CN215493033U - Rock permeability measuring device - Google Patents

Abstract

The utility model discloses a rock permeability measuring device, which relates to the technical field of measuring devices and comprises a fluid supply element, a testing cylinder, a first filling element and a first fluid receiving element, wherein the first filling element is made of flexible materials, the first filling element is arranged on the inner wall of the testing cylinder and can be deformed and used for clamping a rock sample after being filled with fluid, the first filling element is arranged around the outer side wall of the rock sample and completely covers the outer side wall of the rock sample, the fluid supply element can introduce the fluid into the testing cylinder, the first filling element is not in contact with the outer wall, perpendicular to the fluid moving direction, of the rock sample, the first fluid receiving element is communicated with one end, far away from the fluid supply element, of the testing cylinder, and the first fluid receiving element is used for collecting and measuring the flow of the fluid passing through the rock sample. The rock permeability measuring device can improve the accuracy of the rock permeability measuring result.

Description

Rock permeability measuring device

Technical Field

The utility model relates to the technical field of measuring devices, in particular to a rock permeability measuring device.

Background

A reservoir is a trap that collects a certain amount of oil and gas. In addition to the capacity of storing oil and gas, an oil and gas reservoir must also allow oil and gas to seep in rock under the action of pressure, which is a necessary condition for the development of the oil and gas reservoir.

Rock permeability refers to the ability of a rock to allow fluid to pass through at a certain pressure difference, and is a parameter that characterizes the ability of the rock itself to conduct gas or liquid, i.e., rock permeability is a measure of the amount of ability of a fluid to percolate through the rock.

The existing rock permeability measuring device usually clamps a rock sample through a clamp holder, and then realizes the measurement of the rock permeability by introducing fluid, but the existing clamp holder usually rigidly contacts with the rock sample, so that the surface structure of the rock is easily damaged in the clamping process, and the accuracy of the permeability measurement is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a rock permeability measuring device, which is used for solving the problems in the prior art and improving the accuracy of the rock permeability measuring result.

In order to achieve the purpose, the utility model provides the following scheme:

the utility model provides a rock permeability measuring device, which comprises a fluid supply element, a test cylinder body, a first filling element and a first fluid receiving element, the first filling element is made of flexible material, is arranged on the inner wall of the testing cylinder body and can be deformed and used for clamping a rock sample after being filled with fluid, the first filler element is arranged around and entirely covers the outer sidewall of the rock sample, the fluid supply element is capable of introducing fluid into the testing cylinder, the first filling element does not contact the outer wall of the rock sample perpendicular to the moving direction of the fluid, the first fluid receiving element communicates with an end of the test cartridge remote from the fluid supply element, and the first fluid receiving element is for collecting and measuring the flow of fluid through the rock sample.

Preferably, the syringe further comprises a contrast cylinder, a second filling element and a second fluid receiving element, wherein the second filling element is made of flexible material, the second filling element is arranged on the inner wall of the comparison cylinder body, can be deformed after being filled and is used for clamping a comparison sample with the same shape and size as the rock sample, the contrast sample being not permeable to fluid inside, said second filling element being arranged around the outer side wall of the contrast sample, the fluid supply element can feed the same fluid and the same amount of fluid as the fluid in the testing cylinder into the comparison cylinder, and the second filling member does not contact the outer wall of the comparative sample perpendicular to the direction of movement of the fluid, the second fluid receiving element communicates with an end of the contrast cylinder remote from the fluid supply element, and the second fluid receiving element is for collecting and measuring fluid passing through the gap between the contrast sample and the second packing element.

Preferably, the fluid supply element comprises a first fluid supply element and a second fluid supply element, the first fluid supply element is fixedly connected and communicated with one end of a first supply pipe, and the other end of the first supply pipe is fixedly connected and communicated with the test cylinder body; the second fluid supply element is fixedly connected and communicated with one end of a second supply pipe, and the other end of the second supply pipe is fixedly connected and communicated with the contrast cylinder.

Preferably, a first pressure gauge is fixed on the first supply pipe, and the first pressure gauge is used for detecting the pressure at the first supply pipe; and a second pressure gauge is fixed on the second supply pipe and used for detecting the pressure at the second supply pipe.

Preferably, the first fluid receiving element comprises a first receiving box, the first receiving box is communicated with the testing cylinder, the second fluid receiving element comprises a second receiving box, the second receiving box is communicated with the comparison cylinder, the first receiving box and the second receiving box are both made of transparent materials, scale marks are arranged on the side walls of the first receiving box and the second receiving box, and the scale marks are used for experimenters to observe the liquid level height in the first receiving box and the liquid level height in the second receiving box.

Preferably, the first fluid receiving element further comprises a third pressure gauge for detecting the pressure in the first receiving tank; the second fluid receiving element further comprises a fourth pressure gauge for detecting the pressure in the second receiving tank.

Preferably, the test cylinder is communicated with the first receiving box through a test pipe, and the comparison cylinder is communicated with the second receiving box through a comparison pipe.

Preferably, the device further comprises a controller, a first pressurizing element, a second pressurizing element, a first pressurizing pipe and a second pressurizing pipe, wherein one end of the first pressurizing pipe is fixedly connected and communicated with the first pressurizing element, and the other end of the first pressurizing pipe is fixedly connected and communicated with the first supply pipe and is used for pressurizing the inside of the first supply pipe; one end of the second pressurizing pipe is fixedly connected and communicated with the second pressurizing element, and the other end of the second pressurizing pipe is fixedly connected and communicated with the second supply pipe and used for pressurizing the inside of the second supply pipe; the first pressure gauge, the second pressure gauge, the first pressurizing element and the second pressurizing element are all electrically connected with the controller, the first pressure gauge can transmit a detected pressure value to the controller, and the controller controls the first pressurizing element to be opened or closed; the second pressure gauge can transmit the detected pressure value to the controller, and the controller controls the second pressurizing element to be opened or closed.

Preferably, a first filling pipe is fixed on the side wall of the testing cylinder, the first filling pipe is communicated with the first filling element and is used for introducing fillers into the first filling element, a fifth pressure gauge is further arranged on the first filling element and is used for detecting the pressure in the first filling element;

and a second filling pipe is fixed on the side wall of the comparison cylinder body, the second filling pipe is communicated with the second filling element and is used for introducing fillers into the second filling element, and a sixth pressure gauge is further arranged on the second filling element and is used for detecting the pressure in the second filling element.

Preferably, the first and second filler elements are both balloons.

Compared with the prior art, the utility model has the following technical effects:

the rock permeability measuring device provided by the utility model has the advantages that the first filling element is arranged on the inner wall of the testing cylinder body and can be deformed and used for clamping the rock sample after being filled with fluid, so that the rock sample can be clamped without damaging the outer wall structure of the rock sample, the accuracy of permeability testing is prevented from being influenced, the first filling element is arranged around the outer side wall of the rock sample and completely covers the outer side wall of the rock sample, the outer wall of the rock sample is blocked, the first filling element is made of flexible materials, the rock sample can be further adapted to the outer wall shape of the rock sample when being clamped, the first filling element is more tightly attached to the outer wall of the rock sample, a gap between the first filling element and the outer wall of the rock sample is reduced, fluid flowing out of the gap is reduced, the outer side wall of the rock sample is blocked by the first filling element, the first filling element is not contacted with the outer wall, which is vertical to the moving direction of the fluid, on the rock sample, thereby ensuring one-dimensional outflow of the fluid in the rock sample and ensuring the accuracy of the permeability determination, the first fluid receiving element being arranged to collect and measure fluid passing through the rock sample and thereby obtain the permeability of the rock.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a rock permeability measuring device provided by the present invention;

in the figure: 100-rock permeability measuring device, 1-fluid supply element, 11-first fluid supply element, 12-second fluid supply element, 2-test cylinder, 3-first packing element, 31-first packing tube, 32-fifth pressure gauge, 4-rock sample, 5-first fluid receiving element, 51-first receiving tank, 52-third pressure gauge, 53-test tube, 6-comparison cylinder, 7-second packing element, 71-second packing tube, 72-sixth pressure gauge, 8-comparison sample, 9-second fluid receiving element, 91-second receiving tank, 92-fourth pressure gauge, 93-comparison tube, 10-first supply tube, 20-second supply tube, 30-first pressure gauge, 40-a second pressure gauge, 50-a first pressure increasing element, 501-a first pressure increasing pipe, 60-a second pressure increasing element, 601-a second pressure increasing pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model aims to provide a rock permeability measuring device to solve the technical problem that the measuring result of the existing rock permeability measuring device is inaccurate.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in FIG. 1, the utility model provides a rock permeability measuring apparatus 100, which comprises a fluid supply element 1, a testing cylinder 2, a first filling element 3 and a first fluid receiving element 5, wherein the first filling element 3 is installed on the inner wall of the testing cylinder 2 and can be deformed and used for clamping a rock sample 4 after being filled with fluid, so that the rock sample 4 can be clamped without damaging the outer wall structure of the rock sample 4 and influencing the permeability test accuracy, the first filling element 3 is arranged around the outer wall of the rock sample 4 and completely covers the outer wall of the rock sample 4, so as to realize the sealing of the outer wall of the rock sample 4, and the first filling element 3 is made of a flexible material, so that the rock sample 4 can be adapted to the outer wall shape of the rock sample 4 when being clamped, and is more tightly attached to the outer wall of the rock sample 4, so as to reduce the gap between the first filling element 3 and the outer wall of the rock sample 4, reducing the fluid flowing out through the gap, plugging the outer side wall of the rock sample 4 through the first filling element 3, preventing the fluid from flowing out along the outer side wall of the rock sample 4, the fluid supply element 1 can introduce the fluid into the testing cylinder 2, the first filling element 3 is not in contact with the outer wall of the rock sample 4 perpendicular to the moving direction of the fluid, so as to ensure the one-dimensional flowing out of the fluid in the rock sample 4, and ensure the accuracy of permeability determination, the first fluid receiving element 5 is communicated with one end of the testing cylinder 2 far away from the fluid supply element 1, and the first fluid receiving element 5 is used for collecting and measuring the fluid passing through the rock sample 4, so as to obtain the permeability of the rock, preferably, the rock sample 4 is cut into a square, so that the length, namely the cross-sectional area of the rock sample can be conveniently measured, and the comparison sample 8 is made of a steel material.

Specifically, the rock permeability measuring device 100 provided by the utility model further comprises a comparison cylinder 6, a second filling element 7 and a second fluid receiving element 9, wherein the second filling element 7 is made of a flexible material, so that the clamping stability and the sealing performance on the outer side wall of the comparison sample 8 are improved, the second filling element 7 is arranged on the inner wall of the comparison cylinder 6 and is used for clamping the comparison sample 8 which is the same as the rock sample 4 in shape and size after being filled, the inside of the comparison sample 8 cannot allow fluid to pass through, so that the fluid can only flow through a gap between the outer side wall of the comparison sample 8 and the second filling element 7, the second filling element 7 is arranged around the outer side wall of the comparison sample 8, the pressure applied to the comparison sample 8 by the second filling element 7 is equal to the pressure applied to the outer wall of the rock sample 4 by the first filling element 3, the fluid supply element 1 can introduce the same amount of fluid as that in the testing cylinder 2 into the comparison cylinder 6, and the second filling member 7 does not contact the outer wall of the comparison sample 8 perpendicular to the direction of movement of the fluid, the second fluid receiving member 9 communicates with the end of the comparison cylinder 6 remote from the fluid supply member 1, and the second fluid receiving member 9 is used for collecting and measuring the fluid passing through the gap between the comparison sample 8 and the second filling member 7, by the above-mentioned structure, the comparison sample 8 and the rock sample 4 are in the same experimental environment to improve accuracy, the amount of fluid entering the first fluid receiving member 5 is the fluid permeating through the rock sample 4 plus the amount of fluid passing through the gap between the side wall of the rock sample 4 and the first filling member 3, the fluid entering the second fluid receiving member 9 only includes the amount of fluid flowing out through the gap between the comparison sample 8 and the second filling member 7, the total amount of fluid entering the first fluid receiving member 5 minus the total amount of fluid entering the second fluid receiving member 9, the amount of fluid permeated through the rock is calculated by combining the data such as the length, the cross section area and the like of the rock sample 4, and the determination result is high in accuracy.

The fluid supply element 1 comprises a first fluid supply element 11 and a second fluid supply element 12, the first fluid supply element 11 is connected and communicated with one end of a first supply pipe 10, and the other end of the first supply pipe 10 is fixedly connected and communicated with the test cylinder 2; the second fluid supply element 12 is fixedly connected and communicated with one end of a second supply pipe 20, and the other end of the second supply pipe 20 is fixedly connected and communicated with the comparison cylinder 6, so that the pressure of the front end of the test cylinder 2 is consistent with that of the front end of the comparison cylinder 6, the same test environment is provided, the accuracy of the test result is improved, and the front end is close to one end of the fluid supply element.

Be fixed with first manometer 30 on the first supply tube 10, first manometer 30 is used for detecting the pressure of first supply tube 10 department, and then realize the real time monitoring to the pressure of 2 front ends of test barrel, be fixed with second manometer 40 on the second supply tube 20, second manometer 40 is used for detecting the pressure of 20 departments of second supply tube, and then realize the real time monitoring to the pressure of 6 front ends of comparison barrel, both prevent that the pressure from too big emergence accident, can adjust front end pressure in real time according to the indicating value of first manometer 30 and second manometer 40 again, with the rock permeability under the measurement different pressures.

When the fluid supplied by the fluid supply member 1 is a liquid, the first fluid receiving member 5 includes a first receiving tank 51, the first receiving tank 51 is communicated with the testing cylinder 2 and is used for receiving the liquid flowing out through the testing cylinder 2, the second fluid receiving member 9 includes a second receiving tank 92, the second receiving tank 92 is communicated with the comparison cylinder 6 and is used for receiving the liquid flowing out through the comparison cylinder 6, the first receiving tank 51 and the second receiving tank 92 are made of transparent materials so as to observe the liquid level heights in the first receiving tank 51 and the second receiving tank 92, and the side walls of the first receiving tank 51 and the second receiving tank 92 are respectively provided with a scale mark, the scale marks are used for an experimenter to observe the liquid level height in the first receiving tank 51 and the liquid level height in the second receiving tank 92 so as to perform accurate reading, and further subtract the liquid level height in the second receiving tank 92 from the liquid level height in the first receiving tank 51, and calculating to obtain the accurate rock permeability by combining the size of the rock.

When the fluid is a liquid, the rock permeability measuring apparatus 100 according to the present invention further includes a controller, a first pressurizing element 50, a second pressurizing element 60, a first pressurizing pipe 501, and a second pressurizing pipe 601, wherein one end of the first pressurizing pipe 501 is fixedly connected to and communicated with the first pressurizing element 50, and the other end of the first pressurizing pipe 501 is fixedly connected to and communicated with the first supply pipe 10, and is configured to pressurize the interior of the first supply pipe 10; one end of the second pressure increasing pipe 601 is fixedly connected and communicated with the second pressure increasing element 60, the other end of the second pressure increasing pipe 601 is fixedly connected and communicated with the second supply pipe 20 and is used for increasing pressure in the second supply pipe 20, so as to respectively control the pressure in the first supply pipe 10 and the pressure in the second supply pipe 20, so as to ensure that the pressure in the first supply pipe 10 is consistent with the pressure in the second supply pipe 20, and ensure the normal operation of the comparison test, because the compressibility of liquid is small, the pressure increasing of the front ends of the test cylinder 2 and the comparison cylinder 6 is realized by the first pressure increasing element 50 and the second pressure increasing element 60, so as to reach the required pressure value, and further facilitate the test of the permeability of rocks under different pressure differences, the first pressure gauge 30, the second pressure gauge 40, the first pressure increasing element 50 and the second pressure increasing element 60 are all electrically connected with the controller, and the first pressure gauge 30 can transmit the detected pressure value to the controller, the controller controls the opening or closing of the first pressurizing element 50 and the second pressurizing element 60, so that the automatic control of the pressure is realized, and the control accuracy is high.

When the fluid supplied by the fluid supplying member 1 is gas, the first fluid receiving member 5 further comprises a third pressure gauge 52, the third pressure gauge 52 is used for detecting the pressure in the first receiving tank 51, and the gas quantity entering the first receiving tank 51 is obtained by comparing the readings of the third pressure gauge 52 before and after the fluid is supplied and combining the internal volume of the first receiving tank 51, wherein the gas quantity is the gas quantity permeated by the rock sample 4 and the gas quantity passing through the gap between the rock sample 4 and the first filling member 3; the second fluid receiving element 9 further comprises a fourth pressure gauge 92, the fourth pressure gauge 92 is used for detecting the pressure in the second receiving box 92, the gas quantity entering the second receiving box 92 is obtained by comparing the readings of the fourth pressure gauge 92 before and after the fluid is supplied and combining the volume in the second receiving box 92, the gas quantity is the gas quantity passing through the gap between the comparison sample 8 and the second filling element 7, the gas quantity entering the first receiving box 51 is subtracted by the gas quantity entering the second receiving box 92, namely the gas quantity permeating through the rock, and the rock permeability is obtained by combining the size of the rock.

The testing cylinder 2 is communicated with the first receiving box 51 through the testing pipe 53, and the comparison cylinder 6 is communicated with the second receiving box 92 through the comparison pipe 93, so that stable circulation of fluid is ensured.

A first filling pipe 31 is fixed on the side wall of the testing cylinder 2, the first filling pipe 31 is communicated with the first filling element 3 and is used for introducing fillers into the first filling element 3, a fifth pressure gauge 32 is also arranged on the first filling element 3, and the fifth pressure gauge 32 is used for detecting the pressure in the first filling element 3;

a second filling pipe 71 is fixed on the side wall of the comparison cylinder 6, the second filling pipe 71 is communicated with the second filling element 7 and is used for introducing fillers into the second filling element 7, a sixth pressure gauge 72 is further arranged on the second filling element 7, the sixth pressure gauge 72 is used for detecting the pressure in the second filling element 7, the pressure in the first filling element 3 and the pressure in the second filling element 7 are respectively detected in real time through the fifth pressure gauge 32 and the sixth pressure gauge 72, the overlarge pressure is prevented, the explosion of the first filling element 3 or the second filling element 7 is caused, the internal pressures of the first filling element 3 and the second filling element 7 are equal, and further the clamping force applied to the rock sample 4 and the comparison sample 8 is equal, so that the testing accuracy is improved.

The first and second packing members 3 and 7 are both air cells, and the interior thereof is filled with air, and the structure is simple and low in cost, but the first and second packing members 3 and 7 of the rock permeability measuring apparatus 100 according to the present invention may be filled with liquid as long as they can provide a stable clamping force and do not damage the structure of the rock sample 4 and the comparative sample 8.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.

Claims (10)

1. A rock permeability measuring device is characterized in that: the device comprises a fluid supply element, a testing cylinder, a first filling element and a first fluid receiving element, wherein the first filling element is made of flexible materials, the first filling element is installed on the inner wall of the testing cylinder and can be deformed after being filled with fluid and used for clamping a rock sample, the first filling element is arranged around the outer side wall of the rock sample and completely covers the outer side wall of the rock sample, the fluid supply element can feed fluid into the testing cylinder, the first filling element is not in contact with the outer wall, perpendicular to the fluid moving direction, of the rock sample, the first fluid receiving element is communicated with one end, far away from the fluid supply element, of the testing cylinder, and the first fluid receiving element is used for collecting and measuring the flow rate of the fluid passing through the rock sample.

2. The rock permeability measurement device of claim 1, wherein: also comprises a contrast cylinder body, a second filling element and a second fluid receiving element, wherein the second filling element is made of flexible material, the second filling element is arranged on the inner wall of the comparison cylinder body, can be deformed after being filled and is used for clamping a comparison sample with the same shape and size as the rock sample, the contrast sample being not permeable to fluid inside, said second filling element being arranged around the outer side wall of the contrast sample, the fluid supply element can feed the same fluid and the same amount of fluid as the fluid in the testing cylinder into the comparison cylinder, and the second filling member does not contact the outer wall of the comparative sample perpendicular to the direction of movement of the fluid, the second fluid receiving element communicates with an end of the contrast cylinder remote from the fluid supply element, and the second fluid receiving element is for collecting and measuring fluid passing through the gap between the contrast sample and the second packing element.

3. The rock permeability measurement device of claim 2, wherein: the fluid supply element comprises a first fluid supply element and a second fluid supply element, the first fluid supply element is fixedly connected and communicated with one end of a first supply pipe, and the other end of the first supply pipe is fixedly connected and communicated with the test cylinder; the second fluid supply element is fixedly connected and communicated with one end of a second supply pipe, and the other end of the second supply pipe is fixedly connected and communicated with the contrast cylinder.

4. The rock permeability measurement device of claim 3, wherein: a first pressure gauge is fixed on the first supply pipe and used for detecting the pressure at the first supply pipe; and a second pressure gauge is fixed on the second supply pipe and used for detecting the pressure at the second supply pipe.

5. The rock permeability measurement device of claim 4, wherein: first fluid receiving element includes first receiver tank, first receiver tank with test barrel intercommunication, second fluid receiving element includes the second receiver tank, the second receiver tank with contrast barrel intercommunication, first receiver tank with the second receiver tank is transparent material and makes, just first receiver tank with all be equipped with the scale mark on the lateral wall of second receiver tank, the scale mark is used for the experimenter to observe liquid level height in the first receiver tank with liquid level height in the second receiver tank.

6. The rock permeability measurement device of claim 5, wherein: the first fluid receiving element further comprises a third pressure gauge for detecting the pressure in the first receiving tank; the second fluid receiving element further comprises a fourth pressure gauge for detecting the pressure in the second receiving tank.

7. The rock permeability measurement device of claim 5, wherein: the test cylinder body is communicated with the first receiving box through a test pipe, and the comparison cylinder body is communicated with the second receiving box through a comparison pipe.

8. The rock permeability measurement device of claim 5, wherein: the device comprises a first supply pipe, a second supply pipe and a controller, wherein the first supply pipe is fixedly connected with the first pressure element; one end of the second pressurizing pipe is fixedly connected and communicated with the second pressurizing element, and the other end of the second pressurizing pipe is fixedly connected and communicated with the second supply pipe and used for pressurizing the inside of the second supply pipe; the first pressure gauge, the second pressure gauge, the first pressurizing element and the second pressurizing element are all electrically connected with the controller, the first pressure gauge can transmit a detected pressure value to the controller, and the controller controls the first pressurizing element to be opened or closed; the second pressure gauge can transmit the detected pressure value to the controller, and the controller controls the second pressurizing element to be opened or closed.

9. The rock permeability measurement device of claim 2, wherein: a first filling pipe is fixed on the side wall of the testing cylinder, the first filling pipe is communicated with the first filling element and is used for introducing fillers into the first filling element, and a fifth pressure gauge is further arranged on the first filling element and is used for detecting the pressure in the first filling element;

and a second filling pipe is fixed on the side wall of the comparison cylinder body, the second filling pipe is communicated with the second filling element and is used for introducing fillers into the second filling element, and a sixth pressure gauge is further arranged on the second filling element and is used for detecting the pressure in the second filling element.

10. The rock permeability measurement apparatus of claim 9, wherein: the first filling element and the second filling element are both balloons.

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