CN203772691U - Ultra-low permeability core gas permeability testing device - Google Patents
Ultra-low permeability core gas permeability testing device Download PDFInfo
- Publication number
- CN203772691U CN203772691U CN201420006322.2U CN201420006322U CN203772691U CN 203772691 U CN203772691 U CN 203772691U CN 201420006322 U CN201420006322 U CN 201420006322U CN 203772691 U CN203772691 U CN 203772691U
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- core
- holding unit
- permeability
- core holding
- ultra
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- 230000035699 permeability Effects 0.000 title claims abstract description 40
- 238000012360 testing method Methods 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011435 rock Substances 0.000 claims description 20
- 230000035515 penetration Effects 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000011981 development test Methods 0.000 abstract 1
- 229910001873 dinitrogen Inorganic materials 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 241000270295 Serpentes Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model relates to the technical field of oil development test, and in particular relates to an ultra-low permeability core gas permeability testing device. The device comprises a nitrogen gas cylinder, a filter, a stabilizing pot, a pressure sensor, a core clamper and a flow meter sequentially, all of which are connected by pipelines, wherein the pressure sensor and the core clamper are arranged in parallel, and a pressure regulating valve is arranged on each pipeline. The test result precision of ultra-low permeability core gas permeability is relatively high and the error is smaller; the device is simple in structure, convenient to use and low in manufacture cost; the errors such as reduction of core permeability caused by unnecessary interferences, for example, a gas source blocks the core pore passage, are avoided.
Description
Technical field
The utility model relates to oil development experimental technique field, is specifically related to a kind of ultra-low penetration rock core gas permeability proving installation.
Background technology
In Reservoir Development, along with the day by day exhaustion of conventional medium to high permeable rate oil reservoir resource, increasing hyposmosis, ultra-low penetration oil reservoir drop into exploitation, more have this year fine and close hydrocarbon-bearing pool and shale gas reservoir to start to drop into oil-gas mining.The common feature of this class oil reservoir is that permeability is low, and development difficulty is large, and generally acknowledged concept is thought at present: permeability, in the oil reservoir of 50 millidarcies, is called low-permeability oil deposit; Permeability, lower than the oil reservoir of 1 millidarcy, is called extra-low permeability oil reservoirs; Permeability is called fine and close hydrocarbon-bearing pool lower than the hydrocarbon-bearing pool of 0.1 millidarcy; The permeability of shale gas reservoir is generally less than 0.05 millidarcy.In the time that permeability is less than 1 millidarcy, liquid (water or oil) in core flow very difficult, and due to the existence of starting pressure, measurement and the contrast of liquid being surveyed to permeability have caused very large difficulty, that is: the value of liquid survey permeability is not unique, relevant with the pressure gradient etc. of measuring, this nonuniqueness has caused the difficulty in drill core permeability rate contrast.Due to the interaction force of nitrogen and solid surface a little less than, therefore nitrogen perm-plug method is unique, is convenient to the qualitative and parameter comparison of core.
Because permeability is lower, in the time that the perm-plug method device with traditional is measured, the flow of gas is less, adds that the precision of suspended body flowmeter is also lower, has therefore caused the error of permeability value larger.
Utility model content
When the utility model is measured in order to solve the traditional perm-plug method device of current employing, the error of permeability value is larger, and problem that can not Measurement accuracy drill core permeability rate value, provides a kind of ultra-low penetration rock core gas permeability proving installation.
In order to reach above-mentioned utility model object, the utility model by the following technical solutions:
A kind of ultra-low penetration rock core gas permeability proving installation, comprise successively nitrogen cylinder, filtrator, steady-flow tank, pressure transducer, core holding unit and flowmeter, each several part is connected by pipeline, and wherein pressure transducer and core holding unit are arranged in parallel, and described pipeline is provided with pressure-regulating valve.This device both can have been measured the permeability of ultra-low penetration core simply, can well describe again under low pressure the seepage flow characteristics in ultra-low penetration core.
As preferably, described core holding unit is three, be respectively core holding unit to be measured, the first known core holding unit and the second known core holding unit, after core holding unit to be measured is connected with the first known core holding unit, then all in parallel with the second known core holding unit and pressure transducer, on three groups of branch roads in parallel, be provided with for testing the flowmeter of flow separately.
By two known with permeability rock core to be measured rock cores are first connected, and then in parallel, can avoid the error in test process, increase the precision of test result, thereby improve the quality detecting.
As preferably, after described steady-flow tank, also connect and be provided with force (forcing) pump.Force (forcing) pump is the pressure in modifier as required, thereby change the pressure differential at rock core two ends, tests by the permeability to rock core under different pressure, can eliminate deviation, reduces the impact that outer bound pair is tested, the precision of raising test result.
As preferably, the diameter of described pipeline is 1-1.5mm.
Compared with prior art, beneficial effect is the utility model: 1 test result precision is higher, and error is less; 2 apparatus structures are simple, easy to use, low cost of manufacture; 3 prevent that unnecessary interference from reducing the generation of equal error as thereby source of the gas poisonous snake rock core duct causes core permeability.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the present utility model.
In figure: 1 nitrogen cylinder, 2 filtrators, 3 steady-flow tanks, 4 pressure transducers, 5 core holding units, 51 core holding units to be measured, 52 first known core holding units, 53 second known core holding units, 6 flowmeters, 7 pressure-regulating valves, 8 force (forcing) pumps.
Embodiment
Below by specific embodiment, the technical solution of the utility model is further described to explanation.
Embodiment:
A kind of ultra-low penetration rock core gas permeability proving installation, as shown in Figure 1, comprise successively nitrogen cylinder 1, filtrator 2, steady-flow tank 3, pressure transducer 4, core holding unit 5 and flowmeter 6, after steady-flow tank 3, also series connection is provided with force (forcing) pump 8, pressure transducer 4 and core holding unit 5 are arranged in parallel, the pipeline that each several part is 1-1.5mm by diameter is connected, and on pipeline, is also provided with pressure-regulating valve 7.
In order to improve the precision of test result, core holding unit 5 is set to three, be respectively core holding unit 51 to be measured, the first known core holding unit 52 and the second known core holding unit 53, after core holding unit 51 to be measured is connected with the first known core holding unit 52, then all in parallel with the second known core holding unit 53 and pressure transducer 4, on three groups of branch roads in parallel, be provided with for testing the flowmeter 6 of flow separately.
In the time of test, first, open nitrogen, by clean air purge in pipeline, then, the rock core to be measured of permeability the unknown and the known known rock core of permeability are clamped in respectively on core holding unit 51 to be measured, the first known core holding unit 52 and the second known core holding unit 53, then gather respectively core holding unit to be measured 51 and the pressure at known core holding unit 52 two ends and the data of flowmeter before and after force (forcing) pump pressurization by adjusting force (forcing) pump; Gather the volume data of core holding unit 51 to be measured, the first known core holding unit 52 and the second known core holding unit 53, finally, carry out the permeability of technology rock core by pressure data and data on flows, by the known rock core of permeability, the permeability of rock core to be measured is revised, revised the final permeability of determining rock core to be measured by the data before and after force (forcing) pump 8 pressurizations.
Claims (4)
1. a ultra-low penetration rock core gas permeability proving installation, it is characterized in that, comprise successively nitrogen cylinder (1), filtrator (2), steady-flow tank (3), pressure transducer (4), core holding unit (5) and flowmeter (6), each several part is connected by pipeline, wherein pressure transducer (4) and core holding unit (5) are arranged in parallel, and described pipeline is provided with pressure-regulating valve (7).
2. a kind of ultra-low penetration rock core gas permeability proving installation according to claim 1, it is characterized in that, described core holding unit (5) is three, be respectively core holding unit to be measured (51), the first known core holding unit (52) and the second known core holding unit (53), after core holding unit to be measured (51) is connected with the first known core holding unit (52), then all in parallel with the second known core holding unit (53) and pressure transducer (4), on three groups of branch roads in parallel, be provided with for testing the flowmeter of flow (6) separately.
3. a kind of ultra-low penetration rock core gas permeability proving installation according to claim 1, is characterized in that, after described steady-flow tank (3), also series connection is provided with force (forcing) pump (8).
4. a kind of ultra-low penetration rock core gas permeability proving installation according to claim 1, is characterized in that, the diameter of described pipeline is 1-1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420006322.2U CN203772691U (en) | 2014-01-02 | 2014-01-02 | Ultra-low permeability core gas permeability testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420006322.2U CN203772691U (en) | 2014-01-02 | 2014-01-02 | Ultra-low permeability core gas permeability testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203772691U true CN203772691U (en) | 2014-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420006322.2U Expired - Fee Related CN203772691U (en) | 2014-01-02 | 2014-01-02 | Ultra-low permeability core gas permeability testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203772691U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994958A (en) * | 2014-01-02 | 2014-08-20 | 浙江海洋学院 | Measuring apparatus for gas permeability of ultra-low-permeability rock core and measuring method using measuring apparatus |
| CN113791015A (en) * | 2021-09-13 | 2021-12-14 | 重庆科技学院 | Starting pressure gradient testing device and method for polymer solution displacement thickened oil |
-
2014
- 2014-01-02 CN CN201420006322.2U patent/CN203772691U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994958A (en) * | 2014-01-02 | 2014-08-20 | 浙江海洋学院 | Measuring apparatus for gas permeability of ultra-low-permeability rock core and measuring method using measuring apparatus |
| CN113791015A (en) * | 2021-09-13 | 2021-12-14 | 重庆科技学院 | Starting pressure gradient testing device and method for polymer solution displacement thickened oil |
| CN113791015B (en) * | 2021-09-13 | 2023-08-22 | 重庆科技学院 | Starting pressure gradient testing device and method for polymer solution displacement thick oil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20150102 |
|
| EXPY | Termination of patent right or utility model |