CN202066847U - Stress sensitivity analog testing device of loose sandstone reservoir and special core holding unit thereof - Google Patents
Stress sensitivity analog testing device of loose sandstone reservoir and special core holding unit thereof Download PDFInfo
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- CN202066847U CN202066847U CN2011200241531U CN201120024153U CN202066847U CN 202066847 U CN202066847 U CN 202066847U CN 2011200241531 U CN2011200241531 U CN 2011200241531U CN 201120024153 U CN201120024153 U CN 201120024153U CN 202066847 U CN202066847 U CN 202066847U
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Abstract
The utility model discloses a stress sensitivity analog testing device of a loose sandstone reservoir and a special core holding unit thereof. The core holding unit comprises a cylinder body, wherein a piston and a lower cover are arranged on the cylinder body, and both the piston and the lower cover are matched with the cylinder body in a sealing manner; an inlet for fluid flowing-in the cylinder body is arranged on the piston, and an outlet for fluid flowing-out of the cylinder body is arranged on the lower cover; and the stress sensitivity analog testing device comprises the core holding unit. The device can accurately measure the confining pressure supported by a core; the experimental result is more real and reliable; the stress sensitivity degree of the reservoir can be more accurately evaluated; and the device has important directive significance for a loose sandstone oil field.
Description
Technical field
The utility model relates to a kind of understressed sand reservoir stress sensitive simulating test device and special-purpose core holding unit thereof, belongs to the experimental simulation device in the developing of reservoirs.
Background technology
Before the hydrocarbon-bearing pool exploitation, hydrodynamic pressure, rock skeleton stress and overburden pressure are in equilibrium state, at this moment the factor of porosity of reservoir and permeability are original porosity and original permeability, after hydrocarbon-bearing pool drops into exploitation, resident fluid is by extraction, thereby reservoir pressure descends and causes that clean confined pressure and effective stress increase, and causes volume of voids and permeability to reduce, and this phenomenon is exactly the stress sensitivity of reservoir.Compare with fine and close oil reservoir; loose sand oil accumulation is because original porosity and permeability are big; the reservoir degree of consolidation is poor; the easier generation expansion/compacting distortion of reservoir in completion, recovery process; cause the stress infringement; therefore influence oil well productivity, the stress sensitivity of understressed sand reservoir is tested and seemed particularly important, the stress sensitive evaluation is the important evidence that reservoir protection conceptual design and oil gas well productivity are estimated.
Confined pressure system in the stress sensitive proving installation mainly is that pressing mode reaches the purpose that increases confined pressure by carrying out radially to the rubber sleeve that wraps up rock core at present, but because the elasticity of rubber sleeve itself is very big, and the understressed sand rock core is comparatively loose, cause the rock core confined pressure of test under this pressuring method can not truly reflect the confined pressure that rock reality is born, make the result of simulated experiment bigger error occur.Therefore, in stress sensitive when test,, contrived experiment device simulates real layer variations of physical parameters situation under different confined pressures on the spot better how reduces the error of testing as far as possible, becomes very crucial problem.
Summary of the invention
The purpose of this utility model is to have the big situation of test error at existing stress sensitive proving installation, a kind of understressed sand reservoir stress sensitive simulating test device and special-purpose core holding unit thereof are provided, are used to estimate the stress sensitive degree of rock core under different confined pressure states.
A kind of core holding unit that the utility model provides, it comprises cylindrical shell, and described cylindrical shell is provided with piston and lower cover, and described piston and lower cover and described cylindrical shell are and are sealed and matched; Described piston is provided with the inlet that flows into described cylindrical shell for fluid, and described covering down is provided with the outlet of flowing out described cylindrical shell for fluid.
Above-mentioned core holding unit, described cylindrical shell are cylindrical tube.
Above-mentioned core holding unit, described piston and lower cover all can be sealed and matched by O type circle and described cylindrical shell, prevent that fluid or gas are spilled over to outside the described cylindrical shell.
Above-mentioned core holding unit, described piston end face is provided with net, to guarantee that fluid can inject rock core equably.
Above-mentioned core holding unit, described net can be connected with described piston by the net pressure pad with described cylindrical shell.
Above-mentioned core holding unit, described cylindrical shell are provided with the fixedly fixing lower pressing cap of upper pressing cap and lower cover of piston, are used for fixing respectively described piston and lower cover.
The utility model provides a kind of understressed sand reservoir stress sensitive simulating test device, and described device comprises displacement source, displacement pump, intermediate receptacle, core holding unit, pressure Table II, constant pressure pump, liquid container and mass flowmeter; The outlet in described displacement source is connected with the inlet of described displacement pump, and described displacement delivery side of pump is connected with the inlet of at least one described intermediate receptacle by pipeline A; Described pipeline A is provided with tensimeter I; The outlet of described intermediate receptacle is connected with the inlet of described core holding unit by pipeline B; Described pipeline B is connected with described pressure Table II, constant pressure pump and liquid container successively; After linking to each other with described mass flowmeter, the outlet of described core holding unit communicates with atmosphere.
In the above-mentioned proving installation, described displacement delivery side of pump can be connected with the inlet of the intermediate receptacle of three parallel connections, and its effect provides stable certain fluid or gas, makes to guarantee that stable fluid (gas) enters described core holding unit in the test process.
In the above-mentioned proving installation, described displacement source is high-pressure air source or the Simulated Water (oil) that has regulator; Described tensimeter I can test the pressure of the inlet end of described core holding unit, and the displacement pressure that obtains described rock core two ends thus is poor.
In the above-mentioned proving installation, described constant pressure pump, liquid container and pressure Table II are formed confining pressure device, and main effect is to provide constant axial confined pressure to rock core.
In the above-mentioned proving installation, described intermediate receptacle can be cylindrical.
In the above-mentioned proving installation, be equipped with stop valve on described pipeline A and the pipeline B, scalable fluid or gas communication speed.
Can be full of the simulation formation sand in the core holding unit of understressed sand reservoir stress sensitive simulating test device of the present utility model, or directly put into the core sample of moulding, and apply measurements of the chest, waist and hips stress simulation oil reservoir effective stress situation; The displacement pump injects rock core with the fluid in the displacement source (gas) equably by intermediate receptacle; Measurement mechanism testing rock core pressure at two ends, flow through fluid (gas) flow of rock core, and change confined pressure as required, by calculating the stress sensitive parameter of core sample.Device of the present utility model can be measured the confined pressure that rock core bears exactly, and experimental result is more genuine and believable, can estimate the stress sensitive degree of reservoir more exactly, and the understressed sand Oilfield developing is had great importance.The utility model can also be used for the test of core permeability except that being used for the stress sensitive test.
Description of drawings
Fig. 1 is the structural representation of the reservoir stress sensitive simulating test device of the utility model embodiment 1.
Fig. 2 is the structural representation of the core holding unit of the utility model embodiment 1.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing, but the utility model is not limited to following examples.
The structural representation of reservoir stress sensitive simulating test device of the present utility model and core holding unit respectively as depicted in figs. 1 and 2, each mark is as follows among the figure: 1 displacement source, 2 displacement pumps, 3 tensimeter I, 4 stop valves, 5 intermediate receptacles, 6 pressure Table II, 7 constant pressure pumps, 8 liquid containers, 9 core holding units, 10 mass flowmeters, 11 collection vessel, 12 pistons, 13 inlets, 14 lower covers, 15O type circle, 16 nets, 17 cylindrical tubes, 18 outlets, 19 pipeline A, 20 pipeline B, 21 pistons are the fixing pressure cap of pressure cap, 22 lower covers fixedly.
Reservoir stress sensitive simulating test device of the present utility model comprises displacement source 1, displacement pump 2, intermediate receptacle 5, core holding unit 9, liquid container 8, constant pressure pump 7 and mass flowmeter 10, and the outlet in this displacement source 1 is connected by the inlet of pipeline with displacement pump 2; The outlet of displacement pump 2 is connected with the inlet of the cylindrical intermediate receptacle 5 of three parallel connections by pipeline A19, and the main road of pipeline A19 is provided with tensimeter I 3, respectively is provided with a stop valve 4 on the branch road of three parallel connections of pipeline A; The outlet of intermediate receptacle 5 is connected with the inlet 13 of core holding unit 9 by pipeline B20; The outlet 18 of core holding unit 9 back that links to each other with mass flowmeter 10 communicates with atmosphere and is opened on collection vessel 11, is used to receive the fluid that seepage flow goes out; Pipeline B20 is connected with pressure Table II 6, constant pressure pump 7 and liquid container 8 successively.
In the above-mentioned understressed sand reservoir stress sensitive simulating test device, displacement pump 2 can be connected with the intermediate receptacle 5 of a plurality of parallel connections; Piston 12 and lower cover 14 can also be sealed and matched by Glais ring and cylindrical shell 9.
When using above-mentioned simulating test device, displacement pump 2 is set at a constant displacement flow velocity, the gas in the displacement source 1 (liquid) is injected in the intermediate receptacle 5, and measure the pressure of gases (liquid) by tensimeter I 3; Then the inlet 13 of gas (liquid) by core holding unit 9 flow into core holding unit 9 inner chamber in, inject rock core equably by the net on the end face that is arranged at piston 12 16, gas (liquid) is by the 18 outflow core holding units 9 of the outlet in the lower cover 14 and by flowing into behind the mass metrology meter 10 in the collection vessel 11 then; In the process of test, at first by constant pressure pump 7 from liquid container 8 pumping liquid to the core holding unit 9 with the confined pressure of slow increase rock core, measure the size of confined pressure simultaneously with pressure Table II 6, obtain the pressure of the inlet end of core holding unit 9 thus, thereby calculate the injury of confined pressure change the rock core rerum natura; When confined pressure is increased to the maximum confined pressure value of setting, slowly reduce confined pressure again, and write down the pressure of the inlet end of core holding unit 9 under the different confined pressure situations simultaneously, when confined pressure progressively returned to initial confined pressure value, one group of complete experiment was finished.
Utilize device of the present utility model, can test under the different confined pressure states, the situation of change of core holding unit inlet end pressure calculates the stress sensitive degree of rock core thus, can provide fundamental basis for the formulation of loose sand oil accumulation development plan.
Claims (10)
1. core holding unit, it is characterized in that: it comprises cylindrical shell, and described cylindrical shell is provided with piston and lower cover, and described piston and lower cover and described cylindrical shell are and are sealed and matched; Described piston is provided with the inlet that flows into described cylindrical shell for fluid, and described covering down is provided with the outlet of flowing out described cylindrical shell for fluid.
2. core holding unit according to claim 1 is characterized in that: described cylindrical shell is a cylindrical tube.
3. core holding unit according to claim 1 and 2 is characterized in that: described piston and lower cover all are sealed and matched by O type circle and described cylindrical shell.
4. core holding unit according to claim 1 and 2 is characterized in that: described piston end face is provided with net.
5. core holding unit according to claim 4 is characterized in that: described net is connected with described piston by the net pressure pad with described cylindrical shell.
6. core holding unit according to claim 1 and 2 is characterized in that: described cylindrical shell is provided with the fixedly fixing pressure cap of pressure cap and lower cover of piston.
7. understressed sand reservoir stress sensitive simulating test device, it is characterized in that: described device comprises displacement source, displacement pump, intermediate receptacle, core holding unit, pressure Table II, constant pressure pump, liquid container and mass flowmeter; Described core holding unit is claim 1 or 2 described core holding units; The outlet in described displacement source is connected with the inlet of described displacement pump, and described displacement delivery side of pump is connected with the inlet of at least one described intermediate receptacle by pipeline A; Described pipeline A is provided with tensimeter I; The outlet of described intermediate receptacle is connected with the inlet of described core holding unit by pipeline B; Described pipeline B is connected with described pressure Table II, constant pressure pump and liquid container successively; After linking to each other with described mass flowmeter, the outlet of described core holding unit communicates with atmosphere.
8. proving installation according to claim 7 is characterized in that: described displacement delivery side of pump is connected with the inlet of the intermediate receptacle of three parallel connections.
9. according to claim 7 or 8 described proving installations, it is characterized in that: described intermediate receptacle is cylindrical.
10. according to claim 7 or 8 described proving installations, it is characterized in that: be equipped with stop valve on described pipeline A and the pipeline B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200241531U CN202066847U (en) | 2011-01-25 | 2011-01-25 | Stress sensitivity analog testing device of loose sandstone reservoir and special core holding unit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200241531U CN202066847U (en) | 2011-01-25 | 2011-01-25 | Stress sensitivity analog testing device of loose sandstone reservoir and special core holding unit thereof |
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| CN202066847U true CN202066847U (en) | 2011-12-07 |
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| CN2011200241531U Expired - Lifetime CN202066847U (en) | 2011-01-25 | 2011-01-25 | Stress sensitivity analog testing device of loose sandstone reservoir and special core holding unit thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434151A (en) * | 2011-12-19 | 2012-05-02 | 中国海洋石油总公司 | Bottom-water coning dynamic simulation experiment device in bottom-water oil reservoir development and simulation system |
| CN105067794A (en) * | 2015-07-24 | 2015-11-18 | 成都理工大学 | Method for testing water sensitivity, salt sensitivity and alkali sensitivity of shale reservoir stratum |
| CN106370524A (en) * | 2016-09-30 | 2017-02-01 | 东北石油大学 | Method for determining ultimate injection pressure of fluid channeling on second cement face along interlayer, and verification device |
| CN106840995A (en) * | 2016-12-20 | 2017-06-13 | 中国石油天然气股份有限公司 | Physical simulation device and method for measuring salt cavern gas storage residue void utilization rate |
| CN107420078A (en) * | 2017-09-06 | 2017-12-01 | 阳晓燕 | Rock stress sensitivity drives oil displacement efficiency to steam influences physical simulating method and device |
| CN109269901A (en) * | 2018-09-18 | 2019-01-25 | 中国石油大学(华东) | A kind of multiple dimensioned horizontal joint comprehensive regulation imitative experimental appliance of pressure-sensitive and method |
| CN110146680A (en) * | 2018-02-12 | 2019-08-20 | 中国石油天然气股份有限公司 | Reservoir sensitivity experimental device |
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2011
- 2011-01-25 CN CN2011200241531U patent/CN202066847U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434151A (en) * | 2011-12-19 | 2012-05-02 | 中国海洋石油总公司 | Bottom-water coning dynamic simulation experiment device in bottom-water oil reservoir development and simulation system |
| CN102434151B (en) * | 2011-12-19 | 2015-04-29 | 中国海洋石油总公司 | Bottom-water coning dynamic simulation experiment device in bottom-water oil reservoir development and simulation system |
| CN105067794A (en) * | 2015-07-24 | 2015-11-18 | 成都理工大学 | Method for testing water sensitivity, salt sensitivity and alkali sensitivity of shale reservoir stratum |
| CN106370524A (en) * | 2016-09-30 | 2017-02-01 | 东北石油大学 | Method for determining ultimate injection pressure of fluid channeling on second cement face along interlayer, and verification device |
| CN106370524B (en) * | 2016-09-30 | 2019-01-25 | 东北石油大学 | The method and verifying device of a kind of limit injection pressure of determination along interlayer the second cement plane channelling |
| CN106840995A (en) * | 2016-12-20 | 2017-06-13 | 中国石油天然气股份有限公司 | Physical simulation device and method for measuring salt cavern gas storage residue void utilization rate |
| CN106840995B (en) * | 2016-12-20 | 2023-05-26 | 中国石油天然气股份有限公司 | Physical simulation device and method for measuring salt cavern gas storage residue void utilization rate |
| CN107420078A (en) * | 2017-09-06 | 2017-12-01 | 阳晓燕 | Rock stress sensitivity drives oil displacement efficiency to steam influences physical simulating method and device |
| CN107420078B (en) * | 2017-09-06 | 2023-09-19 | 阳晓燕 | Physical simulation method and device for influence of rock stress sensitivity on steam flooding oil displacement efficiency |
| CN110146680A (en) * | 2018-02-12 | 2019-08-20 | 中国石油天然气股份有限公司 | Reservoir sensitivity experimental device |
| CN109269901A (en) * | 2018-09-18 | 2019-01-25 | 中国石油大学(华东) | A kind of multiple dimensioned horizontal joint comprehensive regulation imitative experimental appliance of pressure-sensitive and method |
| CN109269901B (en) * | 2018-09-18 | 2021-01-12 | 中国石油大学(华东) | Pressure-sensitive multi-scale horizontal seam comprehensive regulation and control simulation experiment device and method |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee after: China National Offshore Oil Corporation Patentee after: CNOOC Research Institute Patentee after: Southwest Petroleum University Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee before: China National Offshore Oil Corporation Patentee before: CNOOC Research Center Patentee before: Southwest Petroleum University |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Co-patentee after: Southwest Petroleum University Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation Co-patentee before: Southwest Petroleum University |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111207 |