CN117030471A - Intelligent starting pressure gradient test experimental device - Google Patents

Intelligent starting pressure gradient test experimental device Download PDF

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Publication number
CN117030471A
CN117030471A CN202310763282.XA CN202310763282A CN117030471A CN 117030471 A CN117030471 A CN 117030471A CN 202310763282 A CN202310763282 A CN 202310763282A CN 117030471 A CN117030471 A CN 117030471A
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pipeline
pressure
experimental device
dynamometer
test experimental
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CN202310763282.XA
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Chinese (zh)
Inventor
刘成
李洋冰
龚胜利
马立涛
柳雪青
张波
姜洋
黄英
陈博源
胡维强
邢艳
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CNOOC Energy Technology and Services Ltd
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CNOOC Energy Technology and Services Ltd
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Priority to CN202310763282.XA priority Critical patent/CN117030471A/en
Publication of CN117030471A publication Critical patent/CN117030471A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12—Pressure testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0061—Force sensors associated with industrial machines or actuators
    • G01L5/0076—Force sensors associated with manufacturing machines
    • G01L5/009—Force sensors associated with material gripping devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/0806—Details, e.g. sample holders, mounting samples for testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082—Investigating permeability by forcing a fluid through a sample
    • G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24—Earth materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The application discloses an intelligent starting pressure gradient test experimental device, wherein a liquid storage tank is connected with an inlet end of a core holder through a first pipeline, a peristaltic pump and a first pressure dynamometer are sequentially arranged on the first pipeline, and the first pressure dynamometer is arranged close to the inlet end of the core holder; the liquid measuring system comprises a weighing assembly, the weighing assembly is connected with the outlet end of the core holder through a pipeline IV and a pipeline III, a second pressure dynamometer is arranged on the pipeline III, and a gas-liquid separator is arranged on the pipeline IV; the back pressure automatic control pump is arranged on a pipeline IV, the back pressure automatic control pump is connected with the weighing assembly through a pipeline V, and a gas-liquid separator is arranged on the pipeline V. The first pressure dynamometer can detect the pressure of the inlet end of the core holder, the pressure of the outlet end of the core holder is recorded by the second pressure dynamometer, the pressure of the inlet end and the outlet end of the core holder can be obtained at the first time, and the follow-up experiment can be conveniently and quickly carried out.

Description

Intelligent starting pressure gradient test experimental device
Technical Field
The application relates to the technical field of pressure gradient experimental equipment, in particular to an intelligent starting pressure gradient test experimental device.
Background
In the exploitation process of the oil and gas reservoir, the change of stratum pressure can cause the corresponding change of parameters such as the mechanical property, the physical property and the like of the rock, thereby influencing the single-phase and multi-phase seepage characteristics of the rock. The initiation pressure gradient is an important parameter for reservoir development evaluation.
In order to further understand the pressure gradient experimental device in the prior art, the publication number is: chinese patent CN107676083a discloses an experimental method for determining a starting pressure gradient under low permeability reservoir formation conditions, the experimental method for determining a starting pressure gradient under low permeability reservoir formation conditions comprising: step 1, preparing a hypotonic rock sample; step 2, performing a dynamic high-temperature high-pressure water rock simulation test under the condition of low-permeability sample stratum fluid temperature and pressure, and recording fluid pressure and seepage velocity under different pressures; and 3, determining the starting pressure of the hypotonic rock sample according to the multiple groups of fluid pressure and seepage velocity values of the hypotonic rock sample, and obtaining the starting pressure of the hypotonic reservoir section according to the starting pressures of the multiple cores. Through exploring and analyzing, the patent has the following defects in actual use: the patent merely describes an experimental method in a general way, and the pressure of the inlet end and the outlet end of the core holder cannot be obtained at the first time, and the specification of the patent does not describe how to obtain the related pressure information.
Disclosure of Invention
The application aims to provide an intelligent starting pressure gradient test experimental device so as to solve the problems in the background technology.
In order to achieve the above purpose, the present application provides the following technical solutions:
an intelligent start-up pressure gradient test experimental apparatus, comprising:
the core holder is used for holding a core;
the liquid storage tank is connected with the inlet end of the core holder through a first pipeline, a peristaltic pump and a first pressure dynamometer are sequentially arranged on the first pipeline, and the first pressure dynamometer is arranged close to the inlet end of the core holder;
the liquid measuring system comprises a weighing assembly, wherein the weighing assembly is connected with the outlet end of the core holder through a pipeline IV and a pipeline III, a second pressure dynamometer is arranged on the pipeline III, and a gas-liquid separator is arranged on the pipeline IV;
the back pressure automatic control pump is arranged on the fourth pipeline, the back pressure automatic control pump is connected with the weighing assembly through a fifth pipeline, and a gas-liquid separator is arranged on the fifth pipeline.
Further, a pressure starting unit is arranged on the liquid storage tank, one end of the pressure starting unit is connected with the liquid storage tank, and the other end of the pressure starting unit is connected with the first pipeline at the downstream of the peristaltic pump.
Further, a gas outlet of the gas-liquid separator on the pipeline five is provided with a pipeline six, a third pressure dynamometer is arranged on the pipeline six, two branch pipes are arranged on the pipeline six at the downstream of the third pressure dynamometer, first valves are arranged on the two branch pipes, the branch pipes are connected with a piston cylinder, and second valves are arranged at the top end and the bottom end of the piston cylinder.
Further, a piston block is connected in a sliding manner in the piston cylinder, and piston rods are arranged at two ends of the piston block.
Further, a conveying pipe is arranged at the gas outlet of the gas-liquid separator on the fourth pipeline, a metering pipe is arranged at the tail end of the conveying pipe, a piston column is slidably arranged in the metering pipe, and a needle cylinder is arranged on the conveying pipe.
Further, an imaging unit is arranged above the metering tube.
Further, the inner diameter of the metering tube is 1-3mm, and the length of the metering tube is 200-250mm.
Further, the weighing assembly comprises a measuring cylinder and an electronic metering scale, the measuring cylinder is arranged above the electronic metering scale, and liquid outlets of the gas-liquid separators of the fourth pipeline and the fifth pipeline are connected with the measuring cylinder through pipelines.
Further, the air compressor is connected with the pipeline I at the upstream of the first pressure dynamometer through the pipeline II, a one-way valve is arranged at the upstream of the joint of the pipeline II and the pipeline I, and a pressure gauge is arranged on the pipeline II.
Further, a booster pump is further arranged on the second pipeline, and the pressure gauge is arranged between the air compressor and the booster pump.
In summary, the application has the technical effects and advantages that: compared with the prior art, the method has the advantages that after the core is vacuumized, the core is installed in the core holder, so that the pressure of the inlet end of the core holder can be detected through the first pressure dynamometer, the pressure of the outlet end of the core holder is recorded by the second pressure dynamometer, the pressure of the inlet and outlet ports of the core holder can be obtained at the first time, and the subsequent experiment can be conveniently and rapidly carried out.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an intelligent start-up pressure gradient test experimental apparatus according to an embodiment of the application;
fig. 2 is a schematic structural diagram of an intelligent start pressure gradient test experimental apparatus in a second embodiment of the application.
1, a core holder; 2. a first pressure gauge; 3. a liquid storage tank; 4. a peristaltic pump; 5. a pressure start unit; 6. a first pipeline; 7. an air compressor; 8. a pressure gauge; 9. a booster pump; 10. a one-way valve; 11. a second pipeline; 12. a third pipeline; 13. a second pressure gauge; 14. back pressure automatic control pump; 15. a fourth pipeline; 16. a fifth pipeline; 17. a gas-liquid separator; 18. a needle cylinder; 19. metering tube; 20. an image pickup unit; 21. a sixth pipeline; 22. a third pressure dynamometer; 23. a piston cylinder; 24. a piston block; 25. a piston rod; 26. a first valve; 27. a second valve; 28. a measuring cylinder; 29. an electronic weighing scale.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
Example 1
The embodiment provides an intelligent starting pressure gradient test experimental device, which is shown in fig. 1 and comprises a core holder 1, a liquid storage tank 3, a liquid measuring system and a back pressure automatic control pump 14. The core holder 1 is used for holding a core. The liquid storage tank 3 is connected with the inlet end of the core holder 1 through a first pipeline 6, a peristaltic pump 4 and a first pressure dynamometer 2 are sequentially arranged on the first pipeline 6, the first pressure dynamometer 2 is arranged close to the inlet end of the core holder 1, the first pressure dynamometer 2 is used for detecting the pressure of the inlet end of the core holder 1, the core is vacuumized, then stratum water is saturated, then the core saturated with the stratum water is installed in the core holder 1, and the core is pressurized and clamped. The liquid measuring system comprises a weighing assembly, the weighing assembly is connected with the outlet end of the core holder 1 through a pipeline IV 15 and a pipeline III 12, a second pressure dynamometer 13 is arranged on the pipeline III 12, and a gas-liquid separator 17 is arranged on the pipeline IV 15; the back pressure automatic control pump 14 is arranged on a pipeline IV 15, the back pressure automatic control pump 14 is connected with the weighing assembly through a pipeline V16, and a gas-liquid separator 17 is arranged on the pipeline V16.
Fluid flowing out from the outlet end of the core holder 1 enters the gas-liquid separator 17 through a pipeline IV 15, and then the fluid flows into the weighing assembly to be weighed; finally, the weighing assembly weighs the increased value of the fluid mass in a period of time, and the volume flow is reversely pushed by the fluid density according to the formula: v=m/ρ, where V is the volume, m is the added mass, ρ is the density. The first pressure gauge 2 can detect the pressure at the inlet end of the core holder 1, the pressure value is described as P1, the pressure at the outlet end of the core holder 1 is described by the second pressure gauge 13, and the pressure value is described as P2; the seepage process can be accurately and completely described by calibrating the test differential pressure P2-P1 and the corresponding flow in a plate, then different types of seepage starting pressure gradients and seepage equation function expressions are obtained, and the pressure gradient experiment can be performed by adopting the technology.
Further, a pressure starting unit 5 is arranged on the liquid storage tank 3, one end of the pressure starting unit 5 is connected with the liquid storage tank 3, and the other end of the pressure starting unit 5 is connected with a first pipeline 6 at the downstream of the peristaltic pump 4. The pressure start unit 5 may be a water pump for pumping the liquid in the liquid reservoir 3 into the first conduit 6 for delivery.
Further, a gas outlet of the gas-liquid separator 17 on the pipeline five 16 is provided with a pipeline six 21, a third pressure dynamometer 22 is arranged on the pipeline six 21, two branch pipes are arranged on the pipeline six 21 at the downstream of the third pressure dynamometer 22, a first valve 26 is arranged on each of the two branch pipes, the branch pipes are connected with the piston cylinder 23, and second valves 27 are arranged at the top end and the bottom end of the piston cylinder 23. Further, a piston block 24 is slidably connected to the piston cylinder 23, and piston rods 25 are disposed at both ends of the piston block 24, so that movement of the piston block 24 pushed by the gas can be observed. The gas-liquid separator 17 on the fifth pipeline 16 allows the separated gas to enter the piston cylinder 23 through the first valve 26, and when the two first valves 26 are opened each time, only one of the two first valves 26 can be opened, then the piston block 24 is pushed to slide by the gas entering the piston cylinder 23, and then the second valve 27 can be opened, so that the gas is discharged through the second valve 27. By adopting the above technique, the gas separated by the gas-liquid separator 17 on the pipe five 16 can be detected.
Further, a conveying pipe is arranged at the gas outlet of the gas-liquid separator 17 on the pipeline IV 15, a metering pipe 19 is arranged at the tail end of the conveying pipe, a piston column is arranged in the metering pipe 19 in a sliding mode, and a needle cylinder 18 is arranged on the conveying pipe. By adopting the above technique, the gas separated by the gas-liquid separator 17 on the fourth 15 of the pipe 19 can be measured. The gas entering the metering tube 19 can push the piston column to move, so that the gas output quantity can be judged according to the moving distance of the piston column, wherein the inner diameter of the metering tube 19 is 1-3mm, the length of the metering tube 19 is 200-250mm, and the image pickup unit 20 is arranged above the metering tube 19. The camera unit 20 is a camera through which the distance traveled by the piston rod within the metering cylinder 28 is observed in real time.
Further, the weighing assembly comprises a measuring cylinder 28 and an electronic weighing scale 29, the measuring cylinder 28 is arranged above the electronic weighing scale 29, and liquid outlets of the gas-liquid separators 17 of the fourth pipeline 15 and the fifth pipeline 16 are connected with the measuring cylinder 28 through pipelines.
The present embodiment is specifically used with reference to the following operations:
firstly, vacuumizing a rock core, then saturating stratum water, then installing the rock core saturated with the stratum water in a rock core holder 1, and pressurizing and compacting the rock core;
then, starting a peristaltic pump 4 and a pressure starting unit 5, enabling liquid in a liquid storage tank 3 to enter a core holder 1 through a first pipeline 6, and simultaneously enabling a first pressure dynamometer 2 to detect the pressure of an inlet end of the core holder 1, and recording the pressure value as P1;
secondly, the pressure at the outlet end of the core holder 1 is recorded by a second pressure dynamometer 13, and the pressure value is recorded as P2; simultaneously, fluid flowing out from the outlet end of the core holder 1 enters the gas-liquid separator 1717 through a pipeline IV 15, then the fluid flows into the measuring cylinder 28, and the gas mixed with the fluid enters the measuring tube 19;
finally, the electronic scale 29 weighs the increase in fluid mass over a period of time, and the volumetric flow is extrapolated from the fluid density according to the formula: v=m/ρ, where V is the volume, m is the added mass, ρ is the density.
Finally, the seepage process can be accurately and completely described by calibrating the test differential pressure P2-P1 and the corresponding flow in a plate, and then different types of seepage starting pressure gradients and seepage equation function expressions can be obtained.
In summary, compared with the prior art, in the present embodiment, after the core is vacuumized, the core is installed in the core holder 1, so that the pressure at the inlet end of the core holder 1 can be detected by the first pressure dynamometer 2, and the pressure at the outlet end of the core holder 1 is recorded by the second pressure dynamometer 13, so that the pressure at the inlet and outlet ports of the core holder 1 can be obtained at the first time in the present application, and thus, the subsequent experiments can be conveniently and rapidly performed.
Example two
The difference between this embodiment and embodiment 1 is shown in fig. 2: the embodiment further comprises an air compressor 7, wherein the air compressor 7 is connected with a first pipeline 6 at the upstream of the first pressure dynamometer 2 through a second pipeline 11, a one-way valve 10 is arranged at the upstream of the connection part of the second pipeline 11 and the first pipeline 6, and a pressure gauge 8 is arranged on the second pipeline 11. The check valve 10 is provided so that the fluid in the reservoir 3 does not flow back into the second conduit 11. The pressure gauge 8 is used for detecting the pressure in the second pipeline 11. Further, a booster pump 9 is further arranged on the second pipeline 11, and the pressure gauge 8 is arranged between the air compressor 7 and the booster pump 9. The booster pump 9 is used to increase the pressure.
Specifically, when the liquid in the liquid storage tank 3 enters the first pipeline 6, the liquid can be accelerated to stably flow into the core holder 1 through the cooperation of the air compressor 7 and the booster pump 9.
Standard parts used in the application can be purchased from the market, special-shaped parts can be customized according to the description of the specification and the drawings, the specific connection modes of all parts adopt conventional means such as mature bolts, rivets and welding in the prior art, the machinery, the parts and the equipment adopt conventional modes in the prior art, and the circuit connection adopts conventional connection modes in the prior art, so that details are not described in detail in the specification, and the application belongs to the prior art known to the person skilled in the art.
Finally, it should be noted that: the foregoing description of the preferred embodiments of the present application is not intended to be limiting, but rather, it will be apparent to those skilled in the art that the foregoing description of the preferred embodiments of the present application can be modified or equivalents can be substituted for some of the features thereof, and any modification, equivalent substitution, improvement or the like that is within the spirit and principles of the present application should be included in the scope of the present application.

Claims (10)

1. An intelligent start pressure gradient test experimental device, comprising:
the core holder is used for holding a core;
the liquid storage tank is connected with the inlet end of the core holder through a first pipeline, a peristaltic pump and a first pressure dynamometer are sequentially arranged on the first pipeline, and the first pressure dynamometer is arranged close to the inlet end of the core holder;
the liquid measuring system comprises a weighing assembly, wherein the weighing assembly is connected with the outlet end of the core holder through a pipeline IV and a pipeline III, a second pressure dynamometer is arranged on the pipeline III, and a gas-liquid separator is arranged on the pipeline IV;
the back pressure automatic control pump is arranged on the fourth pipeline, the back pressure automatic control pump is connected with the weighing assembly through a fifth pipeline, and a gas-liquid separator is arranged on the fifth pipeline.
2. The intelligent starting pressure gradient test experimental device according to claim 1, wherein a pressure starting unit is arranged on the liquid storage tank, one end of the pressure starting unit is connected with the liquid storage tank, and the other end of the pressure starting unit is connected with the first pipeline at the downstream of the peristaltic pump.
3. The intelligent start-up pressure gradient test experimental device according to claim 1, wherein a gas outlet of the gas-liquid separator on the pipeline five is provided with a pipeline six, a third pressure dynamometer is arranged on the pipeline six, two branch pipes are arranged on the pipeline six at the downstream of the third pressure dynamometer, first valves are arranged on the two branch pipes, the branch pipes are connected with a piston cylinder, and second valves are arranged at the top end and the bottom end of the piston cylinder.
4. The intelligent start pressure gradient test experimental device according to claim 3, wherein a piston block is slidably connected in the piston cylinder, and piston rods are arranged at two ends of the piston block.
5. The intelligent start-up pressure gradient test experimental device according to claim 1, wherein a conveying pipe is arranged at a gas outlet of the gas-liquid separator on the pipeline IV, a metering pipe is arranged at the tail end of the conveying pipe, a piston column is slidably arranged in the metering pipe, and a needle cylinder is arranged on the conveying pipe.
6. The intelligent start-up pressure gradient test experimental device according to claim 5, wherein a camera unit is arranged above the metering tube.
7. The intelligent start-up pressure gradient test experimental device according to claim 5 or 6, wherein the inner diameter of the metering tube is 1-3mm and the length is 200-250mm.
8. The intelligent start-up pressure gradient test experimental device according to claim 1, wherein the weighing assembly comprises a measuring cylinder and an electronic metering scale, the measuring cylinder is arranged above the electronic metering scale, and liquid outlets of gas-liquid separators of the fourth pipeline and the fifth pipeline are connected with the measuring cylinder through pipelines.
9. The intelligent start pressure gradient test experimental device according to claim 1, further comprising an air compressor, wherein the air compressor is connected with the pipeline I at the upstream of the first pressure dynamometer through a pipeline II, a one-way valve is arranged at the upstream of the connection part of the pipeline II and the pipeline I, and a pressure gauge is arranged on the pipeline II.
10. The intelligent start pressure gradient test experimental device according to claim 9, wherein a booster pump is further arranged on the second pipeline, and the pressure gauge is arranged between the air compressor and the booster pump.
CN202310763282.XA 2023-06-27 2023-06-27 Intelligent starting pressure gradient test experimental device Pending CN117030471A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310763282.XA CN117030471A (en) 2023-06-27 2023-06-27 Intelligent starting pressure gradient test experimental device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310763282.XA CN117030471A (en) 2023-06-27 2023-06-27 Intelligent starting pressure gradient test experimental device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117607005A (en) * 2024-01-23 2024-02-27 中国石油大学(华东) Method for measuring rock starting pressure gradient

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117607005A (en) * 2024-01-23 2024-02-27 中国石油大学(华东) Method for measuring rock starting pressure gradient
CN117607005B (en) * 2024-01-23 2024-04-12 中国石油大学(华东) Method for measuring rock starting pressure gradient

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