressure of the reference chamber and the fourth air pressure of the reference chamber.
6. A continuous formation cuttings density and organic carbon content measurement method as claimed in claim 5, wherein the sample chamber volume is Vy, the reference chamber volume is Vc, the reference chamber first gas pressure is P1, the reference chamber first room temperature is T1, the reference chamber second gas pressure is P2, the reference chamber second room temperature is T2, and the measurement container volume is Vr, then the measurement container volume Vr is obtained by calculation according to the formula Vc P1/(T1Z 1) (Vy-Vr + Vc) P2/(T2Z 2), wherein Z1 is a gas compression factor under the conditions of the reference chamber first room temperature T1 and the reference chamber first gas pressure P1, and Z2 is a gas compression factor under the conditions of the reference chamber second room temperature T2 and the reference chamber second gas pressure P2; setting the third pressure of the reference chamber to be P3, the third room temperature of the reference chamber to be T3, the fourth pressure of the reference chamber to be P4, the fourth room temperature of the reference chamber to be T4, and the volume of the drilling debris sample or residual rock debris to be Vs, the volume of the drilling debris sample or residual rock debris Vs can be calculated by the formula Vc P3/(T3Z 3) (Vy-Vr-Vs + Vc) P4/(T4Z 4), wherein Z3 is the gas compression factor under the conditions of the third room temperature T3 of the reference chamber and the third pressure P3 of the reference chamber, and Z4 is the gas compression factor under the conditions of the fourth room temperature T4 of the reference chamber and the fourth pressure P4 of the reference chamber.
7. The continuous measurement method for the density and organic carbon content of formation cuttings according to claim 1, wherein the mass of a drilling cuttings sample is M1, the mass of residual cuttings is M2, the volume of the drilling cuttings sample is V1, the volume of the residual cuttings is V2, the density of a residual cuttings skeleton is rho 1, the density of an organic carbon skeleton is rho 2, then rho 1 is M2/V2, rho 2 is (M1-M2)/(V1-V2), the average density of the residual cuttings skeleton is rho 1 ', the average density of the organic carbon skeleton is rho 2', the mass of the obtained ith drilling cuttings sample is Mi, the volume is Vi, the sample density of the ith drilling cuttings sample is rho i, then rho i is Mi/Vi, and the organic carbon content of the ith drilling cuttings sample is VtociThen V istoci＝(ρi-ρ1’)/(ρ2’-ρ1’)*Vi。
8. The method of claim 2, wherein the mass of the drilling cuttings sample is M1, the mass of the residual cuttings is M2, the volume of the drilling cuttings sample is V1, and the residual cuttings sample is V1The volume of the residual rock debris is V2, the skeleton density of the residual rock debris is rho 1, the skeleton density of the organic carbon is rho 2, the sample density of the drilling rock debris sample is rho y, and the organic carbon content of the drilling rock debris sample is VtocThen ρ 1 ═ M2/V2, ρ 2 ═ M1-M2)/(V1-V2), ρ y ═ M1/V1, Vtoc＝(ρy-ρ1)/(ρ2-ρ1)*V1。
9. A continuous formation cuttings density and organic carbon content measuring device, which can be used in the method of any one of claims 1-8, wherein the continuous formation cuttings density and organic carbon content measuring device comprises: including sample room (1), reference room (2), gas transmission bottle (3) and manometer (8), reference room (2) carry out the pipe connection with sample room (1), gas transmission bottle (3) and manometer (8) respectively, the pipeline intercommunication is carried out with external environment in sample room (1), is equipped with relief pressure valve (4) and first control valve (5) on the pipeline between gas transmission bottle (3) and reference room (2), is equipped with second control valve (6) on the pipeline between sample room (1) and reference room (2), is equipped with third control valve (7) on the pipeline of sample room (1) and external environment intercommunication.
10. The continuous measurement device for the density and organic carbon content of the formation cuttings as claimed in claim 9, wherein: the first control valve (5), the second control valve (6) and the third control valve (7) are electromagnetic valves, the pressure gauge (8) is a digital pressure gauge, and the first control valve (5), the second control valve (6), the third control valve (7) and the pressure gauge (8) are all electrically connected with an external equipment control and display system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110198992.3A CN112964598A (en) | 2021-02-22 | 2021-02-22 | Method and device for continuously measuring density and organic carbon content of formation cuttings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110198992.3A CN112964598A (en) | 2021-02-22 | 2021-02-22 | Method and device for continuously measuring density and organic carbon content of formation cuttings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112964598A true CN112964598A (en) | 2021-06-15 |
Family
ID=76285570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110198992.3A Pending CN112964598A (en) | 2021-02-22 | 2021-02-22 | Method and device for continuously measuring density and organic carbon content of formation cuttings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112964598A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115015043A (en) * | 2022-07-22 | 2022-09-06 | 中国石油大学(华东) | A kind of detection method of low-density solid phase content of oil-based drilling fluid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570772Y (en) * | 2002-10-11 | 2003-09-03 | 石油大学(北京) | Apparatus for measuring fine and close rock pore |
| CN103983746A (en) * | 2014-05-30 | 2014-08-13 | 中国石油化工股份有限公司胜利油田分公司西部新区研究院 | Volcanic material-enriched source rock organic carbon recovery method |
| CN106153522A (en) * | 2016-08-23 | 2016-11-23 | 重庆泛嘉晟禾工程技术检测有限公司 | Core porosity measurement apparatus and measuring method |
| CN108442927A (en) * | 2018-03-12 | 2018-08-24 | 中国地质大学（北京） | Landwaste porosity measurement method, measuring device and the application of site mud logging application |
| CN109946197A (en) * | 2019-03-21 | 2019-06-28 | 重庆地质矿产研究院 | Shale organic carbon determination method |
-
2021
- 2021-02-22 CN CN202110198992.3A patent/CN112964598A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570772Y (en) * | 2002-10-11 | 2003-09-03 | 石油大学(北京) | Apparatus for measuring fine and close rock pore |
| CN103983746A (en) * | 2014-05-30 | 2014-08-13 | 中国石油化工股份有限公司胜利油田分公司西部新区研究院 | Volcanic material-enriched source rock organic carbon recovery method |
| CN106153522A (en) * | 2016-08-23 | 2016-11-23 | 重庆泛嘉晟禾工程技术检测有限公司 | Core porosity measurement apparatus and measuring method |
| CN108442927A (en) * | 2018-03-12 | 2018-08-24 | 中国地质大学（北京） | Landwaste porosity measurement method, measuring device and the application of site mud logging application |
| CN109946197A (en) * | 2019-03-21 | 2019-06-28 | 重庆地质矿产研究院 | Shale organic carbon determination method |
Non-Patent Citations (2)
| Title |
|---|
| 李玉桓 等: "《储油岩热解地球化学录井评价技术》", 30 April 1993, 石油工业出版社 * |
| 郭双等: "致密油藏烃源岩有机碳含量预测方法研究", 《中国锰业》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115015043A (en) * | 2022-07-22 | 2022-09-06 | 中国石油大学(华东) | A kind of detection method of low-density solid phase content of oil-based drilling fluid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11851965B2 (en) | Core sampling and analysis using a sealed pressurized vessel | |
| US7805982B2 (en) | Portable core flood apparatus for conducting on-site permeability measurements | |
| CN106468172B (en) | A logging interpretation method for low-resistivity reservoirs in ultra-low permeability sandstone reservoirs | |
| CN103575631B (en) | Rock permeability test macro and method of testing | |
| AU2017272267B1 (en) | Method for characterizing rock physical characteristics of deeply buried carbonate rocks | |
| CN106950347A (en) | A kind of method for evaluating mud shale each group partial volume | |
| CN201242522Y (en) | Measuring device suitable for hypotonic extra-hypotonic rock core porosity | |
| CN102374963A (en) | Test device for evaluating well completion manner of coal bed methane | |
| CN103226089B (en) | Shale gas permeability determination method | |
| CN112487620B (en) | Evaluation method of shale oil movable resource quantity | |
| CN108827853B (en) | Nuclear magnetic resonance-based tight reservoir rock electric measurement device and measurement method | |
| CN104298883A (en) | Establishment method for hydrocarbon source rock hydrocarbon production rate charts in petroleum resource assessment | |
| CN112485175B (en) | Rock porosity measuring method and measuring device | |
| EA028272B1 (en) | Apparatus and method for gas volume retained coring | |
| WO2022150572A1 (en) | Method and apparatus for measuring stress dependency of shale permeability with steady-state flow | |
| CN104297126A (en) | Gas seepage starting pressure gradient measuring device and method for low-permeability reservoir | |
| US20170284197A1 (en) | Methods for In-Situ Multi-Temperature Measurements Using Downhole Acquisition Tool | |
| JP2004012136A (en) | Permeability measuring method and permeability measuring instrument for base rock, etc | |
| Nikitin et al. | Crushed-rock analysis workflow based on advanced fluid characterization for improved interpretation of core data | |
| Li et al. | New fractal-dimension-based relation model for estimating absolute permeability through capillary pressure curves | |
| CN106126936A (en) | A kind of integrated evaluating method of fine and close low permeability reservoir fracture effectivity | |
| CN112964598A (en) | Method and device for continuously measuring density and organic carbon content of formation cuttings | |
| CN106198342A (en) | Quickly measure the hydraulic pressure succusion pilot system of hypotonic rock permeability parameter | |
| CN105003258A (en) | Method for acquiring density framework parameters of methane fluid in high temperature high pressure air layer | |
| CN111058832A (en) | Experimental device and method for simulating fracture of two well cementation interfaces |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210615 |
|
| RJ01 | Rejection of invention patent application after publication |