CN109630102A - Each layer gas-bearing area measuring method of multilayer system Low permeability and competent sand gas well - Google Patents
Each layer gas-bearing area measuring method of multilayer system Low permeability and competent sand gas well Download PDFInfo
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- CN109630102A CN109630102A CN201811429877.7A CN201811429877A CN109630102A CN 109630102 A CN109630102 A CN 109630102A CN 201811429877 A CN201811429877 A CN 201811429877A CN 109630102 A CN109630102 A CN 109630102A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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Abstract
A kind of each layer gas-bearing area measuring method of multilayer system Low permeability and competent sand gas well, a point method is split using dynamic layered, the following steps are included: measuring gas well overall dynamics control reserve using pressure decline method, yield meteod of instability or flowing material balance method, gas well overall dynamics control reserve G under the conditions of combination producing is obtained；Carry out each payzone productivity test in scene, obtain different payzone production capacity data, is i.e. unit thickness payzone produces tolerance daily, establishes quantitative relationship between each gas-bearing formation gas deliverability, carries out thickness normalized processing；According to the ratio of each layer position standardization total standard thickness of thickness Zhan, splits and be divided into each layer dynamic control reserve；Based on each layer dynamic control reserve split point, each interval porosity, gas saturation and the gas pay thickness of binding assay measure each layer gas-bearing area using volumetric method.The present invention splits point each layer gas-bearing area of measurement by layering, to provide foundation for gas field Efficient Development.
Description
Technical field
It the present invention relates to hypotonic-DAMAGE OF TIGHT SAND GAS RESERVOIRS development field, is joined using gas well liquid loading test, gas-bearing formation reservoir geology
Number measured reserves and its method for developing development degree, more particularly, to a kind of each layer of multilayer system Low permeability and competent sand gas well
Gas-bearing area measuring method.
Background technique
Hypotonic-compact sandstone gas is the important gas reservoir types in China, and reserves scale is huge, and the such gas reservoir of Efficient Development is to guarantor
Card China's natural gas stable supplying is of great significance.Hypotonic-tight gas reservoir gas-bearing formation is in lenticular, has small scale, vertical more
The feature of interval development.Gas well is substantially carried out the dynamic holdup measurement of multilayer system entirety at present, does not carry out respectively to each interval
The means of dynamic holdup measurement, also do not carry out the means of gas-bearing area measurement, this is but also can not be accurate respectively to each interval
Understand the reserves and/or gas-bearing area situation of each interval, it can not effectively Instructing manufacture activity.
Therefore, in order to solve many insufficient and defects of the above-mentioned prior art, it is necessary to which studying a kind of multilayer is hypotonic cause
Close each layer gas-bearing area measuring method of sandstone gas well.
Summary of the invention
The present invention is completed in view of at least one above problem, the present invention is in hypotonic-tight sand gas well multilayer system
Overall dynamics reserves measurement on the basis of, design invented it is dynamic layered split a point method, measure each interval dynamic holdup and/or let out
Gas area, to provide effective foundation for Well pattern edjustment and gas reservoir entirety Efficient Development.
It should be noted that gas well waterout control reserve: referring in exploitation oil in place in existing technology and existing
Under conditions of well pattern mining method is constant, gas well puts into production until gas production and the strata pressure involved in range are reduced to
When zero, the natural gas total amount that can be flowed out from gas reservoir.
Specifically, according to an aspect of the present invention, a kind of each layer gas-bearing area of multilayer system Low permeability and competent sand gas well is provided
Measuring method, it is characterised in that this method splits a point method using dynamic layered, comprising the following steps:
Gas well overall dynamics control reserve is measured using pressure decline method, yield meteod of instability or flowing material balance method, is obtained
Gas well overall dynamics control reserve G under the conditions of combination producing；
Carry out each payzone productivity test in scene, obtains different payzone production capacity data, i.e. unit thickness payzone day
Gas production establishes quantitative relationship between series of strata gas-bearing formation gas deliverability, carries out thickness normalized processing；
According to the ratio of each layer position standardization total standard thickness of thickness Zhan, splits and be divided into each layer dynamic control reserve；
Based on each layer dynamic control reserve split point, each interval porosity of binding assay, the gentle thickness of gas saturation
Degree measures each layer gas-bearing area using volumetric method.
According to a further aspect of the invention, the single layer dynamic control reserve G of measurementMountain 2It is equal to
Wherein, HBox 8’、HMountain 1’、HMountain 2’、HTaiyuan' it is respectively thickness after each layer standardization, G is the control storage of gas well overall dynamics
Amount.
According to a further aspect of the invention, full in conjunction with each interval porosity, gassiness based on each layer dynamic control reserve split point
With degree and gas pay thickness, each layer gas-bearing area is measured using volumetric method, which is equivalent to the discouraged area of each layer of gas well.
According to a further aspect of the invention, reserves volumetric method are as follows:
In formula: G is gas in-place, 108m3；A is gas-bearing area, km2；H is gas-bearing net pay, m；φ is gas
Layer porosity, %；Sg is gas saturation, %；Psc is ground standard pressure, MPa, K；Tsc is face normal temperature,
293.15K；Pi is gas reservoir original formation pressure, MPa；T is average gas-bearing formation temperature K；Zi is original gas deviation factor.
According to a further aspect of the invention, the gas well single layer gas-bearing area of measurement or discouraged area AMountain 2Are as follows:
In formula: hMountain 2For 2 sections of mountain gas pay thickness, φMountain 2For 2 hole porosity of mountain, SgMountain 2For 2 sections of mountain gas saturation.
Compared with prior art, the beneficial effects of the present invention are:
The present invention establishes the quantification corresponding relationship of different payzone gas deliverabilities, has carried out accurate thickness normalized place
Reason splits point each layer dynamic control reserve of measurement eventually by layering.Further, in measurement gas-bearing formation porosity, gas saturation
Etc. on the basis of parameters, gas deliverability quantitative relationship is established according to gas well difference interval Yielding ability difference, carries out thickness calibration
Change processing splits point each layer dynamic control reserve of measurement and/or a discouraged area eventually by layering, to mention for gas field Efficient Development
For foundation.
Detailed description of the invention
Fig. 1 is that a kind of multilayer system gas-bearing formation gas deliverability quantitative relationship of preferred embodiment according to the present invention determines schematic diagram.
Fig. 2 is a kind of gas well multilayer system pay thickness standardization schematic diagram of preferred embodiment according to the present invention.
Fig. 3 is each layer dynamic control reserve and/or discouraged area example that a kind of preferred embodiment measures according to the present invention.
Specific embodiment
With reference to the accompanying drawing, preferred forms of the invention, specific implementation here are described by preferred embodiment
Mode is to explain the present invention in detail, should not be construed as limiting the invention, and is not departing from spirit and reality of the invention
In the case where matter range, various changes and modifications can be made, these should all be included within protection scope of the present invention.
Embodiment 1
Referring to attached drawing 1-3, it is preferable that the present invention provides a kind of each layer gas-bearing areas of multilayer system Low permeability and competent sand gas well
Measuring method, it is characterised in that this method splits a point method using dynamic layered, comprising the following steps:
Gas well overall dynamics control reserve is measured using pressure decline method, yield meteod of instability or flowing material balance method, is obtained
Gas well overall dynamics control reserve G under the conditions of combination producing；
Carry out each payzone productivity test in scene, obtains different payzone production capacity data, i.e. unit thickness payzone day
Gas production establishes quantitative relationship between series of strata gas-bearing formation gas deliverability, carries out thickness normalized processing；
According to the ratio of each layer position standardization total standard thickness of thickness Zhan, splits and be divided into each layer dynamic control reserve；
Based on each layer dynamic control reserve split point, each interval porosity of binding assay, the gentle thickness of gas saturation
Degree measures each layer gas-bearing area using volumetric method.
Preferably, the single layer dynamic control reserve G of measurementMountain 2It is equal to
Wherein, HBox 8’、HMountain 1’、HMountain 2’、HTaiyuan' it is respectively thickness after each layer standardization, G is the control storage of gas well overall dynamics
Amount.
It is preferably based on each layer dynamic control reserve split point, in conjunction with each interval porosity, the gentle thickness of gas saturation
Degree measures each layer gas-bearing area using volumetric method, which is equivalent to the discouraged area of each layer of gas well.
Preferably, reserves volumetric method are as follows:
In formula: G is gas in-place, 108m3；A is gas-bearing area, km2；H is gas-bearing net pay, m；φ is gas
Layer porosity, %；Sg is gas saturation, %；Psc is ground standard pressure, MPa, K；Tsc is face normal temperature, K；Pi is
Gas reservoir original formation pressure, MPa；T is average gas-bearing formation temperature K；Zi is original gas deviation factor.Preferably, original gas is inclined
Poor coefficient Zi can be determined by experiment test, using Ordos Basin Shenmu County gas field payzone as 8 sections of box, 1 section of mountain, 2 sections of mountain, Taiyuan
For 4 gas pay sections such as group, by measuring, in this area, Psc is ground standard pressure, MPa, value 0.101MPa； Tsc
For face normal temperature, degree Kelvin k, value 293.15K；Pi is gas reservoir original formation pressure, Mpa, value 29Mpa；T is average air
Layer temperature K, value 380k；Zi is original gas deviation factor, zero dimension, value 0.96.Preferably, other parameters pass through well logging
It obtains, it is different because of each well.
Preferably, the discouraged area A of the gas well single layer of measurementMountain 2Are as follows:
In formula: hMountain 2For 2 sections of mountain gas pay thickness, φMountain 2For 2 hole porosity of mountain, SgMountain 2For 2 sections of mountain gas saturation.
Preferably, the present invention is on the basis of measuring the parameters such as gas-bearing formation porosity, gas saturation, according to gas well different layers
Section Yielding ability difference establishes gas deliverability quantitative relationship, carries out thickness normalized processing, and it is each to split point measurement eventually by layering
Layer dynamic control reserve and/or discouraged area, to provide foundation for gas field Efficient Development.
Embodiment 2
Referring to Fig. 1-3, it is preferable that the present invention provides a kind of each layer gas-bearing areas of multilayer system Low permeability and competent sand gas well to survey
Determine method, it is characterised in that this method splits a point method using dynamic layered, comprising the following steps:
(1) gas well multilayer is measured using conventional methods such as pressure decline method, yield meteod of instability, flowing material balance methods first
It is whole dynamic control reserve, obtains whole Estimation of Gas Well Dynamic Reserves under the conditions of combination producing.
(2) carry out each payzone productivity test in scene, obtain different payzone production capacity data, i.e. unit thickness payzone
It produces tolerance daily, establishes quantitative relationship between series of strata gas-bearing formation gas deliverability, carry out thickness normalized processing.
For example, Ordos Basin Shenmu County gas field payzone is 4 gas pays such as 8 sections of box, 1 section of mountain, 2 sections of mountain, Taiyuan Forma-tion
Section, on-the-spot test shows: aforementioned four interval unit thickness gas-bearing formation daily output tolerance be respectively 0.10 ten thousand sides/day, 0.13 ten thousand sides/
It, 0.21 ten thousand sides/day, 0.18 ten thousand sides/day, 2 sections of mountain and Taiyuan Forma-tion payzone production capacity are most strong.The daily output of bonding unit thickness gas-bearing formation
Tolerance data establish quantitative relationship (referring to Fig. 1) between multilayer system gas-bearing formation gas deliverability, carry out different interval gas pay thickness standardization
Processing, with 2 sections of mountain for standard thickness, it may be assumed that if if the production gas thickness 1m of 2 sections of mountain, 8 sections of box, 1 section of mountain, Taiyuan Forma-tion respective 1m originally
It is respectively 0.48m, 0.62m, 0.86m that thick gas-bearing formation, which is converted to 2 sections of mountain thickness,.
(3) according to each layer gas-bearing formation developmental state of gas well, carry out thickness normalized processing (referring to fig. 2), marked according to each layer position
The ratio of the total standard thickness of standardization thickness Zhan splits transfer state control reserve.
By taking S1 well as an example, bore meet 8 sections of box, 1 section of mountain, 2 sections of mountain, Taiyuan Forma-tion gas pay thickness be respectively HBox 8、HMountain 1、HMountain 2、
HTaiyuan, thickness is respectively H after standardizationBox 8’、HMountain 1’、HMountain 2’、HTaiyuan', gas well waterout control reserve is G, then 2 sections of mountain dynamic controls
Reserves batch divide method GMountain 2Are as follows:
(4) the dynamic control reserve split point based on each layer, in conjunction with each interval porosity, gas saturation, gas pay thickness etc.
Reservoir parameter measures gas-bearing area using volumetric method, which is equivalent to the discouraged area of gas well.
Reserves measure volumetric method specifically:
In formula: G is gas in-place, 108m3；A is gas-bearing area, km2；H is gas-bearing net pay, m；φ is gas
Layer porosity, %；Sg is gas saturation, %；Psc is ground standard pressure, MPa, K；Tsc is face normal temperature,
293.15K；Pi is gas reservoir original formation pressure, MPa；T is average gas-bearing formation temperature K；Zi be original gas deviation factor, it is no because
It is secondary.
The discouraged range A in 2 sections of mountainMountain 2Are as follows:
In formula: hMountain 2For 2 sections of mountain gas pay thickness, φMountain 2For 2 hole porosity of mountain, SgMountain 2For 2 sections of mountain gas saturation.
Preferably, after measuring each layer dynamic control reserve of gas well and discouraged area, it is known that shape is employed in each interval exploitation of gas reservoir
Condition provides foundation to formulate raising reserves degree technical cue.
Such as: show that the discouraged range in 2 sections of gas well mountain is 0.21km2/ mouth then knows that 2 sections of mountain reserves exploitation degree is lower, needs
Want 5 mouthfuls of well (1km of every square kilometre of deployment2/ 0.21 ≈ 5) can be achieved reserves all effectively employ；The discouraged range in 1 section of mountain is
0.12km2, then know that 1 section of mountain reserves exploitation is more insufficient, theoretically needs 8 mouthfuls of well (1km of every square kilometre of deployment2/0.12≈
8) reserves can be achieved all effectively to employ.
Preferably, referring to Fig. 1-3, a kind of each layer gas-bearing area of multilayer system Low permeability and competent sand gas well measurement side is additionally provided
Method, it is characterised in that this method splits a point method using dynamic layered, comprising the following steps:
(1) measuring certain hypotonic-compact sandstone gas field S3 gas well overall dynamics control reserve is 0.2516 hundred million sides.
(2) gas pay thickness of 8 sections of S3 gas well box of measurement acquisition, 1 section of mountain, 2 sections of mountain, Taiyuan Forma-tion, respectively 3.8m, 5.1m,
4.9m、6.5m。
(3) according to on-the-spot test data, quantitative relationship (referring to Fig. 1) between multilayer system gas-bearing formation gas deliverability is established, gas is carried out
The thickness normalized processing of layer, 8 sections of box, 1 section of mountain, 2 sections of mountain, Taiyuan Forma-tion standardization thickness be respectively 1.8m, 3.2m, 4.9m,
5.6m。
(4) it according to standardization thickness accounting, carries out dynamic control and splits point, 8 sections of box, 1 section of mountain, 2 sections of mountain, Taiyuan Forma-tion dynamic control
Reserves processed are respectively 0.0297 hundred million sides, 0.0514 hundred million sides, 0.0797 hundred million sides, 0.0909 hundred million sides.
(5) each interval gas-bearing formation hole, saturation parameters are measured, gas-bearing area is measured using volumetric method, the gas area is equivalent
Lose heart area in the interval gas well (referring to Fig. 3).
In conclusion the beneficial effects of the present invention are:
The present invention establishes the quantification corresponding relationship of different payzone gas deliverabilities, has carried out accurate thickness normalized place
Reason is established on the basis of measuring the parameters such as gas-bearing formation porosity, gas saturation according to gas well difference interval Yielding ability difference
Gas deliverability quantitative relationship carries out thickness normalized processing, eventually by layering split point each layer dynamic control reserve of measurement and/or
Lose heart area, to provide foundation for gas field Efficient Development.
The present invention is not limited to above-mentioned specific embodiments.It is understood that not departing from spirit and substance of the present invention model
In the case where enclosing, various changes and modifications can be made, these should all be included within protection scope of the present invention.
Claims (1)
1. a kind of each layer gas-bearing area measuring method of multilayer system Low permeability and competent sand gas well, it is characterised in that this method is using dynamic
A point method is split in layering, comprising the following steps:
Gas well overall dynamics control reserve is measured using pressure decline method, yield meteod of instability or flowing material balance method, obtains and closes layer
Gas well overall dynamics control reserve G under mining conditions；
Carry out each payzone productivity test in scene, obtains different payzone production capacity data, i.e. unit thickness payzone daily gas
Amount, establishes quantitative relationship between series of strata gas-bearing formation gas deliverability, carries out thickness normalized processing；
According to the ratio of each layer position standardization total standard thickness of thickness Zhan, splits and be divided into each layer dynamic control reserve；
Based on each layer dynamic control reserve split point, each interval porosity, gas saturation and the gas pay thickness of binding assay are adopted
Each layer gas-bearing area is measured with volumetric method；
Wherein, the gas well single layer gas-bearing area A of measurementMountain 2Are as follows:
In formula: hMountain 2For 2 sections of mountain gas pay thickness, φMountain 2For 2 hole porosity of mountain, SgMountain 2For 2 sections of mountain gas saturation, GMountain 2For 2 sections of mountain
Gas-bearing formation dynamic control reserve, 108m3；Psc is ground standard pressure, MPa, K；Tsc is face normal temperature, 293.15K；Pi is
Gas reservoir original formation pressure, MPa；T is average gas-bearing formation temperature K；Zi is original gas deviation factor.
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| CN201811429877.7A CN109630102B (en) | 2018-11-28 | 2018-11-28 | Method for measuring gas-containing area of each layer of multilayer low-permeability tight sandstone gas well |
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Cited By (1)
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| CN111155981A (en) * | 2019-12-20 | 2020-05-15 | 中煤科工集团西安研究院有限公司 | Method for monitoring gas production rate of coal-bed gas well by adopting double coal beds and adopting combined drainage and production layers |
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| CN109630102B (en) | 2022-11-11 |
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