CN102798507B - Testing device and testing method for tightness of underground salt cavern gas storage - Google Patents
Testing device and testing method for tightness of underground salt cavern gas storage Download PDFInfo
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- CN102798507B CN102798507B CN201210232963.5A CN201210232963A CN102798507B CN 102798507 B CN102798507 B CN 102798507B CN 201210232963 A CN201210232963 A CN 201210232963A CN 102798507 B CN102798507 B CN 102798507B
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Abstract
The invention belongs to the field of the development of oil gas resources, and particularly relates to a testing device and a testing method for the tightness of an underground salt cavern gas storage. The testing device comprises a container, a bracket and flexible pipe, wherein an external convex connector is arranged at the bottom of the container and is provided with a flow control valve. The container is positioned on a bracket tray, and the convex connector at the bottom of the container passes through a through hole in the tray; and the flow control valve is installed on the convex connector. Scale lines are arranged on the container and are used for measuring the change of the liquid level; and the external convex connector is connected with a first control valve of the underground salt cavern gas storage by the flexible pipe, so that the pressure change of brine in an injection-production tubular column can be detected. The bracket is provided with three legs which are distributed uniformly and can independently contract. The implementation method comprises the steps of: injecting the brine; mounting a sealing cover, the control valve and a pressure gage; mounting the bracket and the container; and measuring the tightness. The testing device provided by the invention has the advantages that the construction is simple, the implementation steps are concise, and the field operation is easily realized.
Description
Technical field
The invention belongs to petrol resources exploitation field, particularly, relate to a kind of gas storage cavern tightness measuring device and implementation step.
Background technology
The sealing of salt hole air reserved storeroom is one of important indicator weighing salt hole air reserved storeroom use safety.At present salt hole air reserved storeroom method for conducting leak test is mainly contained to API laws for criterion, Geostock method and patent publication No. are CN100514018A, denomination of invention is: the method in salt hole air reserved storeroom sealing pressure-measuring method, by analyze and onsite application finds that above method mainly exists following shortcoming:
(1), API method shortcoming: gas injection rate is large, need special interface level measurement instrument, and evaluation result is inaccurate, and reliability is poor.
(2), Geostock method shortcoming: the test duration is long, and cost is high; Testing tool requirement is high, site operative is poor.
(3), patent publication No. is method disclosed in the document of CN100514018A: operating process is loaded down with trivial details, cost is high, requires higher during onsite application to workman's technical merit.
In sum, all there is the place that can improve in above three kinds of methods, better could meet needs of production at salt hole air reserved storeroom method for testing tightness.
Summary of the invention
For overcoming the defect of prior art, the object of the present invention is to provide a kind of gas storage cavern tightness measuring device and method of testing, to solve the difficult problem existed in salt hole air reserved storeroom performing leak test.
Technical scheme of the present invention is as follows:
A kind of gas storage cavern tightness measuring device, comprising: container, support, flexible pipe, container bottom is provided with evagination interface; It is characterized in that: container is provided with scale mark, protrude interface and be connected with the first operation valve of gas storage cavern by flexible pipe, detect the sealing of salt cave and injection-production column jacket.
Preferably, container is positioned on bracket tray, and container bottom protrudes interface by pallet runs through circular hole; Protrude on interface and flowrate control valve is installed.
Preferably, container is the cylinder that transparent material makes, and be highly that 2m, overall diameter are 25cm, interior diameter is 20cm, measuring accuracy is 1cm.
Preferably, container upper end have one can the top cover of folding, with air hole on top cover, keep container inner pressure identical with atmospheric pressure.
Preferably, support has pallet, pallet is made for circular, metal, and diameter is 30cm, thickness is 1cm, and tray center position has diameter to be the circular hole that runs through of 5cm; There is railing in direction to pallet height, and railing is connected with tray edge, and rail height is 50cm.
Preferably, support has three legs, is uniformly distributed; Every bar leg all has independent telescope, can be regulated by the bolt on leg to leg progress row; Be cone-shaped bottom rack leg, maximumly can insert 20cm under earth's surface.
Preferably, support minimum constructive height is 0.8m, and the maximum length that rack leg can shrink is 30cm.
A kind of gas storage cavern method for testing tightness, is characterized in that comprising the following steps:
(1), make after chamber completes at salt hole air reserved storeroom, in salt cave, inject bittern by injection-production column jacket, until pithead position; Bittern is injected to pithead position in the annular space of injection-production column jacket and completion tubular column; Leave standstill 24 hours;
(2), at injection-production column jacket pithead position the first operation valve, the second operation valve and the first tensimeter are installed, and retentive control valve is in cut out; First operation valve is for controlling the connectedness between container and salt cave, and the second operation valve and the first tensimeter are used for bittern pressure change in monitor and forecast injection-production column jacket and salt cave; In the annular space well head position of injection-production column jacket and completion tubular column, the 3rd operation valve and the second tensimeter are installed, for bittern pressure change in monitor and forecast annular space;
(3), by stentplacement on ground, pithead position place, pallet and ground level level is made by adjustment leg is long; Container is placed on bracket tray, makes container bottom protrude interface by bracket tray runs through circular hole, by pipe fitting, container bottom is protruded interface and be connected with the first operation valve; Bittern is injected to container height 4/5 position in container;
(4), flowrate control valve, the first operation valve is opened, connection container and salt cave; Monitoring level change, and record level change data.
Preferably, the test duration is no less than 24 hours, every 0.5 hour record liquid level.
Preferably, bittern is saturated brine; Bittern can be discharged by operation valve, to ensure the safety of proving installation when showing data in tensimeter and being larger; In test process, support and container and ground level keeping parallelism.
The present invention is applicable to many interlayers salt hole air reserved storeroom and salt dome type salt hole air reserved storeroom; Proving installation simple structure, cheap, reliability is high; Concrete implementation step is succinct, be easy to execute-in-place, require low to workman's technical merit, is conducive to on-the-spotly promoting and using.
Accompanying drawing explanation
Fig. 1 is a kind of gas storage cavern tightness measuring device schematic diagram;
Fig. 2 is structure of container schematic diagram;
Fig. 3 is supporting structure schematic diagram;
Fig. 4 is that a kind of gas storage cavern tightness measuring device specifically implements schematic diagram;
In figure: 1, ground, 2, cement mantle, 3, completion tubular column, 4, annular space, 5, injection-production column jacket, 6, packer, 7, slips, 8, salt cave, 90, top cover, 91, bittern, 92, container, 93, support, 94, railing, 95, pallet, 96, rack leg, 97, bolt, 98, air hole, 99, protrude interface, 910, flow control valve, 911, flexible pipe, the 101, first operation valve, 102, the first gland bonnet, 103, the second tensimeter, the 104, the 3rd operation valve, the 105, first tensimeter, 106, the second operation valve, the 107, second gland bonnet.
Embodiment
As shown in Figures 1 to 4, a kind of gas storage cavern tightness measuring device, comprising: container 92, support 93, flexible pipe 911, container bottom is provided with evagination interface 99.Evagination interface is connected with first operation valve 101 in salt cave 8 by flexible pipe, detects the bittern pressure change in injection-production column jacket 5.Container is placed on the pallet 95 above support 93, protrudes interface and passes through from the middle circular hole of pallet.
As shown in Figure 2, container bottom protrudes on interface and is provided with flow control valve 910, for controlling flow; Container top have one can the top cover 90 of folding, top cover has air hole 98 for keeping container inner pressure identical with atmospheric pressure; Flexible pipe is connected with the protrusion interface of container bottom; Bittern 90 is filled in container; Container is the cylinder that transparent material makes, and container height is 2m, overall diameter is 25cm, interior diameter is 20cm, and measuring accuracy is 1cm.
As shown in Figure 3, support has three rack legs 96, is uniformly distributed, and every bar rack leg is provided with the length that bolt 97 independently can adjust every bar rack leg; Be cone-shaped bottom rack leg, maximumly can insert 20cm under earth's surface; Support minimum constructive height is 0.8m, and the maximum length that rack leg can shrink is 30cm.Support is provided with pallet 95, pallet is made for circular, metal, and diameter is 30cm, and thickness is 1cm, and tray center position has diameter to be the circular hole that runs through of 5cm; Pallet height direction has railing 94, railing is connected with tray edge, and rail height is 50cm.
As shown in Figure 4, the first gland bonnet 102 is arranged on injection-production column jacket 5 pithead position place, seals whole injection-production column jacket; Second gland bonnet 107 is arranged on the pithead position place of annular space between injection-production column jacket and completion tubular column 3, seals whole annular space 4.First operation valve 101 is arranged on the first gland bonnet, for controlling the connectedness in container and salt cave; Second operation valve 106 and the first tensimeter 105 are also arranged on the first gland bonnet, for monitoring bittern pressure change in injection-production column jacket; When bittern pressure is higher, closes the first operation valve, open the second operation valve, release bittern, guarantees equipment safety.3rd operation valve 104 and the second tensimeter 103 are arranged on the second gland bonnet, and for monitoring bittern pressure change in annular space between completion tubular column and injection-production column jacket, open the 3rd operation valve when bittern pressure is higher, release bittern, guarantees equipment safety.
Completion tubular column to be deep into from ground 1 salt cave 8 and to be connected with top, salt cave, and completion tubular column external diameter is 244.5mm, wall thickness 10.03mm, grade of steel N80, threaded connector are inclined trapezoid buckle; Completion tubular column adopts G level oil well cement, silica sand makes grout together with formation cementation with external additive, cement mantle 2 average thickness 3cm; Injection-production column jacket external diameter is 177.8mm, wall thickness is 9.19mm, grade of steel is N80, threaded connector is inclined trapezoid buckle, be positioned at completion tubular column and with completion tubular column dead in line, bottom completion tubular column, adopt salt hole air reserved storeroom Special packer 6 and slips 7 to link together.
Gas storage cavern performing leak test implementation process shown in Fig. 1 to Fig. 4 is as follows:
(1), make after chamber completes at salt hole air reserved storeroom, to salt cave, inject saturated bittern, until pithead position from injection-production column jacket; In bittern injection process, inject bittern in strict accordance with making the injection rate designed in the process of chamber; Meanwhile, in completion tubular column and injection-production column jacket annular space, inject bittern, until pithead position place; Leave standstill 24 hours.
(2), after bittern injected, at injection-production column jacket pithead position, the first gland bonnet has been installed at place, is sealed up by whole injection-production column jacket; First gland bonnet is provided with the second operation valve and the first tensimeter, for bittern pressure change in monitor and forecast injection-production column jacket; Meanwhile, the first gland bonnet is also provided with the first operation valve, for controlling the annular space between container and salt cave, the first operation valve keeps closed condition; In the annular space well head position of injection-production column jacket and completion tubular column, the 3rd operation valve and the second tensimeter are installed, for bittern pressure change in monitor and forecast annular space.
(3), by stentplacement on the ground at pithead position place, container is placed on the pallet of support, and container bottom is protruded interface through tray center circular hole; Container bottom is protruded interface and is connected with the first operation valve by the flexible pipe adopting pvc material to make, and ensures to be connected firmly, reliably, to close flow control valve; Saturated bittern is injected to scale 1.8m position in container; Long by bolt adjusting pole leg, keep pallet in whole test process, container and ground level level.
(4), flow control valve, the first operation valve is opened, connection container and salt cave; Every 30 minutes records level change position, continuously record 36 hours.
In whole test process, in injection-production column jacket and annular space, bittern pressure is all the time within the scope of equipment allowable stress, does not open second, third operation valve release bittern.
Through the test of 36 hours, in container, liquid level dropped to 0.95m from 1.8m, and liquid level reduces highly for 0.85m is less than 1m, therefore thinks that this salt hole air reserved storeroom sealing meets design requirement.
Claims (3)
1. a gas storage cavern method for testing tightness, adopt gas storage cavern tightness measuring device, the gas storage cavern tightness measuring device adopted, comprise: container, support, flexible pipe, support there is pallet, tray center position has runs through circular hole, and container bottom is provided with protrusion interface; Container is provided with scale mark, protrudes interface and is connected with the first operation valve of gas storage cavern by flexible pipe, detect the sealing of salt cave and injection-production column jacket; Support has three legs, and every bar leg all has independent telescope, can regulate leg progress row; It is characterized in that, comprise the following steps:
(1), make after chamber completes at salt hole air reserved storeroom, in salt cave, inject bittern by injection-production column jacket, until pithead position; Bittern is injected to pithead position in the annular space of injection-production column jacket and completion tubular column; Leave standstill 24 hours;
(2), at injection-production column jacket pithead position the first operation valve, the second operation valve and the first tensimeter are installed, and retentive control valve is in cut out; First operation valve is for controlling the connectedness between container and salt cave, and the second operation valve and the first tensimeter are used for bittern pressure change in monitor and forecast injection-production column jacket and salt cave; In the annular space well head position of injection-production column jacket and completion tubular column, the 3rd operation valve and the second tensimeter are installed, for bittern pressure change in monitor and forecast annular space;
(3), by stentplacement on ground, pithead position place, pallet and ground level level is made by adjustment leg is long; Container is placed on pallet, makes container bottom protrude interface by pallet runs through circular hole, by flexible pipe, container bottom is protruded interface and be connected with the first operation valve; Bittern is injected to container height 4/5 position in container;
(4), flowrate control valve, the first operation valve is opened, connection container and salt cave; Monitoring level change, and record level change data.
2. gas storage cavern method for testing tightness according to claim 1, is characterized in that: the test duration is no less than 24 hours, every 0.5 hour record liquid level.
3. gas storage cavern method for testing tightness according to claim 1 and 2, is characterized in that: bittern is saturated brine; In test process, support and container and ground level keeping parallelism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210232963.5A CN102798507B (en) | 2012-07-06 | 2012-07-06 | Testing device and testing method for tightness of underground salt cavern gas storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210232963.5A CN102798507B (en) | 2012-07-06 | 2012-07-06 | Testing device and testing method for tightness of underground salt cavern gas storage |
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| Publication Number | Publication Date |
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| CN102798507A CN102798507A (en) | 2012-11-28 |
| CN102798507B true CN102798507B (en) | 2015-05-13 |
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| CN201210232963.5A Expired - Fee Related CN102798507B (en) | 2012-07-06 | 2012-07-06 | Testing device and testing method for tightness of underground salt cavern gas storage |
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| CN108507734B (en) * | 2017-02-28 | 2020-01-03 | 中国石油天然气股份有限公司 | Method for detecting sealing performance of salt cavern |
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| CN109599578B (en) * | 2018-10-25 | 2021-02-19 | 中盐金坛盐化有限责任公司 | Salt cavern-based electrolyte reservoir tightness detection method and detection device thereof |
| CN109506850A (en) * | 2018-11-19 | 2019-03-22 | 湖北双环科技股份有限公司 | A kind of salt well method for testing tightness |
| CN109307576B (en) * | 2018-12-03 | 2020-07-17 | 中国天辰工程有限公司 | Method and system for testing tightness of salt cavern gas storage |
| CN110005409A (en) * | 2019-05-21 | 2019-07-12 | 中国天辰工程有限公司 | A kind of salt hole air reserved storeroom venting test containing gas well method and system |
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| CN111257209B (en) * | 2020-01-23 | 2021-11-19 | 中国矿业大学 | Experimental device for simulating corrosion effect of saturated brine in waste salt cavern on top plate |
| CN112228071B (en) * | 2020-09-29 | 2022-01-11 | 中国科学院武汉岩土力学研究所 | Method for detecting gas storage performance of brine mining dissolution cavity of high-impurity salt mine |
| CN113137278B (en) * | 2021-04-30 | 2022-07-29 | 中国石油天然气股份有限公司 | Salt cavern gas storage reveals emergency processing system |
| CN114674509B (en) * | 2022-03-25 | 2023-12-19 | 机械工业勘察设计研究院有限公司 | Water tightness detection method for existing salt cavern cavity |
| CN116484761B (en) * | 2023-04-21 | 2023-12-26 | 中国科学院武汉岩土力学研究所 | Salt cavern hydrogen storage tightness prediction and evaluation method and related equipment |
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Patent Citations (6)
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| US3580055A (en) * | 1968-10-25 | 1971-05-25 | Kent Moore Corp | Tank system tightness tester |
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| CN102798507A (en) | 2012-11-28 |
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Inventor after: Yan Yifei Inventor after: Yan Xiangzhen Inventor after: Li Jianzhong Inventor after: Yang Xiujuan Inventor after: Wang Tongtao Inventor after: Li Qi Inventor after: Yu Benfu Inventor before: Yan Yifei Inventor before: Wang Tongtao Inventor before: Yan Xiangzhen Inventor before: Yang Xiujuan Inventor before: Jiang Tingting |
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Free format text: CORRECT: INVENTOR; FROM: YAN YIFEI WANG TONGTAO YAN XIANGZHEN YANG XIUJUAN JIANG TINGTING TO: YAN YIFEI YAN XIANGZHEN LI JIANZHONG YANG XIUJUAN WANG TONGTAO LI QI YU BENFU |
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