CN109115670B - Pressure generating device and rock core permeability measuring device - Google Patents
Pressure generating device and rock core permeability measuring device Download PDFInfo
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- CN109115670B CN109115670B CN201811200617.2A CN201811200617A CN109115670B CN 109115670 B CN109115670 B CN 109115670B CN 201811200617 A CN201811200617 A CN 201811200617A CN 109115670 B CN109115670 B CN 109115670B
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- 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
Abstract
The invention discloses a pressure generating device and a rock core permeability measuring device, which relate to the technical field of petroleum exploration and development, wherein the pressure generating device comprises: the high-pressure-resistant tank body is internally provided with a piston, and the piston divides the interior of the high-pressure-resistant tank body into a first cavity and a second cavity which are independent; the booster pump can be communicated with the first cavity; a liquid injection pump communicable with the second cavity; the high-pressure resistant pipe can be communicated with the second cavity, and the high-pressure resistant pipe has a preset height in the vertical direction; the lifting device is used for adjusting the height of the high-pressure-resistant tank body; the height measuring device is used for measuring the preset height of the high-pressure resistant pipe in the vertical direction. The high-precision pressure can be generated within a large pressure range, so that the low-permeability core can be accurately tested.
Description
Technical Field
The invention relates to the technical field of petroleum exploration and development, in particular to a pressure generating device and a rock core permeability measuring device.
Background
The permeability of the carbonate rock reservoir is generally high due to the fact that cracks or holes of the carbonate rock reservoir are developed sufficiently, and under the condition of high permeability, higher requirements on stability and accuracy of pressure difference are provided for measuring the permeability, so that the permeability of the carbonate rock core is difficult to measure accurately.
Currently, many researchers have studied methods for measuring permeability of carbonate reservoirs. The common application is a constant pressure difference method, and the used pump source is a constant flow pump or a precise pump. However, the precision of the pump with large confining pressure is not high enough, and the precision pump cannot meet the requirement of experiment pressure, so that the pump is not an ideal pump source, and the accuracy of the experiment is inevitably reduced. In addition, the experimental pressure in the constant pressure difference method is mainly measured by a pressure-resistant pressure gauge, the minimum scale of the conventional pressure-resistant pressure gauge is 1000Pa, the precision is poor, the permeability cannot be measured more accurately if enough accurate pressure measurement data cannot be obtained, the stable time is long, time and energy are consumed, the data precision cannot be guaranteed, a large error is caused, and the actual requirement cannot be met. In order to obtain more stable and accurate pressure difference to enable the permeability of the carbonate rock core to be more accurate, the invention provides a novel and accurate carbonate rock core permeability measuring device.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a pressure generating device and a core permeability measuring device, which can generate a high-precision pressure in a large pressure range, so as to perform an accurate test on a low-permeability core.
The specific technical scheme of the embodiment of the invention is as follows:
a pressure generating device, the pressure generating device comprising:
the high-pressure-resistant tank body is internally provided with a piston, and the piston divides the interior of the high-pressure-resistant tank body into a first cavity and a second cavity which are independent;
the booster pump can be communicated with the first cavity;
a liquid injection pump communicable with the second cavity;
the high-pressure resistant pipe can be communicated with the second cavity, and the high-pressure resistant pipe has a preset height in the vertical direction;
the lifting device is used for adjusting the height of the high-pressure-resistant tank body;
the height measuring device is used for measuring the preset height of the high-pressure resistant pipe in the vertical direction.
Preferably, the lifting device includes: a base; the screw rod is arranged on the base along the vertical direction; the gear mechanism is arranged on the screw rod and can drive the lifting platform to ascend or descend.
Preferably, high pressure resistant jar body sets up on the lift platform, height measuring device includes: the laser range finder is arranged on the high-pressure-resistant tank body; the laser reflecting surface guide rail is arranged on the base and extends along the vertical direction; the laser range finder comprises a laser reflecting surface, a laser range finder and a laser beam guide rail, wherein the laser reflecting surface is arranged on the laser reflecting surface guide rail, the laser reflecting surface can lift along the laser reflecting surface guide rail, and the laser range finder faces the laser reflecting surface.
Preferably, the gear mechanism includes: the side wall of the turning piece is provided with a thread matched with the texture of the side wall of the turning piece; and the rotating rod and the screw rod are in limited shell, and the shell is connected with the lifting platform.
Preferably, the side wall of the high-pressure-resistant tank body is provided with a visible window.
Preferably, the height of the laser reflecting surface is the same as that of the output port at the tail end of the high-pressure resistant pipe.
Preferably, the high pressure resistant pipe is flexible; the pressure range of the booster pump is between 0 and 50Mpa, and the precision is 10 Kpa.
Preferably, a first valve is arranged between the booster pump and the first cavity; a second valve is arranged between the liquid injection pump and the second cavity; and a third valve is arranged between the high-pressure resistant pipe and the second cavity.
A core permeability measurement device, comprising: a core holder for mounting a core, the core holder having an inlet end, an outlet end, and a confining pressure connection port; a pressure generating device as claimed in any one of the preceding claims, wherein a high pressure resistant tube is connected to the inlet end; the booster pump can be communicated with the confining pressure connecting port.
Preferably, the core permeability measuring apparatus further comprises: a flow meter connected to the outlet end; a back pressure valve connected with the flowmeter; and the liquid collecting device is connected with the back pressure valve.
The technical scheme of the invention has the following remarkable beneficial effects:
when high-precision pressure under the premise of large pressure needs to be generated, a large pressure is input into a first cavity in the high-pressure-resistant tank body through the booster pump, and liquid is injected into a second cavity in the high-pressure-resistant tank body and the high-pressure-resistant pipe through the liquid injection pump. The height of the high-pressure-resistant pipe in the vertical direction is measured according to the height measuring device, the pressure generated by liquid in the high-pressure-resistant pipe is obtained through conversion of the preset height, the pressure output by the output port at the tail end of the high-pressure-resistant pipe is the pressure generated by the liquid in the high-pressure-resistant pipe and the high pressure input by the booster pump, the height of the high-pressure-resistant tank body is adjusted through the lifting device, the preset height of the high-pressure-resistant pipe in the vertical direction can be changed, and therefore the pressure generated by the liquid in the high-pressure-resistant pipe is. The liquid can be water in general, and the preset height of the high-pressure resistant pipe in the vertical direction can be adjusted at the accuracy of 1mm by the lifting device and the height measuring device, so that the adjustment accuracy of the pressure generated by the liquid in the high-pressure resistant pipe is 10pa, and the high-accuracy pressure on the premise of high pressure can be generated by the mode.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.
FIG. 1 is a schematic perspective view of a pressure generating device in an embodiment of the present invention;
FIG. 2 is a front view of a pressure generating device in an embodiment of the present invention;
FIG. 3 is a side view of a pressure generating device in an embodiment of the present invention;
FIG. 4 is a top view of a pressure generating device in an embodiment of the present invention;
FIG. 5 is a schematic view of a core permeability measurement apparatus in an embodiment of the invention.
Reference numerals of the above figures:
1. a high pressure resistant tank body; 11. a piston; 12. a first cavity; 13. a second cavity; 17. a visible window; 2. a booster pump; 3. a liquid injection pump; 4. a high pressure resistant tube; 5. a lifting device; 51. a base; 52. a screw; 53. a gear mechanism; 531. rotating the rod; 54. a lifting platform; 55. a hand crank; 56. a protective sleeve; 6. a height measuring device; 61. a laser range finder; 62. a laser reflecting surface guide rail; 63. a laser reflecting surface; 7. a first valve; 8. a second valve; 9. a third valve; 10. a fourth valve; 14. a fifth valve; 15. a sixth valve; 16. a three-way valve; 20. a core holder; 201. an inlet end; 202. an outlet end; 203. a confining pressure connection port; 30. a flow meter; 40. a back pressure valve; 50. a liquid collection device.
Detailed Description
The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to generate a high precision pressure in a large pressure range, so as to perform a precise test on a low permeability core, a pressure generating device is proposed in the present application, fig. 1 is a schematic perspective view of the pressure generating device in an embodiment of the present invention, fig. 2 is a front view of the pressure generating device in an embodiment of the present invention, fig. 3 is a side view of the pressure generating device in an embodiment of the present invention, fig. 4 is a top view of the pressure generating device in an embodiment of the present invention, and as shown in fig. 1 to 4, the pressure generating device may include: the high-pressure-resistant tank comprises a high-pressure-resistant tank body 1, wherein a piston 11 is arranged in the high-pressure-resistant tank body 1, and the piston 11 divides the interior of the high-pressure-resistant tank body 1 into a first cavity 12 and a second cavity 13 which are independent; the booster pump 2 is communicated with the first cavity 12; a liquid injection pump 3, the liquid injection pump 3 being capable of communicating with the second cavity 13; the high-pressure resistant pipe 4 can be communicated with the second cavity 13, and the high-pressure resistant pipe 4 has a preset height in the vertical direction; the lifting device 5 is used for adjusting the height of the high-pressure resistant tank body 1; and the height measuring device 6 is used for measuring the preset height of the high-pressure resistant pipe 4 in the vertical direction.
When high-precision pressure under the premise of large pressure needs to be generated, a large pressure is input into the first cavity 12 in the high-pressure-resistant tank body 1 through the booster pump 2, and liquid is injected into the second cavity 13 and the high-pressure-resistant pipe 4 in the high-pressure-resistant tank body 1 through the liquid injection pump 3. The height measuring device 6 measures and obtains the preset height of the high-pressure resistant pipe 4 in the vertical direction, the pressure generated by liquid in the high-pressure resistant pipe 4 is obtained through conversion of the preset height, the pressure output from the tail end output port of the high-pressure resistant pipe 4 is the pressure generated by the liquid in the high-pressure resistant pipe 4 and the large pressure input by the booster pump 2, the height of the high-pressure resistant tank body 1 is adjusted through the lifting device 5, the preset height of the high-pressure resistant pipe 4 in the vertical direction can be changed, and therefore the pressure generated by the liquid in the high-pressure resistant pipe 4 can be adjusted. Generally, water can be used as the liquid, and the lifting device 5 and the height measuring device 6 can adjust the preset height of the high-pressure resistant pipe 4 in the vertical direction with the precision of 1mm, so that the adjustment precision of the pressure generated by the liquid in the high-pressure resistant pipe 4 is 10pa, and the high-precision pressure under the condition of large pressure can be generated by the mode.
In order to better understand the pressure generating device of the present application, it will be further explained and illustrated below. As shown in fig. 1 to 4, the high pressure resistant tank 1 is arranged in a vertical direction, a piston 11 is arranged in the high pressure resistant tank 1, the piston 11 can slide in the vertical direction, the piston 11 divides the interior of the high pressure resistant tank 1 into a first cavity 12 and a second cavity 13 which are independent, wherein the first cavity 12 is located above the second cavity 13.
In order to enable an operator to externally observe the position of the piston 11 after moving, a visual window 17 is arranged on the side wall of the high-pressure resistant tank body 1, the position of the piston 11 can be observed through the visual window 17, when the piston 11 moves downwards to be close to the bottom, the liquid needs to be additionally injected into the second cavity 13 through the liquid injection pump 3 again, so that the liquid in the second cavity 13 is supplemented, and the piston 11 moves upwards.
As shown in fig. 1 to 4, the booster pump 2 can communicate with the first cavity 12, and specifically, the booster pump 2 is connected to the upper end of the high pressure resistant tank 1. A first valve 7 is arranged between the booster pump 2 and the first cavity 12, and the connection and disconnection between the booster pump 2 and the first cavity 12 are controlled through the first valve 7. The booster pump 2 is used to provide a large amount of pressure to the first cavity 12. For example, the booster pump 2 has a pressure range of 0 to 50Mpa with an accuracy of 10Kpa, which cannot be adjusted to a pressure with an accuracy of 10Kpa or less.
As shown in fig. 1 to 4, the liquid injection pump 3 can communicate with the second cavity 13, and specifically, the liquid injection pump 3 is connected to the lower end of the high pressure resistant tank 1. The second valve 8 is arranged between the liquid injection pump 3 and the second cavity 13, and the connection and disconnection between the liquid injection pump 3 and the second cavity 13 are controlled through the second valve 8. The liquid injection pump 3 is used to pump liquid into the second cavity 13, and when the piston 11 is moved down to near the bottom, the liquid injection pump 3 can replenish the second cavity 13 with liquid.
As shown in fig. 1 to 4, the high pressure resistant pipe 4 can communicate with the second cavity 13, and specifically, the high pressure resistant pipe 4 is connected to the lower end of the high pressure resistant tank 1. And a third valve 9 is arranged between the high-pressure resistant pipe 4 and the second cavity 13, and the third valve 9 is used for controlling the connection and disconnection between the high-pressure resistant pipe 4 and the second cavity 13. High-pressure resistant pipe 4 has the height of predetermineeing in the vertical direction, after liquid fills high-pressure resistant pipe 4, this height of predetermineeing can be for the exit end 202 of high-pressure resistant pipe 4 to the difference of high-pressure resistant pipe 4 top in the vertical direction, liquid gravity can produce certain pressure in high-pressure resistant pipe 4, through changing the size of predetermineeing the height, just can change the size that liquid gravity produced pressure in high-pressure resistant pipe 4, owing to predetermine the height and can finely tune, consequently, the size of producing pressure in high-pressure resistant pipe 4 also can finely tune, so, just can reach the purpose of high accuracy. In order to facilitate the high pressure resistant pipe 4 to change the preset height, the high pressure resistant pipe 4 may have scalability.
The lifting device 5 is used for adjusting the height of the high-pressure-resistant tank body 1, so that the preset height is changed. As shown in fig. 1 to 4, the lifting device 5 may include: a base 51; a screw 52 provided on the base 51 in the vertical direction; a gear mechanism 53 provided on the screw 52, and a lifting platform 54, wherein the gear mechanism 53 can drive the lifting platform 54 to ascend or descend. The gear mechanism 53 may include: a direction-changing piece screwed on the screw rod 52, wherein the side wall of the direction-changing piece is provided with a texture extending along the vertical direction, the rotating rod 531 extends along the horizontal direction, and the side wall of the rotating rod 531 is provided with a thread matched with the texture of the side wall of the direction-changing piece; the shell for limiting the rotating rod 531 and the screw rod 52 is connected with the lifting platform 54. In order to facilitate the operator to rotate the rotating lever 531, a hand lever 55 is connected to the rotating lever 531. When rotating crank 55, the horizontal migration of dwang 531 passes through the texture and drives the diversion and rotate, and the diversion rotates on screw rod 52 to produce the displacement of vertical direction between diversion and the screw rod 52, so, diversion drive casing, lift platform 54 can reciprocate on vertical direction. By adopting the structure, the up-down moving distance of the lifting platform 54 in the lifting device 5 can be accurately controlled, and the lifting device has the advantages of labor saving in operation, firmness, durability and self-locking of the lifting device 5. In order to protect the screw thread on the screw 52, a protective sleeve 56 is sleeved on the screw 52 at the upper part of the shell.
As shown in fig. 1 to 4, the high pressure resistant tank 1 is disposed on the lifting platform 54, and the height measuring device 6 includes: the laser range finder 61 is arranged on the high-pressure resistant tank body 1; a laser reflecting surface guide rail 62 arranged on the base 51, the laser reflecting surface guide rail 62 extending along the vertical direction; a laser reflecting surface 63 provided on the laser reflecting surface guide rail 62, the laser reflecting surface 63 being movable up and down along the laser reflecting surface guide rail 62, the laser rangefinder 61 facing the laser reflecting surface 63. Can measure through laser range finder 61 and laser reflecting surface 63 and obtain the height that the high pressure resistant jar body 1 rises and descends, simultaneously, highly set the same with the terminal delivery outlet height of high-pressure resistant pipe 4 of the height of laser reflecting surface 63, so, can be convenient for laser range finder 61 measure and obtain the height of predetermineeing of high-pressure resistant pipe 4 on the vertical direction.
When water is used as the liquid, the height measuring device 6 can adjust the preset height of the high pressure resistant pipe 4 in the vertical direction with the accuracy of 1mm, and therefore, the adjustment accuracy of the pressure generated by the liquid in the high pressure resistant pipe 4 is 10 pa. For example, the booster pump 2 has a pressure of 20Mpa, the pressure generated by the liquid in the high pressure resistant pipe 4 is 10pa, and the accuracy of the final output pressure is 1000 times higher than that of the booster pump 2 alone, and at least 50 times higher than that of other conventional pumps. High-precision pressure under the condition of large pressure can be generated by the mode.
After the present application, a core permeability measuring apparatus is further provided, fig. 5 is a schematic diagram of the core permeability measuring apparatus in an embodiment of the present invention, and as shown in fig. 5, the core permeability measuring apparatus may include: a core holder 20 for mounting a core, the core holder 20 having an inlet end 201, an outlet end 202 and a confining pressure connection port 203; in any of the above-described pressure generating devices, the high pressure resistant pipe 4 of the pressure generating device is connected to the inlet end 201; the booster pump 2 can be in communication with the confining pressure connection port 203. The booster pump 2 is connected to the first valve 7 and the confining pressure connection port 203 via a three-way valve 16. The inlet end 201 of the core holder 20 is provided with a fourth valve 10 and the outlet end 202 of the core holder 20 is provided with a fifth valve 14. To facilitate measuring the flow of liquid exiting the outlet end 202 of the core holder 20 and controlling the pressure difference between the inlet end 201 and the outlet end 202 of the core holder 20, the core permeability measuring device may further comprise: a flow meter 30 connected at the outlet end 202; a back-pressure valve 40 connected to the flow meter 30; a liquid collection device 50 connected to the back pressure valve 40. The liquid collection device 50 is for collecting liquid discharged from the outlet end 202 of the core holder 20 and a sixth valve 15 may be provided between the flow meter 30 and the back pressure valve 40.
In a specific embodiment, the core holder 20 is required to obtain a confining pressure of 20Mpa and a pressure difference of 5.30kpa, the confining pressure of the core holder 20 and the pressure of the first cavity 12 are increased to 20Mpa by the booster pump 2, and then the lifting device 5 and the height measuring device 6 are adjusted to set the preset height of the high pressure resistant pipe 4 to 53.0cm, at which the confining pressure of 20Mpa and the pressure difference of 5.30kpa are obtained for the core holder 20.
The device can provide continuous injection pressure, can be applied to the accurate test of low permeability core and other seepage experiments, has simple and reasonable structure, reliability and convenient use, can give consideration to confining pressure and precision, and can greatly reduce the labor intensity.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (9)
1. A core permeability measurement device, comprising:
a core holder for mounting a core, the core holder having an inlet end, an outlet end, and a confining pressure connection port;
a pressure generating device, the pressure generating device comprising: the high-pressure-resistant tank body is internally provided with a piston, and the piston divides the interior of the high-pressure-resistant tank body into a first cavity and a second cavity which are independent; the booster pump can be communicated with the first cavity; a liquid injection pump communicable with the second cavity; the high-pressure resistant pipe can be communicated with the second cavity, and the high-pressure resistant pipe has a preset height in the vertical direction; the lifting device is used for adjusting the height of the high-pressure-resistant tank body; the height measuring device is used for measuring the preset height of the high-pressure resistant pipe in the vertical direction; a high pressure resistant pipe in the pressure generating device is connected with the inlet end; the booster pump is communicated with the confining pressure connecting port; the pressure input by the confining pressure connection port can act on the outlet end.
2. The core permeability measurement device of claim 1, wherein the lifting device comprises: a base; the screw rod is arranged on the base along the vertical direction; the gear mechanism is arranged on the screw rod and can drive the lifting platform to ascend or descend.
3. The core permeability measurement device of claim 2, wherein the high pressure resistant tank is disposed on the lift platform, the height measurement device comprising: the laser range finder is arranged on the high-pressure-resistant tank body; the laser reflecting surface guide rail is arranged on the base and extends along the vertical direction; the laser range finder comprises a laser reflecting surface, a laser range finder and a laser beam guide rail, wherein the laser reflecting surface is arranged on the laser reflecting surface guide rail, the laser reflecting surface can lift along the laser reflecting surface guide rail, and the laser range finder faces the laser reflecting surface.
4. The core permeability measurement device of claim 2, wherein the gear mechanism comprises: the side wall of the turning piece is provided with a thread matched with the texture of the side wall of the turning piece; and the rotating rod and the screw rod are in limited shell, and the shell is connected with the lifting platform.
5. The core permeability measurement device of claim 1, wherein the high pressure resistant canister has a visible window in a side wall thereof.
6. The core permeability measuring apparatus of claim 3, wherein the laser reflecting surface has the same height as the outlet of the high pressure resistant pipe end.
7. The core permeability measurement device of claim 1, wherein the high pressure resistant pipe is scalable; the pressure range of the booster pump is between 0 and 50Mpa, and the precision is 10 Kpa.
8. The core permeability measurement device of claim 1, wherein a first valve is provided between the booster pump and the first cavity; a second valve is arranged between the liquid injection pump and the second cavity; and a third valve is arranged between the high-pressure resistant pipe and the second cavity.
9. The core permeability measurement device of claim 1, further comprising: a flow meter connected to the outlet end; a back pressure valve connected with the flowmeter; and the liquid collecting device is connected with the back pressure valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811200617.2A CN109115670B (en) | 2018-10-16 | 2018-10-16 | Pressure generating device and rock core permeability measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811200617.2A CN109115670B (en) | 2018-10-16 | 2018-10-16 | Pressure generating device and rock core permeability measuring device |
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| CN109115670B true CN109115670B (en) | 2020-05-08 |
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