CN212483266U - Rock porosity and specific surface testing device - Google Patents
Rock porosity and specific surface testing device Download PDFInfo
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- CN212483266U CN212483266U CN202020246002.XU CN202020246002U CN212483266U CN 212483266 U CN212483266 U CN 212483266U CN 202020246002 U CN202020246002 U CN 202020246002U CN 212483266 U CN212483266 U CN 212483266U
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- 239000011435 rock Substances 0.000 title claims abstract description 60
- 238000012360 testing method Methods 0.000 title claims abstract description 54
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 2
- 238000013522 software testing Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000011981 development test Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model discloses a rock porosity and specific surface testing device, which belongs to the technical field of oilfield development and testing, wherein a porosity testing system mainly comprises a gas bomb, a pipeline, a pressure gauge, various stop valves, a one-way valve, a differential pressure sensor, an upstream three-way valve, a downstream three-way valve, an upper gas chamber, a lower gas chamber, a rock core holder, a vacuum pump and the like which are connected through pipelines and is used for measuring the porosity of a rock core; the specific surface testing system consists of a porosity testing system, a stop valve, a pressure gauge, a flowmeter, a closed container and an open container, and the rock core specific surface testing system is used for testing the rock specific surface. The utility model provides a test device both can accomplish the test of rock core porosity alone, also can accomplish the test to the rock face simultaneously, has improved efficiency of software testing, has effectively reduced test error.
Description
Technical Field
The utility model belongs to the technical field of the oil field development test, concretely relates to rock porosity and specific surface testing arrangement.
Background
The rock porosity and rock specific surface play an important role in the oil field development operation process, and have important reference and guidance significance for oil exploitation. The porosity of the corresponding rock needs to be known when the rock face is measured, and in the existing testing technology, a laboratory instrument for testing the porosity and a testing device for testing the rock face are often needed. During the test operation, the specific surface value of the corresponding rock can be continuously tested only by knowing the porosity of the rock, the test efficiency is reduced due to the complexity of the operation, the repeated disassembly of the rock core brings great influence to the test result, the accuracy of the specific surface value is reduced, and great errors are generated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the utility model provides a rock porosity and specific surface testing arrangement, can need not dismantle the installation rock core repeatedly through this experimental apparatus, can accomplish the test to rock porosity and rock specific surface through the switching of corresponding stop valve and three-way valve and the work of vacuum pump, obtain corresponding experimental data. The utility model provides a testing arrangement both can accomplish the test of rock core porosity alone, also can accomplish the test to the rock face simultaneously.
The purpose of the utility model is realized through the following technical scheme:
a rock porosity and specific surface testing device comprises a gas storage bottle, a pipeline, a pressure gauge, a stop valve, an upstream (downstream) three-way valve, a one-way valve, an upper (lower) gas chamber, a rock core holder, a differential pressure sensor, a vacuum pump, a flow meter, a closed container, an open container and the like. According to the abstract attached drawings, the structure is as follows: the outlet of the gas storage cylinder is provided with a stop valve (hereinafter referred to as a first stop valve), the outlet end of the stop valve is provided with a pressure gauge (hereinafter referred to as a first pressure gauge) for monitoring the gas pressure at the outlet end, the front end of the first pressure gauge is provided with a stop valve (hereinafter referred to as a second stop valve), the front end of the stop valve is connected with a one-way valve through a pipeline, the front end of the one-way valve is provided with a lower gas chamber, the lower gas chamber is connected with the core holder through a pipeline and a stop valve (hereinafter referred to as a third stop valve), the upper end of the lower gas chamber is provided with an upstream three-way valve, the upper end of the upstream three-way valve is connected with the upper gas chamber, the upper gas chamber is connected with the differential pressure sensor through a pipeline and the downstream three-way valve with the other end of the core holder, a pipeline of the upstream three-, in the figure, the pressure sensor and the core holder are connected in parallel, one end of the downstream three-way valve is connected with the closed container through a pipeline and a stop valve (hereinafter referred to as a fourth stop valve), the closed container is provided with a high-sensitivity pressure gauge (hereinafter referred to as a third pressure gauge) for detecting the pressure in the glass container and a container exhaust stop valve, and the lower end of the closed container is connected into the open container through a pipeline, a stop valve (hereinafter referred to as a fifth stop valve) and the flowmeter. The test device is provided with a ring pressure adding pipeline and an evacuation pipeline, wherein the ring pressure pipeline is arranged between a first pressure gauge and a second stop valve and communicated with a ring pressure port of the core holder, a stop valve (hereinafter referred to as a sixth stop valve), a vacuum pressure gauge (hereinafter referred to as a fourth pressure gauge) and a ring pressure evacuation valve are arranged in the ring pressure pipeline, the evacuation pipeline is arranged between a downstream three-way valve and the fourth stop valve, and an evacuation stop valve, a pressure gauge (hereinafter referred to as a fifth pressure gauge) and a vacuum pump are arranged in the evacuation pipeline.
As option 1, the core porosity test system is composed of a lower gas chamber, a pressure gauge (called a sixth pressure gauge), a third stop valve, a core holder, a downstream three-way valve, and a pipeline branch and a branch stop valve (called a branch stop valve), wherein the sixth pressure gauge is directly arranged on the downstream gas chamber and used for monitoring gas pressure, and the branch stop valve can control gas to enter the right end of the core holder and permeate into the core.
Alternatively 2, the rock porosity and specific surface testing device is provided with a data acquisition and processing device.
As a further option 3 of option 2, the data acquisition processing device is coupled to a pressure gauge, differential pressure sensor, flow meter, etc. via data lines.
As an option 4, the rock porosity and specific surface testing device applies ring pressure to the core holder through a hand pump, namely, a ring pressure applying loop is not connected with the main pipeline but directly connected with the hand pump, and a ring pressure applying medium is liquid.
The upper and lower gas chambers described in this patent are for the purposes of the schematic representation provided in this patent only, and references to upstream and downstream are intended to refer to the left and right ends of the core holder in the schematic representation, without any other limiting meaning.
The utility model has the advantages that: the effect of rock core porosity and rock specific surface simultaneous test can be realized, need not to dismantle the installation rock core repeatedly and can once only accomplish the test of rock specific surface, effectively improves the accuracy of efficiency of software testing and test result.
Drawings
Fig. 1 is a schematic structural view of embodiment 1.
Fig. 2 is a schematic structural view of embodiment 2.
Fig. 3 is a schematic structural view of embodiment 3.
Fig. 4 is a schematic structural view of embodiment 4.
In the figure: 1. a gas cylinder; 2-1, a first stop valve; 2-2. a sixth stop valve; 2-3. a second stop valve; 2-4. a third stop valve; 2-5, ring pressure emptying valve; 2-6, evacuating the stop valve; 2-7, a fourth stop valve; 2-8, an exhaust stop valve; 2-9. a fifth stop valve; 2-10 branch cut-off valve; 3-1, a first pressure gauge; 3-2, a second pressure gauge; 3-3, a fourth pressure gauge; 3-4. a fifth pressure gauge; 3-5, a third pressure gauge; 3-6. a sixth pressure gauge; 4. a one-way valve; 5. a lower gas chamber; 6. an upstream three-way valve; an upper gas chamber; 8. a core holder; 9. a differential pressure sensor; 10. a downstream three-way valve; 11. a vacuum pump; 12. a closed container; a flow meter; 14. an open container; 15. a data acquisition system.
Detailed Description
The following non-limiting examples serve to illustrate the invention.
Example 1:
as shown in figure 1, the rock porosity and specific surface testing device comprises a gas storage cylinder 1 for storing gas media required by testing, a first stop valve 2-1 connected to the outlet end of the gas storage cylinder 1 for opening and closing gas, a first pressure gauge 3-1 installed on a main pipeline between the first stop valve 2-1 and a second stop valve 2-3 for monitoring the gas outlet pressure of the gas storage cylinder, a ring pressure pipeline for applying ring pressure to the rock core holder 8 is arranged between the first pressure gauge 3-1 and the second stop valve, a sixth stop valve 2-2 is arranged on the annular pressure pipeline, and when the display value of a fourth pressure gauge 3-3 close to the core holder 8 reaches a preset value and is kept stable, the sixth stop valve 2-2 can be closed (at the moment, the annular pressure emptying valve 2-5 is in a closed state) to keep the annular pressure value of the core holder 8; a second stop valve 2-3 is arranged between the lower gas chamber 5The device is provided with a one-way valve 4, the one-way valve 4 only allows gas to enter a lower gas chamber 5 in one way, the lower gas chamber 5 is communicated with a core holder 8 through a pipeline and a third stop valve 2-4, an upper gas chamber 7 is communicated with the lower gas chamber 5 through an upstream three-way valve, the upper gas chamber 7 is connected with a differential pressure sensor 9 through a pipeline, the other end of the differential pressure sensor 9 is connected with a downstream three-way valve 10 through a pipeline, the upstream three-way valve 6 is communicated with a pipeline (i.e. a section connected with the downstream three-way valve 10) at the other end of the differential pressure sensor 9 through a pipeline, the left end of the downstream three-way valve 10 is connected with a pipeline of the core holder 8, the right end of the downstream three-way valve is connected with a fourth stop valve 2-7 through a pipeline, the right end of the fourth stop valve 2-7 is connected into a closed container 12(, meanwhile, an exhaust stop valve 2-8 is arranged for discharging gas in the closed container, a liquid outflow pipeline is arranged at the lower end of the closed container 12 and extends into the open container, and a fifth stop valve 2-9 and a flowmeter 13 are arranged on the pipeline; a vacuum pipeline is arranged on a pipeline between the downstream three-way valve 10 and the fourth stop valve 2-7, a fifth pressure gauge 3-4, a vacuum stop valve 2-6 and a vacuum pump 11 are sequentially arranged on the vacuum pipeline, dotted line frames in the schematic diagram respectively represent an upper gas chamber area I and a lower gas chamber area II, the volumes of the area I and the area II are equal, and the volume is set to be V1。
Example 2:
as shown in fig. 2, this embodiment is substantially the same as embodiment 1, except that: the testing device is provided with an automatic data acquisition system 15.
Example 3:
as shown in fig. 3, this embodiment is substantially the same as embodiment 1, except that: and a sixth pressure gauge 3-6 for monitoring the pressure in the gas chamber is arranged on the lower gas chamber 6, and the lower gas chamber 6 is connected with a downstream three-way valve 10 through a pipeline-branch stop valve 2-10-pipeline.
Example 4:
as shown in fig. 4, this embodiment is substantially the same as embodiment 3, except that: the testing device is provided with an automatic data acquisition system 15.
Example 5:
this example is substantially the same as examples 1-4, except that: the rock porosity and specific surface testing device applies ring pressure to the rock core holder 8 through a hand-operated pump and the like.
Example 6:
the test of a rock porosity and specific surface test device as described in examples 1 and 2 was carried out using the following method:
(1) right the utility model discloses a device carries out the detection of return circuit gas seal. And opening other stop valves except the evacuation stop valve 2-6 and the fifth stop valve 2-9 and the three-way valve to check whether the gas leaks when passing through the pipeline.
(2) After ensuring that the loop has no air leakage, the air pump is pumped out. Closing an exhaust stop valve 2-8, a ring pressure emptying valve 2-5 and a second stop valve 2-3 in sequence to add ring pressure to the core holder through a ring pressure adding pipeline, closing a sixth stop valve 2-2 and a first stop valve 2-1 when the pressure display value of a fourth pressure gauge 3-3 reaches a required ring pressure value, evacuating a loop for a short time, closing a vacuum pump 11 when the reading value of the second pressure gauge 3-2 is close to zero, evacuating the core, screwing a knob 10-1 of a downstream three-way valve 10 to block a pipeline connected with a differential pressure sensor, closing a third stop valve 2-4 and a fourth stop valve 2-7, starting the vacuum pump 11 to evacuate the core, and closing an evacuation stop valve 2-6 when the value of the fourth pressure gauge 3-4 is stable.
(3) And (4) measuring the porosity of the rock core. After the evacuation is finished, firstly, the knob 10-2 of the downstream three-way valve 10 is screwed, the knob 10-1 is loosened, the knob 6-2 of the upstream three-way valve 6 is screwed, the first stop valve 2-1 and the second stop valve 2-3 are opened, the lower gas chamber 5 and the upper gas chamber 7 are filled with the detection gas, and when the numerical value displayed on the differential pressure sensor is stable, the numerical value is P1(this value is not taken as a calculation value), the first stop valve 2-1 and the second stop valve 2-3 are closed, the knob 6-1 of the upstream three-way valve 6 is screwed, the two gas chamber zones are blocked and separated, and the common knowledge shows that the gas pressure is still P after the two zone blocks are separated1(ii) a Then, the third stop valve 2-4, the knob 6-2 of the upstream three-way valve 6 and the knob 10-1 of the downstream three-way valve 10 are opened and the pressure difference sensor is ready to displayThe value is recorded as P after the reading value is stable2The pressure value on the second pressure gauge 3-2 is P3The volume of the pipeline except the zone I and the zone II in the porosity testing system is V2Then, the porosity of the measured core can be obtained according to the gas porosity principle:
in the formula: vp＝(P2/P3)V1-V2
Wherein: vpThe pore volume of the core is shown; p2Is a differential pressure sensor reading; p3A second pressure gauge reading; v1Is the volume of region II; v2The pipeline volumes of the porosity test system except for zone I and zone II are shown.
(4) And measuring the rock specific surface. After the porosity of the core is measured, loosening the knobs 6-1, 6-2 and 10-2, opening the evacuation stop valve 2-6, starting a vacuum pump to pump gas out of the loop until the value indicated by the second pressure gauge 3-2 is zero or close to zero, stopping the vacuum pump, screwing the knobs 6-1, 6-2 and 10-1, and closing the evacuation stop valve 2-6; opening a first stop valve 2-1, a second stop valve 2-3, a fourth stop valve 2-7 and a fifth stop valve 2-9, allowing gas to enter the rock core from the left end of the rock core for displacement, observing the liquid outflow condition of the liquid outlet pipeline and the stable indication value of the flowmeter, and reading a reading P of a third pressure gauge 3-5 when the liquid stably and continuously flows out00And reading Q of the flow meter 131And obtaining a specific surface value according to the measured core porosity and known required parameters:
in the formula: sb1-rock face to face;
a, the cross section area of the core;
l is the core length;
h-core two-end pressure difference, calculation formula
P0Is the pressure in the chamber;
Q1-air flow through the core;
μ -air viscosity.
Above rock core porosity value and rock ratio face value also can pass through the utility model discloses in data acquisition system 15 obtain through data processing.
Example 7:
the test using method of the rock porosity and specific surface test device as described in examples 3 and 4 is carried out according to the following steps:
(1) right the utility model discloses a device carries out the detection of return circuit gas seal. The other shut-off valves except the evacuation shut-off valves 2 to 6 and the fifth shut-off valves 2 to 9 and the downstream three-way valve 10 are opened to check whether there is a gas leakage phenomenon while the gas passes through the pipeline.
(2) After ensuring that the loop has no air leakage, the air pump is pumped out. Closing an exhaust stop valve 2-8, a ring pressure emptying valve 2-5 and a second stop valve 2-3 in sequence to add ring pressure to the core holder through a ring pressure adding pipeline, closing a sixth stop valve 2-2 and a first stop valve 2-1 when the pressure display value of a fourth pressure gauge 3-3 reaches a required ring pressure value, evacuating a loop for a short time, and closing a vacuum pump 11 when the index of the sixth pressure gauge 3-6 is close to zero; and then vacuumizing the rock core, screwing a knob 10-1 of a downstream three-way valve 10, closing a third stop valve 2-4 and a fourth stop valve 2-7, starting a vacuum pump 11, vacuumizing the rock core, and closing the vacuum pump 11 and a vacuumizing stop valve 2-6 when the numerical value of a fourth pressure gauge 3-4 stably reaches a certain vacuum value.
(3) And (4) measuring the porosity of the rock core. After the evacuation is completed, the knob 10-2 of the downstream three-way valve 10 is first screwed, the branch cut-off valves 2-10 are closed, the knob 10-1 is loosened, the first cut-off valve 2-1 and the second cut-off valve 2-3 are opened, and the gas chamber 5 is loweredFilling detection gas, and recording a first pressure value P when the value of the sixth pressure gauge is stable3And closing the first stop valve 2-1 and the second stop valve 2-3; then, opening the third stop valve 2-4 and the sixth stop valve 2-10, and recording a second pressure value P when the numerical value of the sixth pressure gauge is stable4In examples 3 and 4, the volume of the region II is V1The pipeline volume of the porosity test system except the area II is V3Then, the porosity of the measured core can be obtained according to the gas porosity principle:
in the formula:
wherein: vpThe pore volume of the core is shown; p3To record a first pressure value; p4Recording a second pressure value; v1Is the volume of region II; v3The line volume of the porosity test system excluding zone ii.
(4) And measuring the rock specific surface. After the porosity of the core is measured, loosening the knob 10-2, opening the evacuation stop valve 2-6, starting a vacuum pump to pump gas out of the loop until the indication value of a sixth pressure gauge 3-6 is zero or close to zero, stopping the vacuum pump, screwing the knob 10-1 and closing the branch stop valve 2-10, and closing the evacuation stop valve 2-6; opening a first stop valve 2-1, a second stop valve 2-3, a fourth stop valve 2-7 and a fifth stop valve 2-9, allowing gas to enter the rock core from the left end of the rock core for displacement, observing the liquid outflow condition of the liquid outlet pipeline and the stable indication value of the flowmeter, and reading a reading P of a third pressure gauge 3-5 when the liquid stably and continuously flows out01And reading Q of the flow meter 132And obtaining a specific surface value according to the measured core porosity and known required parameters:
in the formula: sb1-rock face to face;
a, the cross section area of the core;
l is the core length;
h-core two-end pressure difference, calculation formula
P0Is the pressure in the chamber;
Q2-air flow through the core;
μ -air viscosity.
Above rock core porosity value and rock ratio face value also can pass through the utility model discloses in data acquisition system 15 obtain through data processing.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A rock porosity and specific surface testing device is characterized in that: comprises that
The porosity testing system comprises a gas storage bottle (1), a first stop valve (2-1), a sixth stop valve (2-2), a second stop valve (2-3), a third stop valve (2-4), an annular pressure emptying valve (2-5), an evacuation stop valve (2-6), a first pressure gauge (3-1), a second pressure gauge (3-2), a fourth pressure gauge (3-3), a fifth pressure gauge (3-4), a one-way valve (4), a lower gas chamber (5), an upstream three-way valve (6), an upper gas chamber (7), a rock core holder (8), a differential pressure sensor (9), a downstream three-way valve (10) and a vacuum pump (11), wherein the upper part of the gas storage bottle (1) is connected with the first stop valve (2-1), the first pressure gauge (3-1), The vacuum pump comprises a second stop valve (2-3), a one-way valve (4), a lower gas chamber (5) and a downstream three-way valve (10), wherein the second stop valve (2-3), the one-way valve (4), the lower gas chamber (5) and the downstream three-way valve (10) are sequentially connected through pipelines, the upper part of the lower gas chamber (5) is sequentially connected with an upstream three-way valve (6) and an upper gas chamber (7) through pipelines, the right end of the upstream three-way valve (6) is connected with a second pressure gauge (3-2) and the downstream three-way valve (10) through pipelines, the upper gas chamber (7) is connected with a differential pressure sensor (9) and the downstream three-way valve (10) through pipelines, and; the sixth stop valve (2-2), the fourth pressure gauge (3-3) and the annular pressure emptying valve (2-5) form an annular pressure adding pipeline, one end of the annular pressure adding pipeline is arranged between the first pressure gauge (3-1) and the second stop valve (2-3), the other end of the annular pressure adding pipeline is connected with the core holder (8), the vacuum pump (11), the evacuation stop valve (2-6) and the fifth pressure gauge (3-4) form an evacuation pipeline, and the evacuation pipeline is used for pumping residual gas in all pipelines and evacuating the core;
the specific surface testing system consists of a fourth stop valve (2-7), an exhaust stop valve (2-8), a fifth stop valve (2-9), a third pressure gauge (3-5), a closed container (12), a flowmeter (13) and an open container (14), one end of the fourth stop valve (2-7) is connected with a downstream three-way valve (10) in the porosity testing system, the other end is communicated with the upper part of the closed container (12), the upper part of the closed container (12) is provided with an exhaust stop valve (2-8) and a third pressure gauge (3-5), the lower part is connected with the fifth stop valve (2-9) and a flow meter (13) through pipelines, the lower end of the flow meter (13) is provided with a pipeline which extends into an open container (14), the closed container (12) and the open container (14) are filled with liquid.
2. The rock porosity and specific surface testing device of claim 1, wherein: the ring pressure pipeline is directly connected with the hand pump for ring pressure.
3. The rock porosity and specific surface testing device of claim 1, wherein: the testing device is provided with a data acquisition system (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020246002.XU CN212483266U (en) | 2020-03-03 | 2020-03-03 | Rock porosity and specific surface testing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020246002.XU CN212483266U (en) | 2020-03-03 | 2020-03-03 | Rock porosity and specific surface testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047105A (en) * | 2021-11-15 | 2022-02-15 | 东北石油大学 | Device and method for testing porosity of high-pressure helium shale |
-
2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047105A (en) * | 2021-11-15 | 2022-02-15 | 东北石油大学 | Device and method for testing porosity of high-pressure helium shale |
| CN114047105B (en) * | 2021-11-15 | 2022-11-15 | 东北石油大学 | Device and method for testing porosity of high-pressure helium shale |
| US20230152200A1 (en) * | 2021-11-15 | 2023-05-18 | Northeast Petroleum University | High-Pressure Helium Shale Porosity Testing Device and Method |
| US11733145B2 (en) * | 2021-11-15 | 2023-08-22 | Northeast Petroleum University | High-pressure helium shale porosity testing device and method |
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