CN111879681A - Radial permeability testing device and method for uniaxial compression creep process of low-permeability rock - Google Patents
Radial permeability testing device and method for uniaxial compression creep process of low-permeability rock Download PDFInfo
- Publication number
- CN111879681A CN111879681A CN202010879418.XA CN202010879418A CN111879681A CN 111879681 A CN111879681 A CN 111879681A CN 202010879418 A CN202010879418 A CN 202010879418A CN 111879681 A CN111879681 A CN 111879681A
- Authority
- CN
- China
- Prior art keywords
- test piece
- rock
- rock test
- permeability
- collecting
- 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
Images
Classifications
-
- 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
- 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
Abstract
The invention discloses a radial permeability testing device and method for a uniaxial compression creep process of low-permeability rock. The apparatus of the present invention comprises a uniaxial testing machine, a pressure supply device by which osmotic pressure can be applied downward from the top of the rock specimen, and a waste liquid collecting device. The device for measuring the radial permeability of the rock is innovative, simple in structure and easy to implement, and provides a new idea and method for permeability research in the uniaxial creep process of the underground engineering surrounding rock.
Description
Technical Field
The invention belongs to the field of geotechnical engineering, and particularly relates to a radial permeability testing device and method for a uniaxial compression creep process of low-permeability rock.
Background
For deep energy underground storage engineering, the creep and permeability of the surrounding rock are two important factors to consider. On one hand, due to the fact that the buried depth is large, the pressure of the stratum around the reservoir is large, and the creep deformation amount of surrounding rocks is large in the operation process; on the other hand, although the permeability of undisturbed surrounding rock is low, in the long-term operation process, along with the deformation increase of the surrounding rock, the internal cracks of the surrounding rock are continuously expanded and communicated, and the damage is gradually evolved and accumulated, so that the permeability of the surrounding rock is continuously increased. Therefore, the method for accurately measuring the permeability change of the low-permeability surrounding rock in the long-term creep process has important significance for ensuring the long-term operation safety of the deep energy storage warehouse.
At present, the method for measuring permeability in the rock creep process is mainly a triaxial creep test method, namely, confining pressure and axial load are applied to a cylindrical rock test piece, and osmotic pressure smaller than the confining pressure is applied along the axial direction of the test piece. For deep underground energy reservoirs, the seepage behavior of high-pressure fluid flows from the chamber to the surrounding rock, and is radial seepage, which is different from the axial seepage condition of the indoor triaxial creep test.
Disclosure of Invention
The invention aims to overcome the defects and provide a radial permeability testing device and a method for a uniaxial compression creep process of low-permeability rocks, which accord with the actual seepage condition of deep energy underground storage engineering and have higher precision.
In order to achieve the aim, the radial permeability testing device for the uniaxial compression creep process of the low-permeability rock comprises a uniaxial testing machine, a pressure supply device and a waste liquid collecting device;
the rock test piece is placed below a compressor head of the single-shaft testing machine, a connecting member is arranged between the rock test piece and the compressor head, the connecting member is connected with a pressure supply device, liquid of the pressure supply device is sent into the rock test piece from top to bottom, a waste liquid collecting device is arranged below the rock test piece, the single-shaft testing machine controls pressure through a hydraulic pump, and the hydraulic pump is connected with a computer;
the pressure supply device is used for supplying pressure liquid to the rock test piece, and a flowmeter is arranged on the pressure supply device.
The pressure supply device comprises a medium pressure output device, high-pressure fluid is sent into the connecting component through a water inlet pipeline by the medium pressure output device, and the water inlet pipeline is provided with a pressure regulating valve and a switch valve;
the lower end surface of the connecting member is provided with a groove sealing ring along the outer diameter of the rock test piece, and the lower end surface of the connecting member is fixedly bonded with the upper end surface of the rock test piece through a connecting layer;
the side wall of the connecting component is sunken in and integrally formed with a first groove, a water inlet pipeline of the pressure supply device is connected with the connecting component in the first groove through threads, and a sealing layer is embedded at the contact position of the water inlet pipeline and the first groove.
The waste liquid collecting device comprises a collecting component arranged at the bottom of the rock test piece, the collecting component is connected with a collecting pipeline, and the collecting pipeline is connected with a liquid collecting device.
The upper end face of the collecting component is provided with a liquid drainage groove for collecting seepage on the side face of the rock test piece, and the liquid drainage groove is connected with a waste liquid collecting device through a drainage pipe opening.
The upper end face of the collecting component is provided with a groove sealing ring along the outer diameter of the rock test piece.
The upper end face of the collecting member is fixedly bonded with the lower end face of the rock test piece through the connecting layer;
a second groove is formed in the side wall of the collecting component in an invagination and integrated mode, a collecting pipeline of the waste liquid collecting device is connected with the collecting component in the second groove through threads, and a sealing layer is embedded in the contact position of the collecting pipeline and the second groove;
the lower end face of the collecting component and the upper end face of the connecting component are horizontal planes, so that the collecting component and the connecting component can be smoothly attached to a compressor head of a single-axis testing machine, and the application of osmotic pressure and single-axis load can be realized simultaneously.
The testing method of the radial permeability testing device in the uniaxial compression creep process of the low-permeability rock comprises the following steps:
firstly, processing a rock test piece to enable the appearance of the rock test piece to meet a test standard, and preprocessing the rock test piece;
secondly, fixing the rock test piece below a compressor head of the single-shaft testing machine, connecting a pressure supply device between the rock test piece and the compressor head of the shaft testing machine, and connecting a waste liquid collecting device at the bottom of the rock test piece;
thirdly, the pressure supply device supplies the osmotic pressure required by the test to the rock test piece;
fourthly, the uniaxial testing machine controls to apply constant uniaxial creep load required by the test to the rock test piece through a computer;
fifthly, respectively reading t when the reading of the flowmeter changes stably in the creep process of the rock test piece1And t2Two time flow meter reading Q1And Q2；Q2And Q1The difference of (a) is t1To t2And calculating the radial permeability of the rock test piece by adopting the Darcy law based on the seepage flow of the seepage flow flowing through the rock test piece in the time period.
In the first step, the pretreatment is to prepare a water-saturated test piece by adopting a vacuum pumping method to force water saturation for 10 hours according to the characteristic of low porosity of the rock test piece.
In the fifth step, the radial permeability calculation formula of the rock test piece is as follows:
in the formula:
Q1is a time t1Reading of a time-high-precision flow meter;
Q2is a time t2Reading of a time-high-precision flow meter;
mu is the viscosity coefficient of the seepage medium;
Reis the radius of the rock specimen;
Rwthe radius of the axial through hole of the rock test piece;
Pwinthe pressure in the axial through hole of the rock test piece is measured;
Pethe surface pressure of the rock test piece is measured;
h is the height of the rock test piece;
and K is the radial permeability of the rock test piece.
Compared with the prior art, the device comprises the uniaxial testing machine, the pressure supply device and the waste liquid collecting device, and radial osmotic pressure can be applied from the axial through hole of the rock test piece through the pressure supply device.
The testing method comprises the steps of firstly processing the rock test piece, then fixing the preprocessed rock test piece on a uniaxial testing machine, applying osmotic pressure, applying uniaxial creep load on the rock test piece, and finally calculating the permeability according to the flow change of a pressure supply device.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the interface member, rock specimen and collection member of FIG. 1;
FIG. 3 is a schematic view of the connecting member of FIG. 2;
FIG. 4 is a partial schematic view of the collection member of FIG. 2;
FIG. 5 is a schematic view of the lower end surface of the connecting member of the present invention;
FIG. 6 is a schematic upper end view of a collection member according to the present invention;
in the figure: 1-medium pressure output device; 2-pressure regulating valve; 3-a flow meter; 4-switching the valve; 5-a water inlet pipeline; 6-a connecting member; 7-a rock test piece; 8-a collecting member; 9-a collection pipe; 10-a liquid collection device; 11-uniaxial testing machine; 12-a hydraulic pump; 13-a computer; 14-a tie layer; 15-a sealing layer; 16-a first groove; 17-a second groove; 18-groove seal ring; 19-drainage grooves; 20-drainage pipe orifice; 21-inlet pipe orifice; 22-groove seal ring.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a radial permeability testing device for low permeability rocks comprises a single-axis testing machine 11, a pressure supply device and a waste liquid collecting device;
the rock test piece 7 is placed below a compressor head of the single-shaft testing machine 11, the connecting member 6 is arranged between the rock test piece 7 and the compressor head, the connecting member 6 is connected with the pressure supply device and sends liquid of the pressure supply device into the rock test piece 7 from top to bottom, the waste liquid collecting device is arranged below the rock test piece 7, the single-shaft testing machine 11 controls the pressure through the hydraulic pump 12, and the hydraulic pump 12 is connected with the computer 13;
the pressure supply device is used for supplying pressure liquid to the rock test piece 7, and the pressure supply device is provided with a flowmeter 3.
The pressure supply device comprises a medium pressure output device 1, high-pressure fluid is sent into a connecting component 6 through a water inlet pipeline 5 through the medium pressure output device 1, and a pressure regulating valve 2 and a switch valve 4 are arranged on the water inlet pipeline 5;
referring to fig. 5 and 6, a groove sealing ring 22 with an outer diameter is arranged on the lower end surface of the connecting member 6 along the rock test piece 7, and the lower end surface of the connecting member 6 is fixedly bonded with the upper end surface of the rock test piece 7 through the connecting layer 14;
referring to fig. 2 and 3, a first groove 16 is formed in the side wall of the connecting member 6 in an invaginated and integrated manner, the water inlet pipe 5 of the pressure supply device is connected with the connecting member 6 in the first groove 16 through threads, and a sealing layer is embedded at the contact position of the water inlet pipe 5 and the first groove 16.
The waste liquid collecting device comprises a collecting member 8 arranged at the bottom of the rock test piece 7, the collecting member 8 is connected with a collecting pipeline 9, and the collecting pipeline 9 is connected with a liquid collecting device 10.
The upper end face of the collecting member 8 is provided with a liquid drainage groove 19 for collecting the seepage on the side face of the rock test piece 7, and the liquid drainage groove 19 is connected with a waste liquid collecting device through a drainage pipe opening 20.
The upper end face of the collecting member 8 is provided with a groove seal 18 along the outer diameter of the rock specimen 7.
The upper end face of the collecting member 8 is fixedly bonded with the lower end face of the rock test piece 7 through a connecting layer 14;
referring to fig. 2 and 4, the side wall of the collecting member 8 is recessed into a second groove 17, the collecting pipe 9 and the collecting member 8 of the waste liquid collecting device are connected in the second groove 17 through threads, and a sealing layer is embedded at the contact position of the collecting pipe 9 and the second groove 17.
The testing method of the radial permeability testing device in the uniaxial compression creep process of the low-permeability rock comprises the following steps:
firstly, processing a rock test piece 7 to enable the appearance of the rock test piece 7 to meet a test standard, preprocessing the rock test piece 7, and forcibly saturating water for 10 hours by adopting a vacuum pumping method to prepare a water-saturated test piece according to the characteristic of low porosity of the rock test piece 7;
secondly, fixing the rock test piece 7 below a compressor head of the single-shaft testing machine 11, connecting a pressure supply device between the rock test piece 7 and the compressor head of the single-shaft testing machine 11, and connecting a waste liquid collecting device at the bottom of the rock test piece 7;
thirdly, the pressure supply device supplies the rock test piece 7 with the osmotic pressure required by the test;
fourthly, the uniaxial testing machine 11 controls a constant uniaxial creep load required by the test to be applied to the rock test piece 7 through the computer 13;
fifthly, in the creep process of the rock test piece 7, when the reading change of the flowmeter 3 is stable, respectively reading t1And t2Two time flow meter reading Q1And Q2；Q2And Q1The difference of (a) is t1To t2And (3) calculating the radial permeability of the rock test piece 7 by adopting the Darcy law on the basis of the seepage flow flowing through the rock test piece 7 in the time period. The radial permeability calculation formula of the rock test piece 7 is as follows:
in the formula:
Q1is a time t1Reading of a time-high-precision flow meter;
Q2is a time t2Reading of a time-high-precision flow meter;
mu is the viscosity coefficient of the seepage medium;
Reis the radius of the rock specimen;
Rwthe radius of the axial through hole of the rock test piece;
Pwinthe pressure in the axial through hole of the rock test piece is measured;
Pefor outside of rock test piecesSurface pressure;
h is the height of the rock test piece;
and K is the radial permeability of the rock test piece.
Example (b):
as shown in FIG. 1, the radial permeability testing device for the uniaxial compression creep process of the hypotonic rock comprises: a single-shaft electro-hydraulic servo pressure system and a permeability testing system;
the single-shaft electro-hydraulic servo pressure system comprises a single-shaft testing machine 11, a hydraulic pump 12 and a computer 13;
the permeability testing system comprises a liquid collecting device 10, a collecting pipeline 9, a collecting member 8, a rock test piece 7 (phi x h is 50mm x 100mm) which is drilled along the central axis to form a circular through hole with the diameter of 3mm, a connecting member 6, a water inlet pipeline 5, a switch valve 4, a high-precision flowmeter 3, a pressure regulating valve 2 and a medium pressure output device 1.
The method for testing the radial permeability of the low-permeability rock in the uniaxial creep state by adopting the device comprises the following steps:
(1) and (3) processing a test piece: processing a rock sample into a cylindrical test piece with the height of 100mm and the diameter of 50mm, and drilling a hole along the axial center of the test piece to form a circular through hole with the diameter of 3 mm;
(2) saturation of the test piece: according to the characteristic of low porosity of the rock test piece, forcibly saturating water for 10 hours by adopting a vacuum pumping method to prepare a water-saturated test piece;
(3) and (3) mounting a test piece: respectively bonding and fixing the connecting member and the collecting member with the upper end surface and the lower end surface of the rock test piece through the connecting layer, and integrally mounting the connecting member and the collecting member on a single-shaft testing machine;
(4) osmotic pressure application: the high-pressure fluid output by the medium pressure output device flows into and fills the axial through hole of the rock test piece through the pressure regulating valve, the high-precision flowmeter, the switch valve and the connecting member in sequence, and the fluid pressure in the axial through hole of the rock test piece is constant to be the osmotic pressure required by the test through the pressure regulating valve;
(5) uniaxial creep load application: applying a constant uniaxial creep load required by the test to the rock test piece through a uniaxial testing machine;
(6) and (3) calculating the permeability: during rock creepWhen the reading of the flowmeter is stable, t is read respectively1、t2Two time flow meter reading Q1And Q2；Q2And Q1The difference of (a) is t1～t2The seepage flow passing through the rock test piece in the time period; and calculating the radial permeability of the rock test piece by adopting Darcy's law based on the seepage flow.
The radial permeability of the rock test piece is calculated according to the following formula:
in the formula:
Q1is a time t1Reading of a time-high-precision flow meter;
Q2is a time t2Reading of a time-high-precision flow meter;
mu is the viscosity coefficient of the seepage medium;
Reis the radius of the rock specimen;
Rwthe radius of the axial through hole of the rock test piece;
Pwinthe pressure in the axial through hole of the rock test piece is measured;
Pethe surface pressure of the rock test piece is measured;
h is the height of the rock test piece;
and K is the radial permeability of the rock test piece.
Claims (10)
1. The radial permeability testing device for the uniaxial compression creep process of the low-permeability rock is characterized by comprising a uniaxial testing machine (11), a pressure supply device and a waste liquid collecting device;
the rock test piece (7) is placed below a compressor head of the single-shaft testing machine (11), a connecting member (6) is arranged between the rock test piece (7) and the compressor head, the connecting member (6) is connected with a pressure supply device and sends liquid of the pressure supply device into the rock test piece (7) from top to bottom, a waste liquid collecting device is arranged below the rock test piece (7), the single-shaft testing machine (11) controls the pressure through a hydraulic pump (12), and the hydraulic pump (12) is connected with a computer (13);
the pressure supply device is used for supplying pressure liquid to the rock test piece (7), and a flowmeter (3) is arranged on the pressure supply device.
2. The apparatus for testing the radial permeability during uniaxial compressive creep of hypotonic rock according to claim 1, characterized in that the pressure supply device comprises a medium pressure output device (1), high pressure fluid is fed into the connecting member (6) through a water inlet pipe (5) via the medium pressure output device (1), and the water inlet pipe (5) is provided with a pressure regulating valve (2) and a switch valve (4).
3. The device for testing the radial permeability of the hypotonic rock in the uniaxial compression creep process according to claim 2, wherein the lower end surface of the connecting member (6) is provided with a groove sealing ring (22) along the outer diameter of the rock test piece (7), and the lower end surface of the connecting member (6) is fixedly bonded with the upper end surface of the rock test piece (7) through the connecting layer (14);
the side wall of the connecting component (6) is sunken in and integrally formed with a first groove (16), a water inlet pipeline (5) of the pressure supply device is connected with the connecting component (6) in the first groove (16) through threads, and a sealing layer is embedded at the contact position of the water inlet pipeline (5) and the first groove (16).
4. The device for testing the radial permeability during uniaxial compressive creep of hypotonic rock according to claim 1, characterized in that the waste liquid collecting device comprises a collecting member (8) arranged at the bottom of the rock test piece (7), the collecting member (8) is connected with a collecting pipeline (9), and the collecting pipeline (9) is connected with a liquid collecting device (10).
5. The device for testing the radial permeability during the uniaxial compressive creep of the low-permeability rock according to claim 4, characterized in that the upper end surface of the collecting member (8) is provided with a liquid drainage groove (19) for collecting the seepage from the side surface of the rock test piece (7), and the liquid drainage groove (19) is connected with a waste liquid collecting device through a drainage pipeline port (20).
6. The device and the method for testing the radial permeability of the hypotonic rock uniaxial compression creep process according to claim 4, wherein the upper end surface of the collecting member (8) is provided with a groove sealing ring (18) along the outer diameter of the rock test piece (7).
7. The device for testing the radial permeability during uniaxial compressive creep of low-permeability rock according to claim 4, wherein the upper end surface of the collecting member (8) is fixedly bonded to the lower end surface of the rock specimen (7) through the connecting layer (14);
the lateral wall of collecting component (8) is caved in integrated into one piece and is had second recess (17), and through threaded connection in second recess (17) collecting pipeline (9) and collecting component (8) of waste liquid collection device, the contact department of collecting pipeline (9) and second recess (17) inlays and is equipped with the sealing layer.
8. The method for testing the radial permeability test device of the hypotonic rock uniaxial compression creep process of claim 1, comprising the steps of:
firstly, processing a rock test piece (7), enabling the appearance of the rock test piece (7) to meet a test standard, and preprocessing the rock test piece (7);
secondly, fixing the rock test piece (7) below a compressor head of the single-shaft testing machine (11), connecting a pressure supply device between the rock test piece (7) and the compressor head of the single-shaft testing machine (11), and connecting a waste liquid collecting device at the bottom of the rock test piece (7);
thirdly, the pressure supply device supplies the rock test piece (7) with the osmotic pressure required by the test;
fourthly, the uniaxial testing machine (11) controls to apply constant uniaxial creep load required by the test to the rock test piece (7) through the computer (13);
fifthly, in the creep process of the rock test piece (7), when the reading change of the flowmeter (3) is stable, respectively reading t1And t2Two time flow meter reading Q1And Q2；Q2And Q1The difference of (a) is t1To t2The seepage flow passing through the rock test piece (7) in the time period is measured by adopting Darcy's law based on the seepage flowAnd calculating the radial permeability of the rock test piece (7).
9. The testing method of the radial permeability testing device in the uniaxial compression creep process of the low-permeability rock according to claim 8, wherein in the step one, pretreatment is to prepare a water-saturated test piece by adopting a vacuum pumping method to force water saturation for 10 hours according to the characteristic of low porosity of the rock test piece (7).
10. The testing method of the radial permeability testing device of the hypotonic rock uniaxial compression creep process according to the claim 8, wherein in the fifth step, the radial permeability of the rock test piece (7) is calculated according to the following formula:
in the formula:
Q1is a time t1Reading of a time-high-precision flow meter;
Q2is a time t2Reading of a time-high-precision flow meter;
mu is the viscosity coefficient of the seepage medium;
Reis the radius of the rock specimen;
Rwthe radius of the axial through hole of the rock test piece;
Pwinthe pressure in the axial through hole of the rock test piece is measured;
Pethe surface pressure of the rock test piece is measured;
h is the height of the rock test piece;
and K is the radial permeability of the rock test piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010879418.XA CN111879681A (en) | 2020-08-27 | 2020-08-27 | Radial permeability testing device and method for uniaxial compression creep process of low-permeability rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010879418.XA CN111879681A (en) | 2020-08-27 | 2020-08-27 | Radial permeability testing device and method for uniaxial compression creep process of low-permeability rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111879681A true CN111879681A (en) | 2020-11-03 |
Family
ID=73198683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010879418.XA Pending CN111879681A (en) | 2020-08-27 | 2020-08-27 | Radial permeability testing device and method for uniaxial compression creep process of low-permeability rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111879681A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903564A (en) * | 2021-02-01 | 2021-06-04 | 贵州工程应用技术学院 | Rock permeability measuring device for geology |
| CN114739882A (en) * | 2022-03-21 | 2022-07-12 | 煤炭科学研究总院有限公司 | Experimental device for monitoring pore water pressure and transverse permeability based on single-axis testing machine |
-
2020
- 2020-08-27 CN CN202010879418.XA patent/CN111879681A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903564A (en) * | 2021-02-01 | 2021-06-04 | 贵州工程应用技术学院 | Rock permeability measuring device for geology |
| CN114739882A (en) * | 2022-03-21 | 2022-07-12 | 煤炭科学研究总院有限公司 | Experimental device for monitoring pore water pressure and transverse permeability based on single-axis testing machine |
| CN114739882B (en) * | 2022-03-21 | 2023-08-29 | 煤炭科学研究总院有限公司 | Experimental device for monitoring pore water pressure and transverse permeability based on single-axis testing machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102455277B (en) | Device and method for measuring gasometry permeability of rock under high pressure | |
| CN110501272B (en) | Method for simultaneously testing porosity and permeability of porous rock under triaxial stress and pore pressure conditions | |
| CN104747187B (en) | A kind of high temperature and pressure borehole wall strengthens drilling fluid simulated experimental provision and method | |
| CN111879681A (en) | Radial permeability testing device and method for uniaxial compression creep process of low-permeability rock | |
| CN105973786A (en) | Shale base block dynamic damage evaluation device and method based on liquid pressure pulse | |
| CN111220484A (en) | Reciprocating type rock crack friction-seepage characteristic testing device and testing method | |
| CN106204304B (en) | A kind of poly- determination method for driving permeability saturation curve of Conglomerate Reservoir | |
| CN105806712B (en) | Hole internal water pressure test device and test macro | |
| CN103969165A (en) | Device and method for simultaneously testing permeability of compact rocks under transient state and steady state | |
| CN107130960B (en) | Numerical simulation method considering nonlinear seepage characteristics of tight sandstone reservoir | |
| CN107288632B (en) | Coal-rock reservoir drainage and production water source and pressure drop path simulation device and method | |
| CN201803962U (en) | Heterogeneous model computed tomography (CT) scan simulation device | |
| CN204511430U (en) | Drilling fluid simulated experimental facilities strengthened by a kind of HTHP borehole wall | |
| CN102768174A (en) | Experimental apparatus for determining permeability of raw coal and method thereof | |
| CN103075147A (en) | Underground environment simulation device and method | |
| CN109239310A (en) | A kind of seepage force size and its measuring device and method that stratum effective stress is influenced | |
| CN104406895A (en) | Novel coal bed permeability testing device and method | |
| CN105134149B (en) | A kind of change carbon dioxide between injection-production well and drive the apparatus and method of situation | |
| CN212459330U (en) | Radial permeability testing device for uniaxial compression creep process of low-permeability rock | |
| CN201635721U (en) | Multifunctional coalbed drilling fluid dynamic pollution assessment equipment | |
| CN116046635A (en) | Large-particle-size high-porosity rock constant head permeation experiment device and method | |
| CN87215192U (en) | Device for measuring gas pressure of coal bed by drilling hole | |
| CN109696324A (en) | The confining pressure experimental provision in situ of Rock And Soil in a kind of drilling of ground | |
| CN109030319A (en) | A kind of device and method measuring rock seepage flow | |
| CN101936311A (en) | Stratum pressure tester accumulator while drilling |
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 |