CN108049863A - A kind of drilling fluid chemosmosis pressure difference test device and test method - Google Patents
A kind of drilling fluid chemosmosis pressure difference test device and test method Download PDFInfo
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- CN108049863A CN108049863A CN201810027328.0A CN201810027328A CN108049863A CN 108049863 A CN108049863 A CN 108049863A CN 201810027328 A CN201810027328 A CN 201810027328A CN 108049863 A CN108049863 A CN 108049863A
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- mud stone
- core
- pressure difference
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The invention belongs to petroleum drilling technology fields, permeable pressure head for water flooding in simulated determination drilling fluid and mud shale designs, specifically disclose a kind of drilling fluid chemosmosis pressure difference test device, including core holding unit and the mud stone core barrel being placed in core holding unit, mud stone rock core is placed in mud stone core barrel, the cavity of core holding unit is divided into first chamber and second chamber by mud stone rock core；First chamber is connected with drilling fluid tank and vacuum pump, and second chamber is connected to vacuum pump and stratum water pot；First chamber is provided with first pressure detection device, and second chamber is provided with second pressure detection device；The present invention also provides a kind of test methods applied to above-mentioned drilling fluid chemosmosis pressure difference test device.Drilling fluid chemosmosis pressure difference test device and test method provided by the invention, can effectively simulated determination drilling fluid and stratum interstitial fluid chemosmosis pressure difference, reliable data are provided and are supported to improve drilling fluid inhibition and wellbore stability ability.
Description
Technical field
The present invention relates to petroleum drilling technology field more particularly to a kind of drilling fluid chemosmosis pressure difference test device and surveys
Method for testing.
Background technology
In Process of Oil Well Drilling, borehole well instability is to perplex a big problem of petroleum industrial circle, hole instability always
The speed, quality and cost of drilling well are drastically influenced, meanwhile, mud filtrate invasion can be caused to be caused into petroleum reservoir to reservoir
Pollution, adverse effect is brought to exploitation of oil-gas field.
It is many to influence the factor of borehole wall stability, such as formation lithology, tectonic stress, formation temperature, mud soak and oozes
Thoroughly etc..Permeable pressure head, that is, difference in chemical potential between drilling fluid and formation void fluid is the power of drilling fluid disengaging mud shale stratum
One of, due to inorganic ion of the drilling fluid generally between the gap fluid of mud shale stratum, anion, aquation cation and
The concentration of aquation anion etc. is there are difference, therefore there are difference in chemical potential, water and each component meetings between drilling fluid and gap fluid
The diffusive migration under the action of difference in chemical potential：When the chemical potential of water in drilling fluid and each component is higher than the chemical potential in pore-fluid
When, water and each component enter stratum under the action of chemical potential, trigger mud shale stratum hydration swelling, steady so as to be unfavorable for the borehole wall
It is fixed；Conversely, when the chemical potential of water in drilling fluid and each component is less than the chemical potential in pore-fluid, formation fluid will be to pit shaft
Diffusive migration, so as to be conducive to wellbore stability.
To prevent caving in for the borehole wall, in the early 1970s, the external borehole wall that first proposed water in oil emulsion drilling fluid
Stable mechanism-equilibrium of activation forms semi-permeable membrane between that is, hydrophilic, permeability is extremely low mud shale and oil base drilling fluid, can
With the concentration by suitably increasing inorganic salts in water phase, the activity of drilling fluid and water flooding is made to keep balance, increases drilling fluid
Inverse osmosis pressure difference prevents the water in oil base drilling fluid from migrating to stratum, prevents shale hydration from caving in so as to reach.Therefore supervise
Generated chemosmosis pressure difference between drilling fluid and mud shale is surveyed, can effectively judge pit shaft and ground intermediary water and wherein component
Diffusion and Transport, so as to for science be advantageously selected for wellbore stability, prevent the drilling fluid system and inorganic agent that cave in
Effective detection and evaluation method are provided.
Prior art discloses a kind of test device and test method for surveying Thief zone rock Test Liquid Permeability of Core, including rock
Sample clamping loading system, gas control loading system, fluid injection and drainage system and data collecting system, and pass through to saturated core
Liquid of the middle injection as permeating medium, simulation loading pore pressure and permeable pressure head, to obtain rock under pressure
Permeability.
Above-mentioned test device is only capable of carrying out analogue measurement to permeability of the rock under liquid effects, can not accurately measure brill
Generated permeable pressure head between drilling fluid and mud shale under well liquid and formation fluid collective effect can not also carry out water and other
Diffusive migration simulation of the component between drilling fluid and formation fluid；Due to carrying out simulation test, test data using single fluid
The selection to drilling fluid can not be applied directly to judge；And above-mentioned test device is complicated, it is troublesome in poeration.
The content of the invention
The present invention provides a kind of drilling fluid chemosmosis pressure difference test device, for simulated determination drilling fluid to mud shale
Chemosmosis pressure difference, provide reliable data supporting to improve drilling fluid inhibition and borehole wall stability.
To achieve the above object, the present invention uses following technical proposals：
A kind of drilling fluid chemosmosis pressure difference test device including core holding unit and is placed in the core holding unit
Mud stone core barrel is placed with mud stone rock core in the mud stone core barrel, which is characterized in that the mud stone rock core presss from both sides the rock core
The cavity of holder is divided into first chamber and second chamber；
The first chamber is connected with drilling fluid tank and vacuum pump, and the second chamber is connected to the vacuum pump and stratum
Water pot；
The first chamber is provided with first pressure detection device, and the second chamber is provided with second pressure detection dress
It puts.
Preferably, the first chamber connects the stratum water pot.
Preferably, the drilling fluid tank is connected with the first inert gas tank, and the stratum water pot is connected with the second indifferent gas
Body tank.
Preferably, the inert gas in the first inert gas tank and the second inert gas tank is nitrogen.
Preferably, the first valve and/or described true is provided on the connecting line of the vacuum pump and the first chamber
Sky pump on the connecting line of the second chamber with being provided with the second valve.
Preferably, the first pressure detection device and the second pressure detection device are pressure sensor.
Preferably, for the core holding unit in being horizontally disposed with, the first chamber and the second chamber are located at mud respectively
The left and right sides of rock rock core.
Preferably, the mud stone core barrel is made of polytetrafluoroethylene (PTFE).
Preferably, the outer surface of the core holding unit is provided with insulating layer.
The present invention also provides a kind of test method applied to above-mentioned drilling fluid chemosmosis compression testing device, for pair
The permeable pressure head of drilling fluid and mud stone rock core is measured, and is comprised the following steps：
Mud stone rock core is positioned over mud stone core barrel, and mud stone core barrel fixing seal is in core holding unit；
Water flooding injects first chamber and second chamber by stratum water pot；
Vacuum pump vacuumizes first chamber and/or second chamber, and vacuum pump is closed after making mud stone rock core saturation；
Discharge the water flooding in first chamber；
Drilling fluid injects first chamber by drilling fluid tank, and makes first chamber and second chamber pressure equivalent；
First pressure detection device and the pressure change of second pressure detection arrangement monitors first chamber and second chamber.
Beneficial effects of the present invention are：
Drilling fluid chemosmosis pressure difference test device and test method provided by the invention, make mud stone by using vacuumizing
Rock core fills water flooding, simulated formation interstitial fluid；By being injected separately into drilling fluid into the closed cavity of mud stone rock core both sides
And water flooding, the fluid distrbution of simulation mud shale borehole wall both sides, so as to effectively measure the chemistry of drilling fluid and stratum interstitial fluid
Permeable pressure head provides reliable data and supports, is that the selection of science is favourable to provide drilling fluid inhibition and wellbore stability ability
In wellbore stability, prevent the drilling fluid system to cave in and inorganic agent from providing effective detection and evaluation method；The test device
Manipulation and dismounting are easy, and test method principle is simple and practicable, is conducive to promote and apply.
Description of the drawings
Fig. 1 is the structure diagram of drilling fluid chemosmosis pressure difference test device provided in an embodiment of the present invention；
Fig. 2 is the flow chart of drilling fluid chemosmosis pressure difference test method provided in an embodiment of the present invention；
It is marked in figure as follows：
1- core holding units；101- first chambers；102- second chambers；2- mud stone core barrels；3- drilling fluid tanks；4- stratum
Water pot；5- vacuum pumps；6- the first inert gas tanks；7- the second inert gas tanks；The first valves of 8-；The second valves of 9-；10- the 3rd
Valve；The 4th valves of 11-；The 5th valves of 12-；The first liquid valves of 13-；The second liquid valves of 14-；15- first pressure detection devices；
16- second pressure detection devices.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrated only in description, attached drawing.
Fig. 1 is the structure diagram of drilling fluid chemosmosis pressure difference test device provided in an embodiment of the present invention, is used for
After simulation test drilling fluid is contacted with mud shale or other permeable formations, due to permeable pressure head caused by difference in chemical potential, mould
Intend the Medium Diffusion between drilling fluid and formation fluid and migration.As shown in Figure 1, test device provided in this embodiment is mainly wrapped
Include the core holding unit 1 for clamping mud stone rock core, the drilling fluid tank for providing drilling fluid to 1 one end cavity of core holding unit
3rd, for 1 other end of core holding unit provide water flooding stratum water pot 4, for the vacuum to mud stone rock core vacuumizing saturation
Pump 5 and for detecting drilling fluid and the pressure-detecting device of stratum water pressure in core holding unit 1.By to mud stone rock core both ends
Drilling fluid and water flooding are injected separately into, and makes to fill water flooding in mud stone rock core using vacuumizing, can be filled by pressure detecting
The pressure change put measures the permeable pressure head between drilling fluid and mud stone rock core.If replace the mud stone rock core in core holding unit 1
For other osmoticums and/or replace the fluid media (medium) injected in core holding unit 1, test device provided in an embodiment of the present invention
It can be also used for testing the permeable pressure head under other osmoticums or fluid media (medium).
Specifically, as shown in Figure 1, drilling fluid chemosmosis pressure difference test device provided in this embodiment includes being horizontally disposed with
Core holding unit 1, core holding unit 1 generally has the cylindrical structural of cavity, is provided with to hold in the middle part of cavity
The mud stone core barrel 2 of mud stone rock core.The outer wall of mud stone core barrel 2 is bonded with the inner wall sealing of core holding unit 1, to prevent mud stone
The liquid at rock core both ends influences osmotic pressure by the interstitial flow and diffusion of 2 outer wall of mud stone core barrel and 1 inner wall of core holding unit
The test result of difference.2 both ends open of mud stone core barrel for the filling placement mud stone rock core into mud stone core barrel 2, and allows mud
The liquid at rock rock core both ends carries out flowing exchange by mud stone rock core.
Due to including various chemical constituent in drilling fluid and water flooding, mud stone core barrel 2 and core holding unit 1 should
It is made of resistant material, to prevent the chemical constituent in drilling fluid or water flooding from generating corrosion to mud stone core barrel 2, causes to survey
Measure result inaccuracy or device damage.Simultaneously as it needs to inject drilling fluid or water flooding, therefore, rock into core holding unit 1
Heart clamp holder 1 is because having certain intensity, rigidity and voltage endurance capability.In the present embodiment, the material of core holding unit 1 is stainless
Steel, the material of mud stone core barrel 2 is polytetrafluoroethylplastic plastic, and core holding unit 1 and mud stone core barrel 2 can also select other materials
Matter is made.
When mud stone rock core is placed in core holding unit 1, the cavity of core holding unit 1 is divided into the first chamber by mud stone rock core
Room 101 and second chamber 102, first chamber 101 are connected with drilling fluid tank 3 by the first pipeline, for 101 note of first chamber
Enter drilling fluid；Second chamber 102 is connected with stratum water pot 4 by the second pipeline, for injecting stratum into second chamber 102
Water.By being injected separately into drilling fluid and water flooding to mud stone rock core both sides, can simulate in oil drilling or recovery process, mud page
The fluid environment of rock pit shaft both sides.
For the water flooding in simulation test drilling fluid and mud stone rock core osmotic pressure, it is necessary to make to fill stratum in mud stone rock core
Therefore water, it is necessary to inject water flooding into second chamber 102 before drilling fluid is injected to the inside of first chamber 101, makes stratum
In water penetration mud stone rock core；To accelerate the stratum water saturation of mud stone rock core, stratum water pot 4 is connected to the first chamber by the 3rd pipeline
Room 101 allows water flooding to inject first chamber 101 and second chamber 102 simultaneously, and mud stone rock core both sides is allowed to have water flooding,
So as to accelerate the saturated velocity of mud stone rock core.Since the gap in mud stone rock core is smaller, water flooding is infiltrated through by gap
The time that mud stone rock core reaches needed for the state of nature saturation is longer, it is therefore possible to use vacuum pump 5 takes out very mud stone rock core
Sky accelerates saturation.
Vacuum pump 5 is connected to first chamber 101 and second chamber 102 by the 4th pipeline and the 5th pipeline respectively, is used for
To being in the mud stone rock core vacuumizing of core clamping device, make in mud stone rock core full of water flooding.In order to control vacuum pump 5 to
One chamber 101 and/or second chamber 102 vacuumize and evacuation rate, be provided with the first valve 8 on the first pipeline, second
The second valve 9 is provided on pipeline.In practice, it can only open the first valve 8 and be vacuumized by first chamber 101,
Or the first valve 8 and the second valve 9 are opened simultaneously while first chamber 101 and second chamber 102 are vacuumized.
The mud flow rate and pressure that drilling fluid tank 3 injects first chamber 101 in order to control are provided on the first pipeline
Three valves 10；Stratum water pot 4 injects first chamber 101 and/or second chamber 102 flow and pressure of water flooding in order to control,
The 4th valve 11 is provided on second pipeline, the 5th valve 12 is provided on the 3rd pipeline.It, can be with by opening the 3rd valve 10
The drilling fluid in drilling fluid tank 3 is made to inject in first chamber 101；By opening the 4th valve 11, can make in water flooding tank 4
In water flooding injection second chamber 102；Or the 4th valve 11 and the 5th valve 12 are opened simultaneously, make water flooding injection while first
In chamber 101 and second chamber 102.
Drilling fluid injects drilling fluid and water flooding to 102 note of first chamber 101 and/or second chamber to first chamber 101
Entering the mode of water flooding can have various, pump such as may be employed, drilling fluid or water flooding are pumped into 101 or second chamber of first chamber
Other modes can also be used in room 102.In the embodiment of the present application, since the water flooding of injection and the flow of drilling fluid are smaller,
It may be employed and be passed through inert gas into drilling fluid tank 3 or stratum water pot 4, increase pressure in drilling flow container or stratum water pot 4,
So as to will drilling fluid or water flooding press-in first chamber 101 and/or second chamber 102 in.Therefore, drilling fluid tank 3 is connected with
One inert gas tank 6, stratum water pot 4 are connected with the second inert gas tank 7, and the first inert gas and/or the second inert gas can
Think the gas that nitrogen, rare gas etc. do not react with drilling fluid and water flooding, the present embodiment is from through financial cost and gas
Ready availability consideration, the equal selected as nitrogen of gas in first gas tank 6 and second gas tank 7.
To make the water flooding of injection first chamber 101 or drilling fluid and injecting the water flooding discharge of second chamber 102, rock core
Clamper 1 is equipped with the first liquid valve 13 at first chamber 101, and the second liquid valve 14 is provided at second chamber 102.To be right
First chamber 101 and drilling fluid in second chamber 102 or the Fluid pressure of water flooding measure, so as to calculate drilling fluid with
The permeable pressure head of water flooding in mud stone rock core is arranged at first pressure detection device 15, second chamber 102 at first chamber 101
Place is provided with second pressure detection device 16, in the present embodiment, first pressure detection device 15 and second pressure detection device
16 be pressure sensor.
For simulation drilling fluid and the temperature environment of stratum water penetration, 1 outer surface of core holding unit is arranged with insulating layer.It or can
With the drilling fluid or water flooding by injecting certain temperature into first chamber 101 or second chamber 102, so as to simulate not equality of temperature
The lower permeable pressure head between drilling fluid and water flooding of degree, at this point it is possible to by being set at drilling fluid tank 3 and/or at stratum water pot 4
Heating unit is put to heat the drilling fluid and/or water flooding that flow into core holding unit 1.
As shown in Fig. 2, the embodiment of the present invention, which additionally provides one kind, is applied to above-mentioned drilling fluid chemosmosis compression testing device
Drilling fluid chemosmosis pressure test method, include the following steps:
Step 1:Mud stone rock core is packed into mud stone core barrel 2, mud stone core barrel 2 is put into core holding unit 1 fix it is close
Envelope, and close all valves；
Step 2：The 4th valve 11 and the 5th valve 12 are opened, injects stratum to first chamber 101 and second chamber 102
Water；
By being passed through nitrogen to stratum water pot 4, the water flooding in stratum water pot 4 is made to be pressed into 101 and second chamber of first chamber
Room 102.Other modes can also be used, the water flooding in stratum water pot 4 is injected into first chamber 101 and second chamber 102, such as adopt
With pump etc..
Step 3：It closes the 4th valve 11 and the 5th valve 12, opens the first valve 8 and the second valve 9, vacuum pump 5 is to the
One chamber 101 and second chamber 102 vacuumize, and the first valve 8 and the second valve 9 are closed after making mud stone rock core saturation；
Make to fill water flooding in mud stone rock core using vacuum pump 5, in the present embodiment, it is small for 24 to vacuumize saturation time
When, to ensure the saturation degree of mud stone rock core closing to reality situation as far as possible.
Step 4：The first liquid valve 13 is opened, the water flooding in first chamber 101 is discharged；
Step 5：It closes the first liquid valve 13, opens the 3rd valve 10, inject drilling fluid into first chamber 101, make the
Pressure is equivalent in one chamber 101 and second chamber 102；
By being passed through nitrogen to drilling fluid tank 3, the drilling fluid in drilling fluid tank 3 is made to be pressed into first chamber 101, and makes first
The pressure value of pressure sensor and second pressure sensor is equal.Other modes can also be used to note drilling fluid in drilling fluid tank 3
Enter first chamber 101.
Step 6：First pressure detection device 15 and second pressure detection device 16 monitor first chamber 101 and second in real time
The pressure change of chamber 102.
The dynamic pressure variation of the fluid at monitoring mud stone rock core both ends, wherein the measurement pressure in second chamber 102 in real time
The difference of value and initial pressure value is after drilling fluid is contacted with mud stone rock core, due to permeable pressure head caused by difference in chemical potential.
Drilling fluid chemosmosis pressure difference test device provided by the invention, makes mud stone rock core fill ground by using vacuumizing
Layer water, simulated formation interstitial fluid；By being injected separately into drilling fluid and water flooding, mould into the closed cavity of mud stone rock core both sides
Intend the fluid distrbution of mud shale borehole wall both sides, so as to effectively measure the chemosmosis pressure difference of drilling fluid and stratum interstitial fluid, be
Drilling fluid inhibition is provided and wellbore stability ability provides reliable data and supports, wellbore stability is advantageously selected for for science
, prevent the drilling fluid system to cave in and inorganic agent from providing effective detection and evaluation method；The test device manipulates and dismounting
Simplicity, test method principle is simple and practicable, is conducive to promote and apply.
Note that it above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various apparent variations,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
It can include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a kind of drilling fluid chemosmosis pressure difference test device including core holding unit (1) and is placed in the core holding unit (1)
In mud stone core barrel (2), is placed with mud stone rock core in the mud stone core barrel (2), which is characterized in that the mud stone rock core will
The cavity of the core holding unit (1) is divided into first chamber (101) and second chamber (102)；
The first chamber (101) is connected with drilling fluid tank (3) and vacuum pump (5), and the second chamber (102) is connected with described
Vacuum pump (5) and stratum water pot (4)；
The first chamber (101) is provided with first pressure detection device (15), and the second chamber (102) is provided with the second pressure
Force checking device (16).
2. drilling fluid chemosmosis pressure difference test device according to claim 1, which is characterized in that the first chamber
(101) the stratum water pot (4) is connected.
3. drilling fluid chemosmosis pressure difference test device according to claim 1, which is characterized in that the drilling fluid tank
(3) the first inert gas tank (6) is connected with, the stratum water pot (4) is connected with the second inert gas tank (7).
4. drilling fluid chemosmosis pressure difference test device according to claim 3, which is characterized in that first indifferent gas
Inert gas in body tank (6) and the second inert gas tank (7) is nitrogen.
5. drilling fluid chemosmosis pressure difference test device according to claim 1, which is characterized in that the vacuum pump (5)
With being provided with the first valve (8) and/or the vacuum pump (5) and described second on the connecting line of the first chamber (101)
The second valve (9) is provided on the connecting line of chamber (102).
6. drilling fluid chemosmosis pressure difference test device according to claim 1, which is characterized in that the first pressure inspection
It is pressure sensor to survey device (15) and the second pressure detection device (16).
7. drilling fluid chemosmosis pressure difference test device according to claim 1, which is characterized in that the core holding unit
(1) in being horizontally disposed with, the first chamber (101) and the second chamber (102) are respectively positioned at the left and right of the mud stone rock core
Both sides.
8. drilling fluid chemosmosis pressure difference test device according to claim 1, which is characterized in that the mud stone core barrel
(2) it is made of polytetrafluoroethylene (PTFE).
9. drilling fluid chemosmosis pressure difference test device according to claim 1, which is characterized in that the core holding unit
(1) outer surface is provided with insulating layer.
10. a kind of drilling fluid chemosmosis pressure difference test method, which is characterized in that for as described in claim any one of 2-9
Drilling fluid chemosmosis pressure difference test device, and comprise the following steps：
Mud stone rock core is positioned over mud stone core barrel (2), and mud stone core barrel (2) fixing seal is in core holding unit (1)；
Water flooding is by stratum water pot (4) injection first chamber (101) and second chamber (102)；
Vacuum pump (5) vacuumizes first chamber (101) and/or second chamber (102), and vacuum is closed after making mud stone rock core saturation
It pumps (5)；
Discharge the water flooding in first chamber (101)；
Drilling fluid makes first chamber (101) and second chamber (102) pressure by drilling fluid tank (3) injection first chamber (101)
It is equivalent；
First pressure detection device (15) and second pressure detection device (16) monitoring first chamber (101) and second chamber
(102) pressure change.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810027328.0A CN108049863A (en) | 2018-01-11 | 2018-01-11 | A kind of drilling fluid chemosmosis pressure difference test device and test method |
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| CN201810027328.0A CN108049863A (en) | 2018-01-11 | 2018-01-11 | A kind of drilling fluid chemosmosis pressure difference test device and test method |
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| CN108661626A (en) * | 2018-08-02 | 2018-10-16 | 西南石油大学 | Borehole wall water enchroachment (invasion) analogue experiment installation under a kind of high temperature and pressure |
| CN109403963A (en) * | 2018-12-05 | 2019-03-01 | 西南石油大学 | A kind of cave-in device for pressure measurement after simulating the water enchroachment (invasion) that seepage field changes |
| CN111141889A (en) * | 2018-11-05 | 2020-05-12 | 安徽恩蔓智能科技有限公司 | Intelligent water injection instrument |
| CN113218832A (en) * | 2020-02-04 | 2021-08-06 | 中国石油天然气股份有限公司 | Shale osmotic pressure simulation generation device, measurement experiment system and method |
| CN117108272A (en) * | 2023-10-23 | 2023-11-24 | 东北石油大学 | Device and method for testing three characteristic capillary pressure integration in oil gas reservoir layer |
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| CN108661626B (en) * | 2018-08-02 | 2023-11-21 | 西南石油大学 | High-temperature high-pressure well wall water invasion simulation experiment device |
| CN111141889A (en) * | 2018-11-05 | 2020-05-12 | 安徽恩蔓智能科技有限公司 | Intelligent water injection instrument |
| CN109403963A (en) * | 2018-12-05 | 2019-03-01 | 西南石油大学 | A kind of cave-in device for pressure measurement after simulating the water enchroachment (invasion) that seepage field changes |
| CN109403963B (en) * | 2018-12-05 | 2024-02-06 | 西南石油大学 | Device for measuring collapse pressure of well wall after water invasion by simulating seepage field change |
| CN113218832A (en) * | 2020-02-04 | 2021-08-06 | 中国石油天然气股份有限公司 | Shale osmotic pressure simulation generation device, measurement experiment system and method |
| CN117108272A (en) * | 2023-10-23 | 2023-11-24 | 东北石油大学 | Device and method for testing three characteristic capillary pressure integration in oil gas reservoir layer |
| CN117108272B (en) * | 2023-10-23 | 2024-02-06 | 东北石油大学 | Device and method for testing three characteristic capillary pressure integration in oil gas reservoir layer |
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