CN111337411B - Method and device for testing radial permeability of full-diameter shale - Google Patents
Method and device for testing radial permeability of full-diameter shale Download PDFInfo
- Publication number
- CN111337411B CN111337411B CN202010292115.8A CN202010292115A CN111337411B CN 111337411 B CN111337411 B CN 111337411B CN 202010292115 A CN202010292115 A CN 202010292115A CN 111337411 B CN111337411 B CN 111337411B
- Authority
- CN
- China
- Prior art keywords
- plug
- fluid
- pressure
- injection
- core
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 79
- 230000035699 permeability Effects 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 173
- 238000004519 manufacturing process Methods 0.000 claims abstract description 63
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 239000011435 rock Substances 0.000 claims abstract description 25
- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 238000002347 injection Methods 0.000 claims description 123
- 239000007924 injection Substances 0.000 claims description 123
- 239000011148 porous material Substances 0.000 claims description 35
- 239000007788 liquid Substances 0.000 claims description 19
- 230000035515 penetration Effects 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000010998 test method Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000001802 infusion Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 4
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a method and a device for testing radial permeability of full-diameter shale. The testing device comprises a core holder, an axial pressure pump, a confining pressure pump and a fluid seepage monitoring system, wherein the core holder comprises a first plug assembly, a pressure-bearing cylinder, a second plug assembly, a rubber sleeve, a plug, at least one converging assembly and a production plug which are coaxially and sequentially connected, a closed space for placing a core to be tested is formed by injecting the plug, the production plug and the rubber sleeve, and the axial pressure pump can apply axial pressure to the core to be tested; the confining pressure booster pump can apply confining pressure to the rock core to be measured; the fluid permeation flow monitoring system includes an infusion pump, a fluid container tank, a plurality of flow meters, a plurality of pressure meters, and a plurality of control valves. The testing method comprises the step of testing the radial permeability of the core to be tested according to the testing device. The beneficial effects of the invention include: the device has good sealing performance and high testing efficiency, and the method can test the permeability of different radial directions.
Description
Technical Field
The invention relates to the technical field of shale reservoir yield increase transformation, in particular to a testing method and a testing device for full-diameter shale radial permeability.
Background
Shale gas reservoirs often contain a large number of nanoscale pores, secondary microscale pores and microcracks simultaneously have multi-scale seepage characteristics such as viscous flow, slip flow, knudsen diffusion flow and the like, the unique seepage characteristics of the shale gas reservoirs show strong anisotropy, and meanwhile, the conventional seepage theory cannot adapt to the yield improvement of the shale gas reservoirs due to the existence of coupling action of a ground stress field and a temperature field.
Disclosure of Invention
The present invention is directed to solving one or more of the problems of the prior art, including the shortcomings of the prior art. For example, one of the purposes of the present invention is to provide a method and a device for testing the radial permeability of full-diameter shale.
In order to achieve the above purpose, the invention provides a testing device for the radial permeability of full-diameter shale. The testing device can comprise a core holder, an axial pressurizing pump, a confining pressure pressurizing pump and a fluid seepage monitoring system, wherein the core holder can comprise a first plug assembly, a pressure-bearing cylinder and a second plug assembly which are coaxially and sequentially connected, a rubber sleeve is arranged in the pressure-bearing cylinder, an injection plug, at least one confluence assembly and a production plug are arranged in the rubber sleeve, the injection plug, the production plug and the rubber sleeve enclose a closed space for placing a core to be tested, and the pressure-bearing cylinder can comprise a first opening and a second opening at two ends; the first plug assembly is in sealing connection with the first opening and is configured to be capable of transmitting axial pressure to the injection plug, and the second plug assembly is in sealing connection with the second opening and is configured to be capable of fixing the output plug; the rubber sleeve is respectively connected with the first plug assembly and the second plug assembly in a sealing way, and forms a closed confining pressure cavity with the first plug assembly, the pressure-bearing cylinder and the second plug assembly; the injection plug is provided with an injection channel for injecting fluid into the core to be tested, and the output plug is provided with an output channel for discharging the fluid; the at least one converging component is arranged along the length direction of the outer wall of the rock core to be tested and is wrapped on the rock core to be tested so as to collect fluid to the output channel; the axial pressurizing pump is used for driving the first plug assembly to apply axial pressure to the injection plug so as to form axial pressure on the core to be tested; the confining pressure pressurizing pump is communicated with the confining pressure cavity and is configured to be capable of injecting confining pressure liquid into the confining pressure cavity so as to form confining pressure on the rock core to be tested; the fluid seepage monitoring system comprises an injection pump, a fluid container tank, an injection fluid flowmeter, an injection control valve, an injection pressure sensor, a production control valve, a production fluid flowmeter and a production pressure sensor, wherein the fluid container tank, the injection fluid flowmeter, the injection control valve and the injection channel are sequentially connected through pipelines, fluid injected into a core to be tested is stored in the fluid container tank, the injection fluid flowmeter is used for monitoring the flow of the injected fluid, and the injection control valve is used for controlling the opening and closing of the pipelines; the injection pump can pump the fluid in the fluid container tank into the core holder; an injection pressure sensor is disposed on a line connecting the injection control valve with the injection passage and configured to be capable of monitoring a pressure of the injection fluid; the output channel, the output control valve and the output fluid flowmeter are sequentially connected through pipelines, the output control valve is used for controlling the opening and closing of the pipelines, and the output fluid flowmeter is used for monitoring the flow of output fluid; a production pressure sensor is disposed on a line connecting the production control valve with the production fluid flow meter and configured to monitor the pressure of the production fluid.
In one exemplary embodiment of the full diameter shale radial penetration testing apparatus of the present invention, the first plug assembly may comprise a first closure cap, an adjustment plug, an adjustment sleeve, and a first adjustment sleeve, wherein,
One end of the adjusting plug is in sealing connection with the first opening end of the pressure-bearing cylinder, and the other end of the adjusting plug is in sealing connection with the first sealing cover;
one end of the first positioning sleeve is connected with the injection plug, and the other end of the first positioning sleeve is connected with the adjusting sleeve;
The first positioning sleeve and the adjusting sleeve are arranged in the adjusting plug and the first sealing cover and can be mutually matched to adjust and fix the axial position of the injection plug.
In an exemplary embodiment of the full-diameter shale radial permeability testing device, a first cavity and a second cavity which are distributed along the first opening to the second opening and are mutually isolated can be formed between the adjusting sleeve and the adjusting plug, a pumping channel which is used for communicating the first cavity with the outside is further arranged on the adjusting plug, the pumping channel is connected with an axial pressurizing pump through a pipeline, and after axial pressurizing liquid is injected, the adjusting sleeve and the first positioning sleeve are pushed to apply axial pressure to the injecting plug so as to form axial pressure on a rock core to be tested, wherein the first cavity is sealed under the condition that the pumping channel is blocked.
In an exemplary embodiment of the full diameter shale radial penetration testing apparatus of the present invention, the first plug assembly may include a piston disposed therein for driving the piston to apply an axial pressure to the injection plug to form an axial pressure to the core to be tested, wherein the piston has a passage for the injection line therethrough.
In one exemplary embodiment of the full diameter shale radial penetration testing apparatus of the present invention, the second plug assembly may comprise a stationary plug, a second closure cap, and a second positioning sleeve disposed inside the stationary plug, wherein,
The fixed plug is fixedly connected with the second opening;
The second sealing cover can fixedly connect the fixed plug and the second positioning sleeve with the second opening end of the pressure-bearing cylinder, wherein the fixed plug is in sealing connection with the pressure-bearing cylinder.
In an exemplary embodiment of the full diameter shale radial penetration testing apparatus of the present invention, the production channel, the production control valve, the production fluid flow meter and the production pressure sensor may comprise at least one sub-production channel, a sub-production control valve, a sub-production fluid flow meter and a sub-production pressure sensor, respectively, which are in one-to-one correspondence with the at least one converging assembly.
The invention further provides a method for testing the radial permeability of the full-diameter shale. The testing method adopts the testing device for the variability of the radial permeability of the full-diameter shale, and can comprise the following steps: drying a cylindrical rock core to be tested, drilling a coaxial pore canal on the rock core to be tested, then placing the rock core to be tested into a testing device, and leading one end with the pore canal towards an injection plug for testing fluid to flow into the pore canal; the piston is pressurized, so that axial pressurization of the core to be tested is realized; opening a confining pressure pump, injecting confining pressure liquid into the confining pressure cavity to pressurize the rubber sleeve, and realizing confining pressure pressurization of the core to be tested; starting an injection pump, pumping the fluid in the fluid container tank into the clamp holder, and monitoring the flow and pressure of the injected and produced fluid through an injection fluid flowmeter, an injection pressure sensor, a produced fluid flowmeter and a produced pressure sensor; after the flow and pressure of the injected fluid and the produced fluid are stable for 0.8-1.5 h, the permeability test is carried out, the permeability is K,
Where h is the depth of the hole, P 1 is the pressure of the injected fluid, P 2 is the pressure of the produced fluid, r 1 is the radius of the hole, r 2 is the radius of the core to be measured, Q is the flow rate of the produced fluid, and μ is the fluid viscosity.
In one exemplary embodiment of the method for testing the radial permeability of full diameter shale of the present invention, the method may further comprise the steps of:
The anisotropy of the permeability of the core to be tested in different radial directions is tested by monitoring the injection and production fluid pressure of at least one sub-output channel independently, and the anisotropy of the permeability is expressed in a matrix form of the permeability.
In one exemplary embodiment of the method for testing the radial permeability of full diameter shale of the present invention, the method may further comprise the steps of:
And (3) sequentially carrying out anisotropic measurement at different radial sections in the pore canal by using metal pipelines with different lengths, repeating the permeability test and the anisotropy test of the permeability, comparing the measurement results, and evaluating the heterogeneity of the shale core.
In one exemplary embodiment of the method for testing radial permeability of full diameter shale of the present invention, the method may further comprise the step of, prior to drilling the wellbore: scanning the volume ratio of the internal pores and the natural cracks in the radial direction;
After the permeability of the core to be tested in different radial directions is tested, the volume ratio of the pores and the natural cracks in the different radial directions is compared and corrected with the permeability, and the correlation between the pores and the natural cracks is determined.
Compared with the prior art, the invention has the beneficial effects that: the testing device realizes triaxial stress loading and unloading in the testing process, and has good sealing performance and high testing efficiency; the testing method can evaluate the sensitivity of triaxial stress to the permeability of the shale core, test the permeability of different fluids to different radial directions, represent the anisotropy of the permeability in a tensor form, and measure the radial permeability in different axial lengths.
Drawings
The foregoing and other objects and features of the invention will become more apparent from the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 illustrates a schematic structural diagram of a full diameter shale radial penetration testing apparatus in an exemplary embodiment of the present invention;
FIG. 2 illustrates a schematic diagram of a structure of an adjusting plug in an exemplary embodiment of the invention;
FIG. 3 illustrates a schematic structural view of a stationary plug in an exemplary embodiment of the present invention;
FIG. 4 illustrates a schematic diagram of an injection plug in an exemplary embodiment of the invention;
FIG. 5 illustrates a schematic diagram of a production plug in an exemplary embodiment of the invention;
FIG. 6 illustrates a schematic structural view of a manifold assembly in an exemplary embodiment of the invention;
FIG. 7 illustrates a schematic installation of a manifold assembly in an exemplary embodiment of the invention;
FIG. 8 illustrates a schematic of a fluid injection line and a location of a core under test in an exemplary embodiment of the invention;
Fig. 9 shows a test schematic in an exemplary embodiment of the invention.
The main reference numerals are as follows:
1. Injection plug, 101, first cylinder section, 102, second cylinder section, 103, third cylinder section, 2, second cover, 3, fixed plug, 301, fourth cylinder section, 302, fifth cylinder section, 303, sixth cylinder section, 4, pressure cylinder, 5, gum cover, 6, output plug, 7, fluid manifold, 8, insulation cover, 9, first positioning sleeve, 10, adjustment plug, 11, pump injection port, 12, first cover, 13, adjustment sleeve, 14, fluid injection pipe, 15, fluid output pipe, 16, second positioning sleeve, 17, injection channel, 18, output channel, 18a, output channel inlet, 18B, output channel outlet, 19, manifold, 20, core to be measured, 21, an axial pressure pump, 22, a confining pressure pump, 23, a fluid container tank, 24, a pressure reducing valve, 25, an injection fluid flowmeter, 26, a check valve, 27, an injection pressure sensor, 28, an injection pump, 29, a sub-production control valve, 31, a sub-production pressure sensor, 32, a sub-production fluid flowmeter, 33, a plug valve a,34, a plug valve B,35, a plug valve C,36, a plug valve D,37, a sub-production fluid flowmeter a,38, a sub-production fluid flowmeter B,39, a sub-production fluid flowmeter C,40, a sub-production fluid flowmeter D,41, a sub-production pressure sensor a,42, a sub-production pressure sensor B,43, a sub-production pressure sensor C,44, and a sub-production pressure sensor D.
Detailed Description
Hereinafter, a method and apparatus for testing the radial penetration capacity of full diameter shale of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.
The invention provides a testing device for radial permeability of full-diameter shale.
In a first exemplary embodiment of the present invention, as shown in fig. 1, the testing device may include a core holder, an axial pressurization pump 21, a confining pressure pressurization pump 22, and a fluid seepage monitoring system.
Specifically, the core holder may include a first plug assembly, a pressure-bearing cylinder 4, and a second plug assembly that are coaxially and sequentially connected, a rubber sleeve 5 disposed inside the pressure-bearing cylinder 4, and an injection plug 1, at least one confluence assembly, and a production plug 6 disposed inside the rubber sleeve 5, where the rubber sleeve 5, the injection plug 1, the production plug 6, the first plug assembly, the pressure-bearing cylinder 4, and the second plug assembly may all be coaxially disposed, as shown in fig. 1.
In this embodiment, as shown in fig. 1, the pressure-bearing cylinder 4 may be cylindrical, and may have a first opening at a left end and a second opening at a right end, where the first opening end of the pressure-bearing cylinder 4 is connected to the first plug assembly and the second opening end of the pressure-bearing cylinder 4 is connected to the second plug assembly. In addition, the outer wall of the cylinder body of the pressure-bearing cylinder 4 can be further wrapped with a heat preservation sleeve 8, and the temperature change of the clamp holder in the experiment can be reduced by arranging the heat preservation sleeve 8, so that the test result is more accurate.
In this embodiment, as shown in fig. 1, the rubber sleeve 5 may have a cylindrical structure with openings at both axial ends, and both ends with openings are respectively connected with the first plug assembly and the second plug assembly in a sealing contact manner, the middle part of the rubber sleeve 5 may be concave, and may also enclose a sealed confining pressure cavity with the inner wall of the pressure-bearing cylinder 4, the first plug assembly and the second plug assembly (or the rubber sleeve 5 encloses a sealed confining pressure cavity with the inner wall of the pressure-bearing cylinder 4), and meanwhile, the pressure-bearing cylinder 4 may have a hole penetrating through the side wall so that the confining pressure cavity is communicated with the outside, so as to facilitate injection of confining pressure liquid into the confining pressure cavity.
In this embodiment, as shown in fig. 1, the injection plug 1 and the output plug 6 may be both formed by two cylindrical segments connected coaxially, and the radial dimensions of the cylindrical segments are inconsistent (as shown in fig. 4 and 5), but the radial dimensions of the cylindrical segments forming the injection plug 1 and the output plug 6 are consistent, and the cylindrical segments can be attached to the inner wall of the rubber sleeve 5 to cooperate with each other, meanwhile, the two cylindrical segments with the larger radial dimensions are oppositely arranged, the core 20 to be measured may be disposed in a space surrounded by the rubber sleeve 5, the injection plug 1 and the output plug 6, the core 20 to be measured may be a cylindrical core, the core 20 to be measured may be coaxially disposed with the holder, and one axial end of the core 20 to be measured may contact the injection plug 1 (contact one end with the larger radial dimension of the injection plug 1), the other axial end may contact the output plug 6 (contact one end with the larger radial dimension of the output plug 6), and the radial dimension of the core to be measured may be 0.8 to 0.9 times the inner diameter of the rubber sleeve. As shown in fig. 4, the injection plug 1 is provided with an injection channel 17 penetrating through, and is used for introducing a test fluid into the core to be tested; as shown in fig. 5, at least one sub-output channel is formed on the output plug 6, the liquid inlet 18a of the output channel may be located on an end surface of one end of the output plug 6, which is matched with the gum cover 5, the liquid outlet 18b of the output channel may be disposed on an end surface of the output plug 6, which is away from one end of the injection plug, the sub-output channels may be L-shaped channels, the number of the sub-output channels may be 4-8 (the number of the sub-output channels may be even), for example, 4 or 6 or 8 sub-output channels may be determined according to the length and diameter of the core to be tested and the injected fluid amount, and each sub-output channel may respectively correspond to one converging component.
Specifically, the first plug assembly can extend into the pressure-bearing barrel 4 from the first opening end, can be fixedly and hermetically connected with one end of the pressure-bearing barrel 4 with the first opening, and can also apply axial thrust to the injection plug 1, and adjust the axial position of the injection plug 1 in the rubber sleeve 5, so that the device can adapt to cores to be tested with different lengths. The first plug assembly may include a first cover 12, an adjustment plug 10, an adjustment sleeve 13, and a first adjustment sleeve 9. As shown in fig. 1, the adjusting plug 10 may have a cylindrical or cylindrical-like structure, and one end of the adjusting plug 10 may be in threaded connection with the first opening end of the pressure-bearing cylinder 4, and may be sealed by a sealing element (for example, by an O-ring seal), and the other end is connected with the first sealing cover 12 in a sealing manner; the first sealing cover 12 can be disc-like, an opening is formed in the middle of the disc, the first sealing cover 12 can be fixedly connected with the adjusting plug 10 through bolts and is sealed (such as an O-shaped sealing ring) through a sealing element, and in addition, an open pore structure which is convenient for the adjusting plug to be detached from and installed with the pressure-bearing cylinder can be arranged on the adjusting plug 10; the adjusting sleeve 13 may include a cylindrical barrel and a boss-like structure located on an outer wall of the barrel, the adjusting sleeve 13 may be adjusted in cooperation with the first positioning sleeve 9 and fix an axial position of the injection plug 1 in the rubber sleeve 5, in particular, the adjusting sleeve 13, the first positioning sleeve 9 and the injection plug 1 may be sequentially disposed along a direction from the first opening to the second opening, wherein a part barrel of the adjusting sleeve 13 may be located inside the adjusting plug 10 and an end portion (i.e., a right side in fig. 1) of the part barrel may be in contact with the first positioning sleeve 9, and the rest barrels are located outside; part of the cylinder body or all the cylinder bodies of the first positioning sleeve 9 can penetrate into the rubber sleeve 5 to be in contact with the injection plug 1.
In this embodiment, as shown in fig. 1, a first cavity and a second cavity which are distributed along a first opening to a second opening and are isolated from each other can be formed between the adjusting sleeve 13 and the adjusting plug 10, and a pump injection port 11 for communicating the first cavity with the outside can be further provided on the adjusting plug 10, wherein the second cavity is sealed, and when a pump injection port channel is plugged, the first cavity is sealed. The pump injection port 11 is used for injecting fluid into the first cavity, so that the first positioning sleeve 9 can be pushed to move in the direction from the first opening to the second opening, and the axial position of the injection plug 1 in the rubber sleeve 5 can be adjusted and fixed. The adjustment sleeve 13 and the first positioning sleeve 9 may be formed as a single piece.
In this embodiment, as shown in fig. 2, the adjusting plug 10 may include a first cylinder segment 101, a second cylinder segment 102 and a third cylinder segment 103 that are axially connected in sequence, where the inner diameter of the second cylinder segment 102 is larger than the inner diameter of the third cylinder segment 103, and the outer wall of the second cylinder segment 102 is fixedly and hermetically connected with the inner wall of the pressure-bearing cylinder 4, and the third cylinder segment 103 is hermetically connected with the rubber sleeve 5. Furthermore, the first cylinder segment 101 may be provided with a radially penetrating injection channel 11.
In addition, the first plug assembly may further include a piston disposed inside the adjustment sleeve 13, and the driving piston applies an axial pressure to the injection plug to form an axial pressure on the core to be tested, wherein the piston may have a passage for the injection line to pass through.
Specifically, the second plug assembly can extend into the barrel of the pressure-bearing barrel 4 from the second opening, and can be fixedly and hermetically connected with one end of the pressure-bearing barrel 4 with the second opening and fix the output plug 6. Specifically, the second plug assembly can be partially disposed in the second opening of the pressure-bearing barrel 4 of the holder and form a fixed sealing connection with the inner wall of the second opening, and the second plug assembly can be connected or contacted with the output plug 6, so that the position of the output plug 6 in the rubber sleeve 5 is fixed, and the second plug assembly can be matched with the injection plug 1 to apply axial stress to shale cores with different lengths. For example, the second plug assembly may include a fixed plug 3 and a second cover 2, and a second positioning sleeve 16 disposed inside the fixed plug 3, where the fixed plug 3 is in a cylindrical or cylindrical-like structure and is fixedly connected to an end of the corresponding pressure-bearing cylinder 4 having the second opening; the second sealing cover 2 can fixedly connect the fixed plug 3 and the second positioning sleeve 16 with one end of the pressure-bearing cylinder 4 with the second opening. As shown in fig. 3, the fixed plug 3 may include a fourth cylinder segment 301, a fifth cylinder segment 302 and a sixth cylinder segment 303 sequentially connected in an axial direction, where the sixth cylinder segment 303 is fixedly connected to the end of the pressure-bearing cylinder 4 having the second opening (i.e., the upper end of the pressure-bearing cylinder in fig. 1), a sealing member is disposed between the fifth cylinder segment 302 and the inner wall of the second opening of the pressure-bearing cylinder 4, and the fourth cylinder segment 303 is in sealing contact with the rubber sleeve 5. Specifically, the second sealing cover 2 is in a bottle cap shape, a fourth opening is arranged on the second sealing cover 2, threads are arranged on the outer wall of one end of the pressure-bearing cylinder 4 with the second opening, and the second sealing cover 2 is in threaded connection with one end of the pressure-bearing cylinder 4 with the second opening. Of course, the fixing plug 3 and the second positioning sleeve 16 can also be integrated here. In addition, the second sealing cover 2 can be provided with an opening for facilitating the disassembly and the assembly of the second sealing cover 2 and the pressure-bearing cylinder 4. However, the present invention is not limited thereto, and the second plug assembly may have other structures, as long as it can be fixedly and hermetically connected to the end of the pressure-bearing cylinder having the second opening and can fix the position of the output plug in the rubber cylinder.
Thus, as shown in fig. 1, the left end of the sleeve 5 may be in sealing contact with the third cylindrical section 103 of the adjusting stopper 10 of the first stopper assembly, and the right end may be in sealing contact with the fourth cylindrical section 304 of the fixed stopper 3 of the second stopper assembly.
Specifically, as shown in fig. 1, the converging component is located between the injection plug 1 and the output plug 6, and can be wrapped on the core 20 to be measured along the length direction of the outer wall of the core 20 to be measured, so as to collect fluid. As shown in fig. 6, the converging assembly may include a fluid converging net 19 and a fluid converging plate 7, the fluid converging net 19 being disposed on the fluid converging plate 7, the fluid converging net 19 being capable of converging fluid radially percolating the shale core 20 onto the fluid converging plate 7, the fluid converging plate 7 converging fluid into the production passage 18. Specifically, the converging assembly is capable of wrapping the radial circumference of the shale core 20 to be tested and transporting the liquid seeped from the inner seams of the shale core to the outside through the production passage 18 on the production plug 6 after converging. As shown in fig. 5, the converging assembly comprises a fluid converging net 19 and a fluid converging plate 7, the converging assembly is integrally of an arc-shaped structure which is attached to the circumference of the shale core 20, the fluid converging net 19 is arranged on the fluid converging plate 7 and is attached to one surface of the shale core 20, and liquid drops radially seeping from the shale core 20 are converged into liquid flows through the fluid converging net and enter the production channel 18 through the fluid converging plate 7. For example, the number of fluid manifold 19 and fluid manifold 7 may be 4-8, depending on the shale core diameter. A schematic of the shale core 20, the converging assembly, and the production plug 6 mated configuration may be as shown in fig. 7.
Specifically, as shown in fig. 1, the axial pressurizing pump 21 may be communicated with the 11 pump injection port through a pipeline, and provide a liquid for driving the first plug assembly, so as to form an axial pressure on the core 20 to be tested; the confining pressure pressurizing pump 22 can be connected with a pore canal penetrating through the side wall of the pressure-bearing cylinder 4 through a pipeline so as to facilitate the injection of confining pressure liquid into the confining pressure cavity to form confining pressure on the rock core to be measured.
Specifically, as shown in FIG. 1, the fluid permeation flow monitoring system includes an injection pump 28, a fluid reservoir tank 23, an injection fluid flow meter 25, an injection control valve 26, an injection pressure sensor 27, a production control valve, a production fluid flow meter, and a production pressure sensor. The fluid container 23, the injection fluid flowmeter 25, the injection control valve 26 and the injection channel 17 are sequentially connected through pipelines, fluid injected into the core to be detected is stored in the fluid container 23, the injection fluid flowmeter 25 is used for monitoring the flow rate of the injected fluid, the injection control valve 26 is used for controlling the opening and closing of the pipelines, the injection pump 28 can pump the fluid in the fluid container 23 into the core holder, and the injection pressure sensor 27 is arranged on the pipeline connected with the injection channel 17 by the injection control valve 26 and is configured to monitor the pressure of the injected fluid.
In this embodiment, a pressure reducing valve 24 may be further provided in the line connecting the fluid tank 23 and the injection fluid flow meter 25 for reducing pressure.
In this embodiment, the fluid tank 23 may be a liquid tank storing liquid, the injection pump 28 may be a constant speed constant pressure pump or a fluid advection pump, the injection control valve 26 may be a one-way valve, and the line ultimately leading to the injection channel 17 may be a metal pipe, such as the fluid injection pipe 14 shown in fig. 1.
As shown in fig. 1, the output channel 18, the output control valve 29 and the output fluid flowmeter are sequentially connected through a pipeline, the output control valve 29 is used for controlling opening and closing of the pipeline, the output fluid flow meter 32 is used for monitoring the flow rate of the output fluid, and the output pressure sensor 31 is disposed on the pipeline connected with the output fluid flowmeter 32 by the output control valve 29 and configured to be capable of monitoring the pressure of the output fluid, and the pipeline connected from the output channel 18 may be a metal pipe, such as the fluid output pipe 15 shown in fig. 1.
In this embodiment, the output channel, the output control valve, the output fluid flowmeter and the output pressure sensor respectively include at least one sub-output channel 18, a sub-output control valve 29, a sub-output fluid flowmeter 32 and a sub-output pressure sensor 31, and are in one-to-one correspondence with the at least one converging component, so that the flowmeter and the pressure meter connected to each output channel can respectively test the permeability of a single radial direction.
In this embodiment, the child production control valve may comprise a plug valve.
In a second exemplary embodiment of the present invention, four confluence assemblies are provided as shown in fig. 9 (only correspondence is shown and specific structural relationships are not shown) while a total corresponding to the four confluence assemblies may include four sub-output channels, four plug valves (which may be respectively denoted as plug valve a33, plug valve B34, plug valve C35, plug valve D36), four sub-output fluid flow meters (which may be respectively denoted as sub-output fluid flow meter a37, sub-output fluid flow meter B38, sub-output fluid flow meter C39, sub-output fluid flow meter D40) and four sub-output pressure sensors (which may be respectively denoted as sub-output pressure sensor a41, sub-output pressure sensor B42, sub-output pressure sensor C43, sub-output pressure sensor D44), four converging components are uniformly arranged on the outer wall of the core to be tested, and meanwhile, a pipe fitting for introducing test fluid of the core to be tested can be introduced into four different positions A1, A2, A3 and A4 of a pore canal of the core to be tested, as shown in FIG. 8, although the pipe fitting shown in the drawing is a fluid injection pipe fitting, and the radial size of the fluid injection pipe fitting is smaller than that of the pore canal in the middle of the core to be tested, in fact, the fluid injection pipe fitting can be just attached to the inner wall of the pore canal, so that the accuracy in performing the permeability test on the axially different positions (for example, the four different positions A1, A2, A3 and A4 in FIG. 8) can be ensured.
The invention further provides a method for testing the radial permeability of the full-diameter shale.
In a third exemplary embodiment of the present invention, the test method employs the test apparatus described in the first exemplary embodiment, and the test method may include:
Step one: and drying the cylindrical rock core to be tested, drilling coaxial pore channels on the rock core to be tested, then placing the rock core to be tested into a testing device, and leading one end with the pore channels towards an injection plug for testing fluid to be introduced into the pore channels.
Step two: by pressurizing the piston, axial pressurization of the core to be tested is realized.
Step three: opening the confining pressure pump, injecting confining pressure liquid into the confining pressure cavity to pressurize the rubber sleeve, and realizing confining pressure pressurization of the core to be tested.
Step four: the injection pump is started, the fluid in the fluid container tank is pumped into the clamp holder, and the flow and pressure of the injected and produced fluid are monitored through the injection fluid flowmeter, the injection pressure sensor, the produced fluid flowmeter and the produced pressure sensor.
In this embodiment, in step four, all of the output channels are open.
Step five: after the flow and pressure of the injected fluid and the produced fluid (the flow and pressure recorded by the sub-produced fluid flowmeter and the sub-produced pressure sensor corresponding to all the produced channels) are stable for 0.8 to 1.5 hours, the permeability test is carried out, the permeability is K,
Wherein h is the depth of the pore canal, P 1 is the pressure of the injected fluid, P 2 is the pressure of the produced fluid, r 1 is the radius of the pore canal, Q is the flow rate of the produced fluid, r 2 is the radius of the core to be measured, μ is the viscosity unit, and the unit is MPa.S.
Specifically, in order to test the radial penetration capability of different positions of the core to be tested, the testing method may further include the steps of:
The anisotropy of permeability in different radial orientations is expressed in a matrix form by monitoring the injection and production fluid pressure of at least one production channel separately.
Specifically, in order to obtain the heterogeneity of the core to be tested, the testing method may further include the steps of:
And (3) sequentially carrying out anisotropic measurement at different radial sections in the pore canal by using metal pipelines with different lengths, repeating the permeability test and the anisotropy test of the permeability, comparing the measurement results, and evaluating the heterogeneity of the shale core.
Specifically, to correct the correlation of the pore and fracture volumes and the permeability, the method may further include the steps of, before drilling the hole: scanning the volume ratio of the internal pores and the natural cracks in the radial direction;
After the permeability tests of different radial directions, the volume ratio of the pores and the natural cracks in different radial directions is compared and corrected with the permeability, and the correlation between the two is determined.
In a fourth exemplary embodiment of the present invention, the test method employs the test apparatus described in the second exemplary embodiment, and the test method may include the steps of:
Step 1) drying a rock core with the height of 80-100 mm and the diameter of 105mm, performing CT scanning, and evaluating the volume ratio of pores and natural cracks in the rock core in the radial direction.
Step 2) drilling a hole channel with the depth of 30-50 mm in the middle of the rock core by using an air drill, and putting the rock core into a rubber sleeve after finishing processing;
step 3) placing the rubber sleeve and the shale rock sample into a holder barrel, installing a piston, and realizing axial pressurization of the rock core in a mechanical pressurization mode, wherein the pressurization range is 0-70 MPa;
step 4) under the condition of maintaining the axial pressure, opening a confining pressure pressurizing valve, pressurizing the rubber sleeve through a confining pressure device, wherein the confining pressure can be controlled to be 0-70 MPa;
Step 5) opening a radial outflow plug valve, starting a fluid advection pump, pumping liquid in a liquid storage tank into a clamp holder through a metal pipeline by flowing through a fluid inlet end of an upper end piston, and starting to perform permeability test after the pressure and the flow rate of the inlet end and the outlet end are stabilized for 1h, and recording by a pressure gauge and recording by an outflow pressure gauge;
Step 6) opening a radial outflow channel valve, and starting to record data after the pressurized and injected fluid is stabilized for 1h, wherein the axial fixed pressure is 6.90MPa, 10.35MPa, 13.80MPa, 17.25MPa, 20.7MPa, 27.6MPa, 34.5MPa, 41.4MPa, 48.3MPa, 55.2MPa and 62.1MPa, and the radial fixed pressure is 6.90MPa, 10.35MPa, 13.80MPa and 17.25MPa respectively. And on the basis of radial pressurization, the radial flow capacity test of shale cores with injection flow rates of 2ml/min, 4ml/min, 6ml/min, 8ml/min and 10ml/min is carried out. Recording the injection pressure P Pouring 2, the radial fluid outlet flow Q and the radial fluid outlet pressure P Diameter of the pipe in radial fluid, and obtaining a relation diagram of the radial pressure and the outflow flow, wherein the radial permeability can be corrected by referring to a radial Darcy formula:
Wherein:
r 1 -machining the radius of the hole, mm;
r 2 -core radius, mm;
p Diameter of the pipe -radial fluid discharge pressure, MPa;
p Pouring 2 -fluid injection pressure, MPa;
h, hole depth, mm;
Mu-fluid viscosity, MPa.S.
Step 7) by controlling the plug valve ABCD, first the plug valve a is opened, the plug valve BCD is closed, and the outlet flow Q A is measured by the sub-product fluid flow meter a. And then the plug valve B is opened, the plug valve ACD is closed, and the outlet flow Q B is measured through the subsidiary fluid flow meter B. The plug valve C is opened, the plug valve ABD is closed, and the outlet flow Q C is measured by the child fluid flow meter C. The plug valve D is opened, the plug valve ABC is closed, and the outlet flow Q D is measured by the child fluid flow meter D. ABCD permeability K may be expressed by the radial darcy formula in step 6). Wherein the anisotropy of permeability is expressed by a 2-order matrix of permeability tensors:
Wherein:
the permeability in the k xx -A direction, D (units);
k xy -B permeability, D (units);
k yx -C permeability, D (units);
the permeability in the k yy -D direction, D (units);
and 8) sequentially carrying out anisotropic measurement at points A1-A4 by using metal pipelines with different lengths, repeating the step 6) and the step 7), and comparing measurement results, so that the heterogeneity of the shale core can be evaluated.
And 9) comparing and correcting the pore and crack volume ratio parameters in different radial directions with the permeability in each radial direction, and determining the correlation between the pore and crack volumes in different radial directions and the permeability of the full-diameter core.
In summary, the method and the device for testing the radial permeability of the full-diameter shale have the following advantages: the testing device realizes triaxial stress loading and unloading in the testing process, and has good sealing performance and high testing efficiency; the testing method can evaluate the sensitivity of triaxial stress to the permeability of the shale core, test the permeability of different fluids to different radial directions, represent the anisotropy of the permeability in a tensor form, and measure the radial permeability in different axial lengths.
Although the present invention has been described above by way of the combination of the exemplary embodiments, it should be apparent to those skilled in the art that various modifications and changes can be made to the exemplary embodiments of the present invention without departing from the spirit and scope defined in the appended claims.
Claims (8)
1.A testing device for the radial permeability of full-diameter shale is characterized by comprising a core holder, an axial booster pump, a confining pressure booster pump and a fluid seepage monitoring system, wherein,
The core holder comprises a first plug assembly, a pressure-bearing cylinder and a second plug assembly which are coaxially and sequentially connected, a rubber sleeve arranged in the pressure-bearing cylinder, an injection plug, at least one confluence assembly and a production plug which are arranged in the rubber sleeve, wherein the injection plug, the production plug and the rubber sleeve enclose a closed space for placing a core to be tested,
The pressure-bearing cylinder comprises a first opening and a second opening at two ends;
The first plug assembly is in sealing connection with the first opening and is configured to be capable of transmitting axial pressure to the injection plug, and the second plug assembly is in sealing connection with the second opening and is configured to be capable of fixing the output plug;
The rubber sleeve is respectively connected with the first plug assembly and the second plug assembly in a sealing way, and forms a closed confining pressure cavity with the first plug assembly, the pressure-bearing cylinder and the second plug assembly;
the injection plug is provided with an injection channel for injecting fluid into the core to be tested, and the output plug is provided with an output channel for discharging the fluid;
The at least one converging component is arranged along the length direction of the outer wall of the rock core to be tested and is wrapped on the rock core to be tested so as to collect fluid to the output channel;
The axial pressurizing pump is used for driving the first plug assembly to apply axial pressure to the injection plug so as to form axial pressure on the core to be tested;
The confining pressure pressurizing pump is communicated with the confining pressure cavity and is configured to be capable of injecting confining pressure liquid into the confining pressure cavity so as to form confining pressure on the rock core to be tested;
The fluid seepage monitoring system comprises an injection pump, a fluid container tank, an injection fluid flowmeter, an injection control valve, an injection pressure sensor, a production control valve, a production fluid flowmeter and a production pressure sensor, wherein,
The fluid container tank, the injection fluid flowmeter, the injection control valve and the injection channel are sequentially connected through pipelines, fluid injected into the core to be tested is stored in the fluid container tank, the injection fluid flowmeter is used for monitoring the flow of the injected fluid, and the injection control valve is used for controlling the opening and closing of the pipelines;
the injection pump can pump the fluid in the fluid container tank into the core holder;
An injection pressure sensor is disposed on a line connecting the injection control valve with the injection passage and configured to be capable of monitoring a pressure of the injection fluid;
The output channel, the output control valve and the output fluid flowmeter are sequentially connected through pipelines, the output control valve is used for controlling the opening and closing of the pipelines, and the output fluid flowmeter is used for monitoring the flow of output fluid;
a production pressure sensor disposed on a line connecting the production control valve with the production fluid flow meter and configured to monitor a pressure of the production fluid;
the first plug assembly comprises a first sealing cover, an adjusting plug, an adjusting sleeve and a first adjusting sleeve, wherein,
One end of the adjusting plug is in sealing connection with the first opening end of the pressure-bearing cylinder, and the other end of the adjusting plug is in sealing connection with the first sealing cover;
one end of the first positioning sleeve is connected with the injection plug, and the other end of the first positioning sleeve is connected with the adjusting sleeve;
The first positioning sleeve and the adjusting sleeve are arranged in the adjusting plug and the first sealing cover and can be mutually matched to adjust and fix the axial position of the injection plug;
the first plug assembly comprises a piston arranged inside, the piston is driven to apply axial pressure to the injection plug so as to form axial pressure on the core to be tested, and a channel for the injection pipeline to pass through is formed in the piston.
2. The device for testing the radial permeability of the full-diameter shale according to claim 1, wherein a first cavity and a second cavity which are distributed along the first opening to the second opening and are mutually isolated can be formed between the adjusting sleeve and the adjusting plug, a pumping channel which is used for communicating the first cavity with the outside is further arranged on the adjusting plug, the pumping channel is connected with the axial pressurizing pump through a pipeline, and after the axial pressurizing liquid is injected, the adjusting sleeve and the first positioning sleeve are pushed to apply axial pressure to the injecting plug so as to form axial pressure on a rock core to be tested, and the first cavity is sealed under the condition that the pumping channel is blocked.
3. The apparatus of claim 1, wherein the second plug assembly comprises a fixed plug, a second cover, and a second positioning sleeve disposed within the fixed plug,
The fixed plug is fixedly connected with the second opening;
The second sealing cover can fixedly connect the fixed plug and the second positioning sleeve with the second opening end of the pressure-bearing cylinder, wherein the fixed plug is in sealing connection with the pressure-bearing cylinder.
4. The full diameter shale radial penetration testing apparatus of claim 1, wherein the production channel, production control valve, production fluid flow meter and production pressure sensor comprise at least one sub-production channel, sub-production control valve, sub-production fluid flow meter and sub-production pressure sensor, respectively, in one-to-one correspondence with the at least one converging assembly.
5. A method for testing radial permeability of full-diameter shale by using the testing device as claimed in any one of claims 1 to 4, wherein the testing method comprises the following steps:
Drying a cylindrical rock core to be tested, drilling a coaxial pore canal on the rock core to be tested, then placing the rock core to be tested into a testing device, and leading one end with the pore canal towards an injection plug for testing fluid to flow into the pore canal;
The piston is pressurized, so that axial pressurization of the core to be tested is realized;
opening a confining pressure pump, injecting confining pressure liquid into the confining pressure cavity to pressurize the rubber sleeve, and realizing confining pressure pressurization of the core to be tested;
starting an injection pump, pumping the fluid in the fluid container tank into the clamp holder, and monitoring the flow and pressure of the injected and produced fluid through an injection fluid flowmeter, an injection pressure sensor, a produced fluid flowmeter and a produced pressure sensor;
after the flow and pressure of the injected fluid and the produced fluid are stable for 0.8-1.5 h, the permeability test is carried out, and the permeability is measured Wherein h is the depth of the pore canal, P 1 is the pressure of the injected fluid, P 2 is the pressure of the produced fluid, r 1 is the radius of the pore canal, r 2 is the radius of the core to be measured, Q is the flow rate of the produced fluid, and mu is the viscosity of the fluid.
6. The method for testing the radial penetration capacity of full diameter shale of claim 5, further comprising the steps of:
The anisotropy of the permeability of the core to be tested in different radial directions is tested by monitoring the injection and production fluid pressure of at least one sub-output channel independently, and the anisotropy of the permeability is expressed in a matrix form of the permeability.
7. The method of testing the radial penetration of full diameter shale of claim 6, further comprising the steps of:
And (3) sequentially carrying out anisotropic measurement at different radial sections in the pore canal by using metal pipelines with different lengths, repeating the permeability test and the anisotropy test of the permeability, comparing the measurement results, and evaluating the heterogeneity of the shale core.
8. The method for testing the radial penetration of full diameter shale of claim 5, further comprising the step of, prior to drilling the wellbore: scanning the volume ratio of the internal pores and the natural cracks in the radial direction;
After the permeability of the core to be tested in different radial directions is tested, the volume ratio of the pores and the natural cracks in the different radial directions is compared and corrected with the permeability, and the correlation between the pores and the natural cracks is determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010292115.8A CN111337411B (en) | 2020-04-14 | 2020-04-14 | Method and device for testing radial permeability of full-diameter shale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010292115.8A CN111337411B (en) | 2020-04-14 | 2020-04-14 | Method and device for testing radial permeability of full-diameter shale |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111337411A CN111337411A (en) | 2020-06-26 |
| CN111337411B true CN111337411B (en) | 2024-05-28 |
Family
ID=71184859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010292115.8A Active CN111337411B (en) | 2020-04-14 | 2020-04-14 | Method and device for testing radial permeability of full-diameter shale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111337411B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111948111B (en) * | 2020-08-04 | 2024-06-04 | 中国石油天然气股份有限公司 | Full-diameter core holder |
| CN112304849A (en) * | 2020-11-13 | 2021-02-02 | 北京拓普莱博油气田开发技术研究院 | Method for testing gas permeability of irregular-shaped loose rock sample |
| CN112378832B (en) * | 2021-01-15 | 2021-03-30 | 成都理工大学 | Drilling fluid dynamic damage evaluation instrument based on glass core |
| CN112855089B (en) * | 2021-02-01 | 2021-11-30 | 重庆科技学院 | Application method for calculating effective permeability of two-dimensional sand-packed model |
| CN112903566B (en) * | 2021-03-02 | 2023-05-12 | 东北石油大学 | Full-diameter rock core radial permeability testing tool |
| CN113092334A (en) * | 2021-03-19 | 2021-07-09 | 中国神华煤制油化工有限公司 | Multi-stratum permeability tensor measuring device |
| CN115684219B (en) * | 2021-07-29 | 2024-04-26 | 中国石油天然气集团有限公司 | Sea shale pressured hydration CT scanning core holder and experimental method |
| CN113605885A (en) * | 2021-08-20 | 2021-11-05 | 中海石油(中国)有限公司海南分公司 | Simulation device and simulation method for micro-huff and puff of drilling fluid in fractured stratum |
| CN113484223B (en) * | 2021-08-26 | 2023-02-03 | 中国石油大学(北京) | Full-diameter core holder |
| CN114136864B (en) * | 2021-12-24 | 2023-12-08 | 国家能源集团宁夏煤业有限责任公司 | Method, storage medium and system for determining permeability of coal and rock |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5263360A (en) * | 1992-04-17 | 1993-11-23 | Halliburton Company | Low permeability subterranean formation testing methods and apparatus |
| CN104594885A (en) * | 2014-10-16 | 2015-05-06 | 北京科技大学 | Measuring test device and method for seepage law of shale gas in microfractures |
| CN105675469A (en) * | 2016-01-25 | 2016-06-15 | 中国矿业大学 | Full-automatic test system and measurement method for gas permeability of rock |
| CN107063963A (en) * | 2016-12-28 | 2017-08-18 | 浙江海洋大学 | A kind of compact reservoir microcrack extension and the test device and method of seepage flow characteristics |
| CN110242290A (en) * | 2019-06-25 | 2019-09-17 | 中国石油集团川庆钻探工程有限公司 | A kind of shale core stratification seam flow simulating evaluating apparatus and method |
| CN110296921A (en) * | 2018-03-21 | 2019-10-01 | 中国石油化工股份有限公司 | The test device and test method of steady state method shale gas permeability under reservoir conditions |
| CN211978636U (en) * | 2020-04-14 | 2020-11-20 | 中国石油天然气集团有限公司 | Testing device for full-diameter shale radial permeability |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10845291B2 (en) * | 2017-05-16 | 2020-11-24 | King Fahd University Of Petroleum And Minerals | Radial core flooding apparatus and method for analysis of static and/or dynamic properties of reservoir rock |
| US10801943B2 (en) * | 2017-06-26 | 2020-10-13 | China University Of Petroleum-Beijing | Apparatus and method for measuring apparent permeability of tight rock core |
| CN107764718A (en) * | 2017-11-14 | 2018-03-06 | 北京科技大学 | Fractured shale gas-water phases flowing fracture condudtiviy evaluating apparatus and method |
-
2020
- 2020-04-14 CN CN202010292115.8A patent/CN111337411B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5263360A (en) * | 1992-04-17 | 1993-11-23 | Halliburton Company | Low permeability subterranean formation testing methods and apparatus |
| CN104594885A (en) * | 2014-10-16 | 2015-05-06 | 北京科技大学 | Measuring test device and method for seepage law of shale gas in microfractures |
| CN105675469A (en) * | 2016-01-25 | 2016-06-15 | 中国矿业大学 | Full-automatic test system and measurement method for gas permeability of rock |
| CN107063963A (en) * | 2016-12-28 | 2017-08-18 | 浙江海洋大学 | A kind of compact reservoir microcrack extension and the test device and method of seepage flow characteristics |
| CN110296921A (en) * | 2018-03-21 | 2019-10-01 | 中国石油化工股份有限公司 | The test device and test method of steady state method shale gas permeability under reservoir conditions |
| CN110242290A (en) * | 2019-06-25 | 2019-09-17 | 中国石油集团川庆钻探工程有限公司 | A kind of shale core stratification seam flow simulating evaluating apparatus and method |
| CN211978636U (en) * | 2020-04-14 | 2020-11-20 | 中国石油天然气集团有限公司 | Testing device for full-diameter shale radial permeability |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111337411A (en) | 2020-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111337411B (en) | Method and device for testing radial permeability of full-diameter shale | |
| CN209875145U (en) | Oil gas well cement sheath sealing integrity testing arrangement | |
| CN107631973B (en) | Multi-method same-machine testing device for permeability measurement of ultra-low permeability rock sample | |
| CN110501272B (en) | Method for simultaneously testing porosity and permeability of porous rock under triaxial stress and pore pressure conditions | |
| CN104374683A (en) | Device and method for testing core pore compressibility | |
| CN108956854B (en) | Device for evaluating plugging performance of temporary plugging steering fluid and testing method thereof | |
| CN105527379A (en) | Three-hole rock core kettle and ultra-low-permeability reservoir fluid damage evaluation test apparatus and method | |
| CN107725046A (en) | The apparatus and method of capillary force during a kind of evaluation reservoir water | |
| CN104034644A (en) | Multiphase seepage medium triaxial stress seepage coupling test device capable of rapidly measuring porosity | |
| CN211978636U (en) | Testing device for full-diameter shale radial permeability | |
| CN109358079B (en) | Device and method for measuring sea area argillaceous silt reservoir structure change by combining CT technology | |
| CN106018239A (en) | Method and device for measuring permeability coefficients of stratums at different depths in field | |
| CN111272636A (en) | Device and method for measuring rock porosity under different kinds of stress | |
| CN104931403B (en) | Anisotropic rock degree of injury test device and its test method | |
| CN115487887A (en) | High-temperature high-pressure micro-nanofluidic chip holder device and temperature and pressure control method thereof | |
| CN211206162U (en) | Device for researching penetration rule of drilling and completion fluid along stratum around well | |
| CN108196002B (en) | Performance evaluation device and test method for temporary plugging steering fluid for fracture acidizing | |
| CN113607620B (en) | Experimental device and method for carbon dioxide directional fracturing and permeability testing | |
| CN111058832A (en) | Experimental device and method for simulating fracture of two well cementation interfaces | |
| CN111157428A (en) | Method for measuring permeability of rock before and after grouting | |
| CN112443288A (en) | Experimental device for evaluating sealing capability of two interfaces of well cementation cement sheath | |
| CN113982552B (en) | Experimental device and method for representing energy increase from crack to matrix depth | |
| CN114018786A (en) | Clamping device and system for measuring permeability coefficient of low-permeability soil | |
| CN212180570U (en) | Spontaneous imbibition measuring device of high-pressure natural gas-water system rock core | |
| CN208872635U (en) | A kind of building ground infiltration detection device |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |