CN118933742A - A monitoring device and method for early drilling overflow - Google Patents
A monitoring device and method for early drilling overflow Download PDFInfo
- Publication number
- CN118933742A CN118933742A CN202310533376.8A CN202310533376A CN118933742A CN 118933742 A CN118933742 A CN 118933742A CN 202310533376 A CN202310533376 A CN 202310533376A CN 118933742 A CN118933742 A CN 118933742A
- Authority
- CN
- China
- Prior art keywords
- doppler signal
- data
- monitoring device
- monitoring
- doppler
- 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
- 238000012806 monitoring device Methods 0.000 title claims abstract description 118
- 238000005553 drilling Methods 0.000 title claims abstract description 114
- 238000000034 method Methods 0.000 title claims abstract description 68
- 238000012544 monitoring process Methods 0.000 claims abstract description 133
- 239000012530 fluid Substances 0.000 claims abstract description 110
- 230000000694 effects Effects 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims description 29
- 238000001914 filtration Methods 0.000 claims description 22
- 230000008859 change Effects 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 230000033001 locomotion Effects 0.000 claims description 10
- 238000010183 spectrum analysis Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 239000011435 rock Substances 0.000 claims description 8
- 230000003628 erosive effect Effects 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 claims description 4
- 210000002445 nipple Anatomy 0.000 abstract description 35
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 230000009545 invasion Effects 0.000 description 29
- 230000008569 process Effects 0.000 description 13
- 239000007788 liquid Substances 0.000 description 8
- 230000002829 reductive effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000001419 dependent effect Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 208000033999 Device damage Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/107—Locating fluid leaks, intrusions or movements using acoustic means
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
- E21B47/017—Protecting measuring instruments
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
- E21B47/18—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geophysics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Acoustics & Sound (AREA)
- Remote Sensing (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention provides a device and a method for monitoring the overflow of a well drilling in early stage, wherein a downhole monitoring device in the device comprises: the underground monitoring device comprises a nipple, a Doppler signal generator, a Doppler signal receiver, a data acquisition module and a data uploading module; the ground monitoring system comprises a ground signal receiving device and a Doppler signal monitoring system, the underground monitoring device nipple is wound on the outer side of the drill rod, the Doppler signal generator and the receiver are arranged on the outer side of the underground monitoring device nipple, and the Doppler ultrasonic effect is utilized to measure the fluid flow state in the annulus; the Doppler signal monitoring device analyzes the frequency variation characteristic data of the reflected signals, and determines the gas-intrusion risk condition by combining the frequency variation-gas-content correlation data. By adopting the scheme, the defects of time delay and inaccurate monitoring data of the existing overflow monitoring technology are overcome, non-contact measurement is adopted, drilling equipment is not damaged, normal drilling operation is not affected, and the method is suitable for early overflow monitoring under different working conditions.
Description
Technical Field
The invention relates to the technical field of monitoring while drilling of petroleum gas wells and deep water drilling, in particular to a monitoring device and a monitoring method for early drilling overflow.
Background
In the offshore oil development process, well kick accidents are easy to occur and the safety and timeliness of drilling are seriously influenced by complex factors such as a drilling fluid narrow safety density window, a fractured carbonate reservoir, a high-temperature high-pressure stratum and the like; if the deep water kick is not found timely, the gas invasion fluid possibly enters the underwater blowout preventer and the marine riser, the structure of the blowout preventer is complex, and the gas invasion fluid possibly forms solid hydrate in the high-pressure low-temperature environment in the blowout preventer, so that the blowout preventer is invalid; the gas invasion fluid entering the riser group can cause unbalance of the internal pressure and the external pressure of the riser group, so that the riser group is crushed, the drilling fluid cannot be circulated, and a blowout accident is caused. Therefore, the method can find the kick early in the drilling process, and has very important significance for gas well and deep water drilling operation.
Most current kick monitoring methods applied in the field of drilling operations rely on measurement data provided by a comprehensive logging tool, including: outlet flow, total pool volume of drilling fluid, pump pressure, pump stroke, hook load, drilling fluid outlet density, etc. The measurement of these parameters is done on top of the wellhead, so if a kick occurs, which is already the kick-up period, the formation fluid that invades the wellbore will reach the wellhead soon, monitoring for time-lapse delays, and the practicality is poor. For example, the intelligent judgment device for the drilling fluid quantity and the intelligent overflow and lost circulation early warning system proposed by the patent document CN204532178U cannot perform real-time early warning at the initial overflow stage of flow data recorded on the wellhead injection and discharge pipes, and lack real-time monitoring effect, and overflow recognition is performed only by monitoring the change of the drilling fluid quantity at the wellhead, which is a kick-up period. The device for monitoring the surface of early overflow leakage of drilling provided by patent document CN103277089A collects the flow of an inlet and outlet, the bit pressure, the rotating speed of a drilling disc, the torque of the drilling disc, the liquid level of a slurry pool, the pressure of a casing pipe and the pressure of a vertical pipe, and calculates and judges the accident probability by analyzing the data and comparing the data with an event model and a well kick model. The scheme is only used as a method for monitoring the kick by ground data, lacks of real-time performance and early warning on overflow, the design early warning accuracy depends on the data precision of a kick leakage model database, a judgment result is a probability event, the reliability is defective, in addition, the scheme is mainly used for monitoring the ground data and has postponement, if the alarm is not timely, the blowout accident is inevitably occurred, the consequence is not envisaged, and the requirement on processing measures is extremely high; in addition, the identification accuracy degree depends on a large amount of kick data as a basis, and the accuracy is not enough; according to the device and the method for monitoring the overflow of the shaft in the early stage, which are disclosed in the patent document CN104632198A, the measuring device is arranged in the middle of the shaft, so that the device is easy to be damaged by rock debris impact, the ascending height of the overflow after invading an annular space cannot be monitored in real time, and the time for the overflow to ascend to a wellhead cannot be estimated.
Therefore, technologies and methods capable of accurately and real-timely monitoring the underground dynamic overflow risk are urgently needed at present, and oil gas provides a foundation for realizing safe and efficient development of resources.
The information disclosed in the background section of the invention is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
To solve the above problems, the present invention provides a monitoring device for early drilling overflow, in one embodiment, the device comprises a downhole monitoring device and a surface monitoring system in communication with the downhole monitoring device;
the downhole monitoring device includes: the underground monitoring device comprises a nipple, a Doppler signal generator, a Doppler signal receiver, a data acquisition module and a data uploading module;
The downhole monitoring device nipple is wound on the outer side of the drill rod, and the Doppler signal generator and the Doppler signal receiver are arranged on the outer side of the downhole monitoring device nipple and are used for measuring the fluid flow state in the annulus by using the Doppler ultrasonic effect;
the Doppler signal receiver receives the ultrasonic reflected signal, and the data acquisition module carries out filtering processing on the received Doppler signal to obtain frequency-variant characteristic data of the reflected signal;
the ground monitoring system comprises a ground signal receiving device and a Doppler signal monitoring system which are in communication connection;
the ground signal receiving device is used for receiving the frequency-varying characteristic data of the reflected signals from the data uploading module;
the Doppler signal monitoring device is used for analyzing the frequency-varying characteristic data of the reflected signals, determining the gas content by combining the frequency-varying-gas content associated data, and judging the gas invasion risk condition.
Further, in one embodiment, the downhole monitoring device nipple is provided with a built-in space slot, and the data acquisition module and the data uploading module are arranged in the built-in space slot.
Preferably, in one embodiment, the Doppler signal generator and the Doppler signal receiver are on the same line, and the line on which the Doppler signal generator and the Doppler signal receiver are positioned is opposite to the shaft at a set angle.
Optionally, in an embodiment, the doppler signal generator is connected with the doppler signal receiver through a cable, and the connecting wire is provided with a cable protection shell, so as to prevent the connecting wire from being damaged by fluid erosion or rock debris impact.
Further, in one embodiment, a cable guide hole is arranged between the Doppler signal receiver and the built-in space groove of the short joint of the underground monitoring device, and the Doppler signal receiver is connected with the data acquisition module through a cable.
In an alternative embodiment, one or more underground monitoring device pup joints are vertically arranged outside the drill rods with different depths, and each underground monitoring device pup joint comprises a Doppler signal generator, a Doppler signal receiver, a built-in space groove, a data acquisition module and a data uploading module.
Preferably, in one embodiment, one or more sets of doppler signal generators and doppler signal receivers are arranged outside the nipple of the downhole monitoring device at the same depth, and the layout modes include an alignment layout, a tricyclic layout and an axis layout mode.
In an alternative embodiment, the data acquisition module performs filtering processing on the obtained ultrasonic reflection signal during application, and a low-pass filter is adopted to eliminate a high-frequency data retention data set area for the Doppler signal monitoring system to analyze the frequency variation characteristics of the ultrasonic reflection signal corresponding to the current drilling fluid.
Further, in an alternative embodiment, the doppler signal monitoring system determines the final doppler frequency of the reflected signal of the ultrasound wave according to the following equation:
Wherein f 1 denotes the emitted ultrasonic frequency; f 3 denotes the received ultrasonic frequency; v represents the movement velocity of the particles in the drilling fluid; alpha represents the included angle between the ultrasonic beam and the axis of the tube; c represents the speed of sound in the fluid.
Preferably, in one embodiment, the Doppler signal monitoring system is further configured to perform a spectral analysis on the received ultrasonic reflected signal, analyze and calculate a velocity of the reflector within the riser section, identify a fluid invasion condition based on the difference in the reflected velocities of the formation fluid and the fluid in the wellbore, and identify an early flooding condition based on the reflected velocities.
Based on the application aspect of the device in any one or more of the embodiments, the invention further provides a method for early monitoring of well overflow, the method being applied to the device in any one or more of the embodiments, the method comprising:
the method comprises the steps of setting a device, namely mounting a nipple of an underground monitoring device to the outer side of a drill rod with a required depth, setting a Doppler signal generator and a Doppler signal receiver on the outer side of the nipple of the underground monitoring device, and establishing communication connection among the Doppler signal receiver, a data acquisition module and a ground monitoring system;
A signal acquisition step, starting an underground monitoring device, enabling a Doppler signal generator to continuously emit ultrasonic waves towards drilling fluid in annulus, and continuously acquiring ultrasonic reflected signals by using a Doppler signal receiver;
a signal processing step, wherein the data acquisition module carries out filtering processing on the obtained ultrasonic reflection signals and analyzes the frequency variation characteristics of the ultrasonic reflection signals corresponding to the current drilling fluid;
Uploading data, namely uploading signal frequency-change characteristic data obtained through underground processing to a ground monitoring system through a data uploading module, receiving the signal frequency-change characteristic data by a ground signal receiving device, transmitting the signal frequency-change characteristic data to a Doppler signal monitoring system, and determining the gas-containing rate condition of the current drilling fluid based on the signal frequency-change characteristic data and frequency-gas-containing rate associated data;
and a monitoring and early warning step, wherein if the determined gas content reaches a set condition, alarm information is output for continuous monitoring, otherwise, the associated signal frequency change characteristic data and the gas content are recorded for continuous monitoring.
Further, in one embodiment, the frequency-gas-content-related data is determined through a gas-content monitoring experiment, gas is injected into the drilling fluid in the set simulation shaft device by using the gas pump device based on different gas injection speeds, and the corresponding Doppler signal frequency-dependent characteristic is obtained by using the monitoring device and recorded in association with the gas injection speed as the frequency-gas-content-related data.
Optionally, in one embodiment, one or more sets of doppler signal generators and doppler signal receivers are disposed outside the sub of the downhole monitoring device at the same depth, and the layout modes include an alignment layout, a tricyclic layout and an axis layout.
Further, in one embodiment, the data acquisition module performs filtering processing on the obtained ultrasonic reflection signal, and a low-pass filter is adopted to eliminate a high-frequency data retention data set area for the Doppler signal monitoring system to analyze the frequency variation characteristics of the ultrasonic reflection signal corresponding to the current drilling fluid.
In an alternative embodiment, the final Doppler frequency shift of the ultrasound reflected signal is determined by the Doppler signal monitoring system as follows:
Wherein f 1 denotes the emitted ultrasonic frequency; f 3 denotes the received ultrasonic frequency; v represents the movement velocity of the particles in the drilling fluid; alpha represents the included angle between the ultrasonic beam and the axis of the tube; c represents the speed of sound in the fluid.
Preferably, in one embodiment, the Doppler signal monitoring system performs a spectral analysis on the received ultrasonic reflected signal, analyzes and calculates the velocity of the reflector in the section of the riser, and identifies the fluid invasion condition and the early overflow condition based on the difference between the reflected velocities of the formation fluid and the fluid in the well bore and the reflected velocity.
Based on other aspects of the method described in any one or more of the embodiments, the present invention also provides a storage medium having stored thereon program code for implementing the method described in any one or more of the embodiments.
Compared with the closest prior art, the invention has the following beneficial effects:
The invention provides a monitoring device and a method for early drilling overflow, wherein a downhole monitoring device in the device comprises: the underground monitoring device comprises a nipple, a Doppler signal generator, a Doppler signal receiver, a data acquisition module and a data uploading module; the ground monitoring system comprises a ground signal receiving device and a Doppler signal monitoring system, the underground monitoring device nipple is wound on the outer side of the drill rod, the Doppler signal generator and the receiver are arranged on the outer side of the underground monitoring device nipple, and the Doppler ultrasonic effect is utilized to measure the fluid flow state in the annulus; the sensor is not placed in the drilling fluid, but is tightly attached to the outer wall of the water-proof pipe, is a non-contact measurement, does not damage drilling equipment, does not affect normal drilling operation, is convenient and quick to install,
The signal monitoring device analyzes the frequency-dependent characteristic data of the reflected signal, determines the gas-containing rate according to the frequency-dependent gas-containing rate correlation data to judge the gas invasion risk condition, monitors the gas invasion condition in the riser in real time according to the change of the signal, has high pertinence, can monitor the early gas invasion risk in drilling fluid in time, has high timeliness and reliability, is suitable for early overflow monitoring under different working conditions, and has better practicability.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention, without limitation to the invention. In the drawings:
FIG. 1 is a schematic diagram of an apparatus for monitoring early well overflow according to an embodiment of the invention;
FIG. 2 is a schematic diagram showing a structural plan view of a monitoring device for early well overflow and an internal structure of a data acquisition device according to an embodiment of the present invention;
FIG. 3 (a) is a diagram showing an example of signals before filtering treatment of the early drilling overflow monitoring device according to an embodiment of the present invention;
FIG. 3 (b) is a diagram showing an exemplary filtered signal of the early drilling overflow monitoring device according to an embodiment of the present invention;
FIG. 4 is a frequency-dependent gas-containing rate correlation data for an early-stage drilling overflow monitoring device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a Doppler signal sensor horizontal layout of a monitoring device for early well overflow provided by an embodiment of the invention;
FIG. 6 is a schematic diagram of a vertical layout of Doppler signal sensors of an apparatus for monitoring early well overflow according to an embodiment of the invention;
FIG. 7 is a flow chart of a method for monitoring early drilling overflow according to another embodiment of the invention;
In the figure: 1. the well bore, 2, the underground monitoring device nipple joint, 3, the drilling rod, 41, the Doppler signal generator, 42, the Doppler signal receiver, 5, the built-in space groove, 6, the cable conductor guide hole, 7, the cable conductor protective housing, 81, the lithium battery, 82, the data acquisition module, 83, the data uploading module, 9, the cable conductor, 101, the ground signal receiving device, 102, the data transmission line, 103 and the Doppler signal monitoring system.
Detailed Description
The following will explain the embodiments of the present invention in detail with reference to the drawings and examples, so that the practitioner of the present invention can fully understand how to apply the technical means to solve the technical problems, achieve the implementation process of the technical effects, and implement the present invention according to the implementation process. It should be noted that, as long as no conflict is formed, each embodiment of the present invention and each feature of each embodiment may be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.
Although a flowchart depicts operations as a sequential process, many of the operations can be performed in parallel, concurrently, or at the same time. The order of the operations may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figures. The processes may correspond to methods, functions, procedures, subroutines, and the like.
The computer device includes a user device and a network device. Wherein the user equipment or client includes, but is not limited to, a computer, a smart phone, a PDA, etc.; network devices include, but are not limited to, a single network server, a server group of multiple network servers, or a cloud based cloud computing consisting of a large number of computers or network servers. The computer device may operate alone to implement the invention, or may access a network and implement the invention through interoperation with other computer devices in the network. The network in which the computer device is located includes, but is not limited to, the internet, a wide area network, a metropolitan area network, a local area network, a VPN network, and the like.
The terms "first," "second," and the like may be used herein to describe various elements, but these elements should not be limited by these terms, and these terms are used merely to distinguish one element from another. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. 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" and/or "comprising," 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, integers, steps, operations, elements, components, and/or groups thereof.
Well kick accidents easily occur in the offshore oil development process, and the safety and timeliness of drilling are seriously affected; the method has the advantages of early discovery of the kick in the drilling process and very important significance for gas well and deep water drilling operation.
Most current kick monitoring methods applied in the field of drilling operations rely on measurement data provided by a comprehensive logging tool, including: outlet flow, total pool volume of drilling fluid, pump pressure, pump stroke, hook load, drilling fluid outlet density, etc. The measurement of these parameters is done on top of the wellhead, so if a kick occurs, which is already the kick-up period, the formation fluid that invades the wellbore will reach the wellhead soon, monitoring for time-lapse delays, and the practicality is poor. For example, the intelligent judgment device for the drilling fluid quantity and the intelligent overflow and lost circulation early warning system proposed by the patent document CN204532178U cannot perform real-time early warning at the initial overflow stage of flow data recorded on the wellhead injection and discharge pipes, and lack real-time monitoring effect, and overflow recognition is performed only by monitoring the change of the drilling fluid quantity at the wellhead, which is a kick-up period. The device for monitoring the surface of early overflow leakage of drilling provided by patent document CN103277089A collects the flow of an inlet and outlet, the bit pressure, the rotating speed of a drilling disc, the torque of the drilling disc, the liquid level of a slurry pool, the pressure of a casing pipe and the pressure of a vertical pipe, and calculates and judges the accident probability by analyzing the data and comparing the data with an event model and a well kick model. The scheme is only used as a method for monitoring the kick by ground data, lacks of real-time performance and early warning on overflow, the design early warning accuracy depends on the data precision of a kick leakage model database, a judgment result is a probability event, the reliability is defective, in addition, the scheme is mainly used for monitoring the ground data and has postponement, if the alarm is not timely, the blowout accident is inevitably occurred, the consequence is not envisaged, and the requirement on processing measures is extremely high; in addition, the identification accuracy degree depends on a large amount of kick data as a basis, and the accuracy is not enough; according to the device and the method for monitoring the overflow of the shaft in the early stage, which are disclosed in the patent document CN104632198A, the measuring device is arranged in the middle of the shaft, so that the device is easy to be damaged by rock debris impact, the ascending height of the overflow after invading an annular space cannot be monitored in real time, and the time for the overflow to ascend to a wellhead cannot be estimated.
Therefore, technologies and methods capable of accurately and real-timely monitoring the underground dynamic overflow risk are urgently needed at present, and oil gas provides a foundation for realizing safe and efficient development of resources.
In order to overcome the problems of distortion and hysteresis of monitoring results of a conventional monitoring method and make up for the defects of the conventional monitoring method, the invention provides a monitoring device and a monitoring method for early drilling overflow, wherein the device is used for non-contact measurement by using a sensor, and the sensor is arranged close to the outer wall of a water-proof pipe and is not placed in drilling fluid, so that drilling equipment is not damaged; the condition of the invasion gas in the marine riser is monitored in real time according to the change of Doppler signals, the marine riser is not influenced by drilling working conditions, the layout form is flexible, the early gas invasion condition can be monitored well, early warning and data support can be provided in time, the gas invasion damage is reduced, and the development process of assistance is assisted.
The structural components, connection modes and functional principles of the device according to the embodiment of the present invention will be described in detail below based on the drawings. Although the logical order of operations are depicted in the context of describing the principles of operation of the apparatus, in some cases the operations depicted or described may be performed in a different order than is shown or described herein.
Example 1
FIG. 1 is a schematic structural view of an early well overflow monitoring device according to an embodiment of the present invention, and referring to FIG. 1, the device includes a downhole monitoring device and a surface monitoring system communicatively connected to the downhole monitoring device;
the downhole monitoring device includes: the underground monitoring device comprises a nipple 2, a Doppler signal generator 41, a Doppler signal receiver 42, a data acquisition module 82 and a data uploading module 83;
the downhole monitoring device nipple is wound on the outer side of the drill rod 3, and the Doppler signal generator and the Doppler signal receiver are tightly attached to the outer side of the downhole monitoring device nipple and are used for measuring the flowing state of fluid in an annulus by using the Doppler ultrasonic effect;
The underground monitoring device nipple is provided with a built-in space groove 5, and the data acquisition module and the data uploading module are arranged in the built-in space groove;
The Doppler signal receiver receives the ultrasonic reflected signal, and the data acquisition module carries out filtering processing on the received Doppler signal to obtain frequency variation characteristic data of the ultrasonic reflected signal;
the ground monitoring system comprises a ground signal receiving device 101 and a Doppler signal monitoring system 103 which are in communication connection;
the ground signal receiving device is used for receiving the frequency-varying characteristic data of the reflected signals from the data uploading module;
The Doppler signal monitoring device is used for analyzing the frequency-varying characteristic data of the reflected signals, determining the gas content by combining the frequency-varying-gas content associated data, and judging the gas invasion risk condition;
The ground signal receiving device 101 is connected with the Doppler signal monitoring system 103 through a data transmission line 102.
The monitoring device provided by the embodiment of the invention comprises an underground monitoring device, and can judge whether overflow invasion exists or not by collecting Doppler signals in real time at the early stage of overflow invasion into a shaft and analyzing the change characteristics of the signals to calculate the annular gas content, and particularly analyze the change rule of the underground Doppler signals, and can recognize early overflow and overflow upward-return conditions by calculating the annular cross section gas content and uploading data in real time.
According to the embodiment of the invention, the underground monitoring device is arranged on the outer surface of the drill rod, so that rock debris impact and drilling fluid erosion can be effectively reduced, the probability of inaccurate data caused by device damage can be avoided to a certain extent, and meanwhile, the equipment maintenance and replacement cost is reduced.
In an alternative embodiment, the frequency-gas-content-related data is determined through a gas-content monitoring experiment, gas is injected into the drilling fluid in the set simulation shaft device by using the gas pump device based on different gas injection speeds, and the corresponding Doppler signal frequency-dependent characteristic is acquired by using the underground monitoring device and recorded in association with the gas injection speed, so that the frequency-gas-content-related data is used as the frequency-content-related data for being called in the actual monitoring process.
FIG. 2 is a schematic diagram showing a structural plan view of a monitoring device for early well overflow and an internal structure of a data acquisition device according to an embodiment of the present invention; in the preferred embodiment, as shown in fig. 2, the doppler signal generator and the doppler signal receiver are on the same line, and the line between them is installed at a set angle a to the wellbore.
In an alternative embodiment, the doppler signal generator 41 and the doppler signal receiver 42 are installed outside the downhole monitoring device nipple 2 and on an extension line, where the installation angles of the doppler signal generator 41 and the doppler signal receiver 42 are respectively installed at an angle of 45 ° relative to the wellbore, for example, the generator 41 and the receiver 42 may be installed at an angle of 45 ° (the generator 45 °, the receiver-45 °) relative to the wellbore, so that the signal is emitted in a direction of 45 ° to facilitate signal transceiving. The Doppler signal generator 41 is connected with the Doppler signal receiver 42, and the connecting wire is provided with a cable protective shell 7 for preventing the connecting wire from being damaged by fluid erosion or rock debris impact.
The Doppler signal receiver 42 is communicated with the built-in space groove 5 of the underground monitoring device nipple 2 through a cable guide hole 6, and the cable 9 can connect the Doppler signal receiver 42 with the data acquisition module 82; the data acquisition module 82 performs filtering processing on the received doppler signal and sends the result to the data uploading module 83.
The Doppler signal generator 41 emits ultrasonic waves of a fixed frequency to the drilling fluid flowing in the annulus, and when encountering solid-phase particles (cuttings) and bubbles in the drilling fluid, reflected waves occur, and the emission frequency is deviated; and this deviation is directly proportional to the speed of the reflecting material encountered. The Doppler signal receiver 42 receives the reflected wave, and then carries out filtering signal processing through the data acquisition module 82, and then the Doppler signal monitoring system 103 carries out spectrum analysis, so that the speed of the reflector in the section of the water-proof pipe can be calculated analytically, and because the reflection speed of the stratum fluid is inconsistent with that of the fluid in the well bore, whether the fluid invades or not can be distinguished according to the reflection speed, namely, the early overflow condition can be identified.
The data acquisition module carries out filtering treatment on the obtained ultrasonic reflection signals, a low-pass filter is adopted to eliminate high-frequency data, a data concentration area is reserved, the frequency variation characteristics of the ultrasonic reflection signals corresponding to the current drilling fluid can be conveniently analyzed, and signals before and after the filtering treatment are shown in fig. 3 (a) and 3 (b);
Uploading data, namely uploading signal frequency-change characteristic data obtained through underground processing to a ground monitoring system through a data uploading module, receiving the signal frequency-change characteristic data by a ground signal receiving device, transmitting the signal frequency-change characteristic data to a Doppler signal monitoring system, and determining the gas-containing rate condition of the current drilling fluid based on the signal frequency-change characteristic data and frequency-gas-containing rate associated data;
Normally, the reflected signal is generated by solid phase particles in the drilling fluid, but once gas invasion occurs, the bubbles become the main source of the doppler signal. As the gas content increases or the gas volume expands, the doppler signal will undergo a significant frequency shift, which is used to monitor the presence or magnitude of bubbles and gas content, and thereby further monitor the occurrence or magnitude of gas intrusion. Referring to fig. 4, the application principle is: in the process of invasion of stratum gas into a shaft, the content of the gas in drilling fluid is continuously increased, the signal attenuation is increased, and the intensity of a signal received by an ultrasonic Doppler signal receiver is also reduced;
in practice, in a preferred embodiment, the final doppler frequency change received by the doppler signal receiver can be determined according to the following equation:
Wherein f 1 denotes the emitted ultrasonic frequency; f 3 denotes the received ultrasonic frequency; v represents the movement velocity of the particles in the drilling fluid; alpha represents the included angle between the ultrasonic beam and the axis of the tube; c represents the speed of sound in the fluid.
And a monitoring and early warning step, wherein if the determined gas content reaches a set condition, alarm information is output for continuous monitoring, otherwise, the associated signal frequency change characteristic data and the gas content are recorded for continuous monitoring.
The downhole monitoring device measures the fluid flow state inside the annulus by using the Doppler ultrasonic effect. The principle is as follows: after gas invasion, the movement of bubbles in the drilling fluid in the annulus can lead to Doppler frequency shift of sound waves, ultrasonic waves are reflected on the frequency change characteristics of the drilling fluid containing the bubbles through filtering, after gas invasion, the content of the gas in the annulus is continuously increased, along with the increase of the bubbles, the reflection efficiency of signals is reduced, the intensity of signals received by the Doppler signal receiver 42 is reduced, and whether gas invasion occurs is judged according to the relation between Doppler signals and section gas content signals.
Further, in an alternative embodiment, the doppler signal generator is connected to the doppler signal receiver through a cable, and the connecting wire is provided with a cable protective shell, so as to prevent the connecting wire from being damaged by fluid erosion or rock debris impact.
Preferably, in one embodiment, a cable guide hole is arranged between the Doppler signal receiver 42 and the built-in space slot of the downhole monitoring device nipple 2, and the Doppler signal receiver 42 is connected with the data acquisition module 82 through the cable 9.
Furthermore, the underground monitoring device is arranged on the outer surface of the drill rod, so that overflow monitoring can be conveniently realized according to different flexible layout conditions of the drill rod device, wherein the horizontal layout with the same depth can improve the monitoring accuracy, further improve the accuracy of the monitoring result, and realize reliable early overflow early warning, as shown in fig. 5.
Therefore, in a preferred embodiment, one or more sets of doppler signal generators and doppler signal receivers are disposed outside the sub of the downhole monitoring device at the same depth, for example, the sets of doppler signal generators and doppler signal receivers may be disposed in a para-position, tri-ring, or axial layout manner according to the requirement.
In practical application, the data acquisition module performs filtering processing on the acquired ultrasonic reflection signals, and a low-pass filter is adopted to eliminate a high-frequency data retention data set area and is used for a Doppler signal monitoring system to analyze the frequency variation characteristics of ultrasonic reflection signals corresponding to the current drilling fluid.
In an alternative embodiment, the doppler signal monitoring system may determine the final doppler frequency change received by the doppler signal receiver according to the following equation:
Wherein f 1 denotes the emitted ultrasonic frequency; f 3 denotes the received ultrasonic frequency; v represents the movement velocity of the particles in the drilling fluid; alpha represents the included angle between the ultrasonic beam and the axis of the tube; c represents the speed of sound in the fluid.
Further, in an alternative embodiment, the Doppler signal monitoring system is further configured to perform a spectral analysis on the received ultrasonic reflected signal, analyze and calculate a velocity of the reflector within the cross section of the riser, identify a fluid invasion condition based on a difference in the reflected velocities of the formation fluid and the fluid in the wellbore, and identify an early flooding condition based on the reflected velocities.
Example two
The monitoring device for the early drilling overflow provided by the embodiment of the invention comprises an underground monitoring device and a ground monitoring system in communication connection with the underground monitoring device;
the downhole monitoring device includes: the underground monitoring device comprises a nipple, a Doppler signal generator, a Doppler signal receiver, a data acquisition module and a data uploading module;
The downhole monitoring device nipple is wound on the outer side of the drill rod, and the Doppler signal generator and the Doppler signal receiver are arranged on the outer side of the downhole monitoring device nipple and are used for measuring the fluid flow state in the annulus by using the Doppler ultrasonic effect;
the underground monitoring device nipple is provided with a built-in space groove, and the data acquisition module and the data uploading module are arranged in the built-in space groove;
the Doppler signal receiver receives the ultrasonic reflected signal, and the data acquisition module carries out filtering processing on the received Doppler signal to obtain frequency-variant characteristic data of the reflected signal;
the ground monitoring system comprises a ground signal receiving device and a Doppler signal monitoring system which are in communication connection;
the ground signal receiving device is used for receiving the frequency-varying characteristic data of the reflected signals from the data uploading module;
the Doppler signal monitoring device is used for analyzing the frequency-varying characteristic data of the reflected signals, determining the gas content by combining the frequency-varying-gas content associated data, and judging the gas invasion risk condition.
According to the embodiment of the invention, the underground monitoring device is arranged on the outer surface of the drill rod, and overflow monitoring is conveniently realized according to different flexible layout adjustment conditions of the drill rod device, wherein the vertical layout can realize a multi-section monitoring effect, and the flow rule of overflow rising is clarified.
In a preferred embodiment, one or more downhole monitoring device pup joints are vertically arranged outside the drill pipes with different depths, and each downhole monitoring device pup joint comprises a Doppler signal generator, a Doppler signal receiver, a built-in space slot, a data acquisition module and a data uploading module, as shown in fig. 6. The distribution condition of annulus gas ratios of different well depths is identified through a vertical layout setting device, so that underground multi-depth comprehensive synchronous monitoring is realized; the distance between the overflow upper liquid level and the overflow lower liquid level can be effectively quantitatively analyzed, and the overflow volume can be quantitatively estimated.
Example III
The monitoring device for the early drilling overflow provided by the embodiment of the invention comprises an underground monitoring device and a ground monitoring system in communication connection with the underground monitoring device;
the downhole monitoring device includes: the underground monitoring device comprises a nipple, a Doppler signal generator, a Doppler signal receiver, a data acquisition module and a data uploading module;
The downhole monitoring device nipple is wound on the outer side of the drill rod, and the Doppler signal generator and the Doppler signal receiver are arranged on the outer side of the downhole monitoring device nipple and are used for measuring the fluid flow state in the annulus by using the Doppler ultrasonic effect;
the underground monitoring device nipple is provided with a built-in space groove, and the data acquisition module and the data uploading module are arranged in the built-in space groove;
the Doppler signal receiver receives the ultrasonic reflected signal, and the data acquisition module carries out filtering processing on the received Doppler signal to obtain frequency-variant characteristic data of the reflected signal;
the ground monitoring system comprises a ground signal receiving device and a Doppler signal monitoring system which are in communication connection;
the ground signal receiving device is used for receiving the frequency-varying characteristic data of the reflected signals from the data uploading module;
the Doppler signal monitoring device is used for analyzing the frequency-varying characteristic data of the reflected signals, determining the gas content by combining the frequency-varying-gas content associated data, and judging the gas invasion risk condition.
According to the embodiment of the invention, the underground monitoring device is arranged on the outer surface of the drill rod, overflow monitoring is conveniently realized according to different flexible layout conditions of the drill rod device, for example, two layout modes can be adopted simultaneously, so that the flow rule of overflow rising can be clarified simultaneously under the condition of improving accuracy, the distance between the overflow upper liquid level and the overflow lower liquid level is further analyzed, the overflow volume is quantitatively estimated, and more comprehensive data information is provided for a ground monitoring system.
In the alternative embodiment, one or more underground monitoring device pup joints are vertically arranged outside the drill rods with different depths, and each underground monitoring device pup joint comprises a Doppler signal generator, a Doppler signal receiver, a built-in space groove, a data acquisition module and a data uploading module. The distribution condition of annulus gas ratios of different well depths is identified through a vertical layout setting device, so that underground multi-depth comprehensive synchronous monitoring is realized; the distance between the overflow upper liquid level and the overflow lower liquid level can be effectively quantitatively analyzed, and the overflow volume is quantitatively estimated;
One or more sets of Doppler signal generators and Doppler signal receivers are arranged on the outer side of the short section of each depth underground monitoring device, for example, the Doppler signal generators and the Doppler signal receivers can be arranged in a counterpoint layout, a tricyclic layout or an axis layout mode according to requirements.
In use, ultrasonic waves of a fixed frequency are emitted by the Doppler signal generator 41 into the drilling fluid flowing in the annulus, and when a reflective material in the drilling fluid, such as solid particles (cuttings) or bubbles, is encountered, the reflected wave will occur, and the emission frequency will have been deviated to an extent that is directly proportional to the velocity of the reflective material encountered.
The reflected wave is received by the doppler signal receiver 42, and then subjected to signal processing, spectrum analysis, and the like, to calculate the velocity of the reflecting substance in the cross section of the riser.
By adopting the monitoring device for the early drilling overflow, disclosed by the embodiment of the invention, the underground overflow condition can be judged through the annulus gas content uploaded in real time while drilling, so that the monitoring while drilling, early warning and dynamic monitoring of overflow well killing of the underground overflow can be realized, the key technology of drilling blowout prevention can be mastered, and the safe and efficient development of oil and gas resources can be finally realized; compared with other overflow monitoring equipment or technology, the scheme provided by the invention has at least the following advantages:
1. the non-contact measurement is adopted, so that the drilling equipment is not damaged;
2. The installation and the configuration are convenient and quick, and normal drilling operation is not affected;
3. The device is suitable for various drilling working conditions, and can monitor the gas content in the annulus of the marine riser well no matter in a circulating drilling or non-circulating static state.
4. The monitoring function is highly targeted, the gas invasion condition can be well monitored, the horizontal layout of the sensor can be customized according to requirements, and the measuring error of the same section of the annular space is reduced.
5. The vertical layout can be arranged for multi-section monitoring, the change of the rising height of the annular gas content of the shaft is monitored in real time, and the overflow volume is estimated quantitatively.
In the early drilling overflow monitoring device provided by the embodiment of the invention, each module or unit structure can independently or in combination operate according to the actual signal receiving and transmitting requirements and the data processing requirements so as to realize corresponding technical effects.
Example IV
The device is described in detail in the embodiments disclosed in the invention, and based on other aspects of the device in any one or more embodiments, the invention further provides a method for monitoring early drilling overflow, which is applied to the device for monitoring early drilling overflow in any one or more embodiments. Specific examples are given below for details.
Specifically, fig. 7 shows a schematic flow chart of a method for monitoring early drilling overflow provided in an embodiment of the invention, and as shown in fig. 7, the method includes:
The method comprises the steps of setting a device, namely mounting a short joint of an underground monitoring device to the outer side of a drill rod with a required depth, setting a Doppler signal generator and a Doppler signal receiver on the outer side of the short joint of the underground monitoring device, setting a data acquisition module, a battery and a data uploading module in a built-in space groove of the short joint of the underground monitoring device, and establishing communication connection among the Doppler signal receiver, the data acquisition module and a ground monitoring system;
A signal acquisition step, starting an underground monitoring device, enabling a Doppler signal generator to continuously emit ultrasonic waves towards drilling fluid in annulus, and continuously acquiring ultrasonic reflected signals by using a Doppler signal receiver;
A signal processing step, wherein the data acquisition module carries out filtering processing on the obtained ultrasonic reflection signals, a low-pass filter is adopted to eliminate high-frequency data, a data concentration area is reserved, so that the frequency change characteristics of the ultrasonic reflection signals corresponding to the current drilling fluid can be analyzed conveniently, and the signals before and after the filtering processing are shown in fig. 3 (a) and 3 (b);
And uploading data, namely uploading signal frequency-change characteristic data obtained through underground processing to a ground monitoring system through a data uploading module, receiving the signal frequency-change characteristic data by a ground signal receiving device, transmitting the signal frequency-change characteristic data to a Doppler signal monitoring system, and determining the gas-containing rate condition of the current drilling fluid based on the signal frequency-change characteristic data and the frequency-change-gas-containing rate associated data.
Normally, the reflected signal is generated by solid phase particles in the drilling fluid, but once gas invasion occurs, the bubbles become the main source of the doppler signal. As the gas content increases or the gas volume expands, the doppler signal will undergo a significant frequency shift, which is used to monitor the presence or magnitude of bubbles and gas content, and thereby further monitor the occurrence or magnitude of gas intrusion. Referring to fig. 4, the principle is that the content of the gas in the drilling fluid is continuously increased during the process of invasion of the stratum gas into the well bore, the signal attenuation is increased, and the intensity of the signal received by the ultrasonic Doppler signal receiver is also reduced.
In practice, in a preferred embodiment, the final doppler frequency change received by the doppler signal receiver can be determined according to the following equation:
Wherein f 1 denotes the emitted ultrasonic frequency; f 3 denotes the received ultrasonic frequency; v represents the movement speed of particles in the drilling fluid; alpha represents the included angle between the ultrasonic beam and the axis of the tube; c represents the speed of sound in the fluid.
And a monitoring and early warning step, wherein if the determined gas content reaches a set condition, alarm information is output for continuous monitoring, otherwise, the associated signal frequency change characteristic data and the gas content are recorded for continuous monitoring.
The invention provides a monitoring method for early drilling overflow, which aims to solve the problems of distortion and hysteresis of monitoring results of a conventional monitoring method and make up for the defects of the conventional monitoring method; the underground monitoring device measures the flow state of fluid in the annulus by using the Doppler ultrasonic effect, monitors the gas content in drilling fluid in real time, then collects signal data and sends the signal data to the ground, and the Doppler signal monitoring system analyzes and processes the received signal to perform early warning and alarming.
The underground monitoring device measures the fluid flow state in the annulus by using the Doppler ultrasonic effect, and the monitoring principle is as follows: after gas invasion, the movement of bubbles in the drilling fluid in the annulus can lead to Doppler frequency shift of sound waves, and the frequency change characteristics of ultrasonic waves in the drilling fluid containing the bubbles are reflected through filtering to obtain the corresponding relation between the gas content and the sound wave frequency change, so that the gas content in the drilling fluid is monitored in real time.
And then collecting signal data, sending the signal data to the ground, analyzing and processing the frequency-dependent characteristic of the received signal by a ground Doppler signal monitoring system, determining the gas content condition, and carrying out early warning and alarming.
In an alternative embodiment, the frequency-gas-content-rate-related data is determined through a gas-content monitoring experiment, gas is injected into drilling fluid in the set simulation shaft device by using gas pump equipment based on different gas injection speeds, and a downhole monitoring device is used for acquiring corresponding Doppler signal frequency-change characteristics and recording the gas injection speed-related data as the frequency-gas-content-rate-related data for calling in an actual monitoring process.
Wherein, the underground monitoring device who adopts includes: the underground monitoring device comprises a nipple 2, a Doppler signal generator 41, a Doppler signal receiver 42, a data acquisition module 82 and a data uploading module 83;
The underground monitoring device nipple 2 is a round steel pipe with internal threads on the upper part and external threads on the lower part, the upper end and the lower end of the underground monitoring device nipple 2 are respectively in threaded connection with a drill rod, a space groove 5 is arranged at the upper end and is used as a placement space for the data acquisition module 82 and the data uploading module 83, and the underground monitoring device nipple 2 is provided with a lithium battery 81 for supplying power to the data acquisition module 82 and the data uploading module 83.
The Doppler signal generator 41 and the Doppler signal receiver 42 are arranged outside the underground monitoring device nipple 2 and are positioned on an extension line, the installation angle of the Doppler signal generator 41 and the Doppler signal receiver 42 is 45 degrees with a shaft, the Doppler signal generator 41 is connected with the Doppler signal receiver 42, and the cable protective shell 7 is arranged on the connecting line to prevent the connecting line from being damaged by fluid erosion or rock debris impact;
the Doppler signal receiver 42 is communicated with the built-in space groove 5 of the underground monitoring device nipple 2 through a cable guide hole 6, and the cable 9 can connect the Doppler signal receiver 42 with the data acquisition module 82;
the data acquisition module 82 performs filtering processing on the received Doppler signals and sends the Doppler signals to the data uploading module 83;
the Doppler signal generator 41 emits ultrasonic waves of a fixed frequency to the drilling fluid flowing in the annulus, and when encountering solid-phase particles (cuttings) and bubbles in the drilling fluid, reflected waves occur, and the emission frequency is deviated; and this deviation is directly proportional to the speed of the reflecting material encountered. The Doppler signal receiver 42 receives the reflected wave, and then calculates the velocity of the reflector in the section of the riser through signal processing, spectral analysis, and the like.
In practical application, the ground monitoring system comprises: a ground signal receiving apparatus 101 and a Doppler signal monitoring system 103;
the Doppler signal monitoring system 103 monitors the ultrasonic Doppler signal transmitted underground in real time, reflects the frequency variation characteristics of ultrasonic waves in the drilling fluid containing bubbles through filtering, and obtains the corresponding relation between the gas content and the acoustic frequency variation, so that the gas content in the drilling fluid is monitored in real time.
After the gas intrusion occurs, the content of the gas in the annulus increases continuously, and as the bubbles increase, the signal reflection efficiency decreases, the signal strength received by the doppler signal receiver 42 decreases, and whether the gas intrusion occurs is determined according to the relationship between the doppler signal and the section gas content signal.
In an embodiment, the data acquisition module performs filtering processing on the obtained ultrasonic reflection signal, and a low-pass filter is adopted to eliminate a high-frequency data retention data concentration area for the Doppler signal monitoring system to analyze the frequency variation characteristics of the ultrasonic reflection signal corresponding to the current drilling fluid.
In an alternative embodiment, the final Doppler frequency shift of the ultrasound reflected signal is determined by the Doppler signal monitoring system as follows:
Wherein f 1 denotes the emitted ultrasonic frequency; f 3 denotes the received ultrasonic frequency; v represents the movement velocity of the particles in the drilling fluid; alpha represents the included angle between the ultrasonic beam and the axis of the tube; c represents the speed of sound in the fluid.
Preferably, in one embodiment, the Doppler signal monitoring system performs a spectral analysis on the received ultrasonic reflected signal, analyzes and calculates the velocity of the reflector in the section of the riser, and identifies the fluid invasion condition and the early overflow condition based on the difference between the reflected velocities of the formation fluid and the fluid in the well bore and the reflected velocity.
For the foregoing method embodiments, for simplicity of explanation, the methodologies are shown as a series of acts, but one of ordinary skill in the art will appreciate that the present invention is not limited by the order of acts, as some steps may, in accordance with the present invention, occur in other orders or concurrently. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present invention.
It should be noted that in other embodiments of the present invention, the method may also be used to obtain a new early drilling overflow monitoring method by combining one or more of the above embodiments to achieve advanced monitoring and remediation of downhole gas invasion overflows.
It should be noted that, based on the method in any one or more of the foregoing embodiments of the present invention, the present invention further provides a storage medium, where a program code is stored on the storage medium, where the program code can implement the method in any one or more of the foregoing embodiments, and when the program code is executed by an operating system, the method can implement the method for monitoring early drilling overflow as described above.
It is to be understood that the disclosed embodiments are not limited to the specific structures, process steps, or materials disclosed herein, but are intended to extend to equivalents of these features as would be understood by one of ordinary skill in the relevant arts. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "one embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
Although the embodiments of the present invention are described above, the embodiments are only used for facilitating understanding of the present invention, and are not intended to limit the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the appended claims.
Claims (17)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310533376.8A CN118933742A (en) | 2023-05-12 | 2023-05-12 | A monitoring device and method for early drilling overflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310533376.8A CN118933742A (en) | 2023-05-12 | 2023-05-12 | A monitoring device and method for early drilling overflow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118933742A true CN118933742A (en) | 2024-11-12 |
Family
ID=93357257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310533376.8A Pending CN118933742A (en) | 2023-05-12 | 2023-05-12 | A monitoring device and method for early drilling overflow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118933742A (en) |
-
2023
- 2023-05-12 CN CN202310533376.8A patent/CN118933742A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103291284B (en) | Based on the pit shaft gas cut early monitoring method measured with brill annular pressure and device | |
| US4733232A (en) | Method and apparatus for borehole fluid influx detection | |
| CN104712320B (en) | Gas cut early monitoring device and method in drilling process | |
| US4733233A (en) | Method and apparatus for borehole fluid influx detection | |
| CN106194162B (en) | Gas intrusion monitoring device and monitoring method based on annular pressure difference measurement while drilling | |
| CN109386279B (en) | Shaft gas invasion detection method and system | |
| CN107575212B (en) | Ultrasonic gas invasion while drilling monitoring device and method | |
| CN113323653B (en) | Early warning method and device for overflow of deep water drilling | |
| CN103061753A (en) | Device for measuring downhole flow while drilling and monitoring early overflow | |
| CN107060737B (en) | While-drilling gas invasion simulation experiment device and experiment method | |
| CN102587898B (en) | Method and device for detecting gas content of mixed fluid under while drilling condition | |
| CN111364979B (en) | Underground gas invasion monitoring system based on ultrasonic waves | |
| CN104453842B (en) | Oil gas well down-hole fault diagnosis system and method | |
| CN107387066B (en) | A method for early detection of gas invasion in oil and gas drilling based on electrical impedance measurement | |
| CN107178362A (en) | A kind of oil/gas drilling gas cut early detection device based on impedance bioelectrical measurement | |
| CN114341462A (en) | Method for determining the position of a lowerable object in a wellbore | |
| CN112483074B (en) | A method and system for predicting gas invasion during drilling | |
| CN105804724B (en) | An ultrasonic liquid level monitoring device for petroleum drilling | |
| CA1218740A (en) | Method and apparatus for borehole fluid influx detection | |
| CN206694020U (en) | The device of gas cut is monitored in real time using the pressure wave signal of measurement while drilling instrument | |
| CN106801602A (en) | Using the method for the pressure wave signal real-time monitoring gas cut of measurement while drilling instrument | |
| US6540021B1 (en) | Method for detecting inflow of fluid in a well while drilling and implementing device | |
| CN118933742A (en) | A monitoring device and method for early drilling overflow | |
| CN204591261U (en) | A kind of oil drilling ultrasonic liquid level monitoring device | |
| CN107300690A (en) | A kind of cluster well inter-well distance measuring method |
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 |