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Double-well construction method of large gas storage in high-impurity salt mine

A construction method and technology of gas storage, which is applied in ground mining, earth drilling, underground mining, etc., can solve problems such as the inability to build large-scale salt cavern gas storage, and achieve the effect of realizing resource utilization and expanding the scale of construction

Active Publication Date: 2018-02-16
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The present invention solves the technical problem in the prior art that a large-scale salt cavern gas storage cannot be built in a high-impurity salt mine by providing a double-well construction method for a large-scale gas storage in a high-impurity salt mine

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  • Double-well construction method of large gas storage in high-impurity salt mine

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Embodiment Construction

[0045] The embodiment of the present invention solves the technical problem in the prior art that a large-scale salt cavern gas storage cannot be built in a high-impurity salt mine by providing a double-well construction method for a large-scale gas storage in a high-impurity salt mine.

[0046] The technical solution in the embodiment of the present invention is to solve the above-mentioned problems, and the general idea is as follows:

[0047] In the high-impurity salt mine, first open a vertical shaft and an inclined shaft, and connect the vertical shaft and the inclined shaft; then cut the pipe of the inclined shaft, control the expansion of the salt cavern at the end of the inclined shaft, and make the salt cavern at the end of the inclined shaft larger and higher; then Gas is injected into the inclined well, so that the brine in the salt cavern is discharged from the vertical well to the surface. In the prior art, there is a technical problem that large-scale salt cavern...

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Abstract

The invention discloses a double-well construction method of a large gas storage in a high-impurity salt mine. The double-well construction method comprises the steps that a vertical well and a deviated well are excavated; the vertical well and the deviated well communicate; pipe cutting is conducted on the deviated well to form a salt cavern with the vertical well end being lower than the deviated well end; and gas is injected to the deviated well, so that bittern in the salt cavern is discharged out from the ground surface through the vertical well to complete construction of the gas storage. According to the double-well construction method, restriction of objective geological conditions is broken through, and the technical problem that in the prior art, a large salt cavern gas storage cannot be constructed in a high-impurity salt mine is solved.

Description

technical field [0001] The invention relates to the technical field of gas storage construction, in particular to a method for constructing double wells of a large-scale gas storage in high-impurity salt mines. Background technique [0002] At present, salt cavern gas storage has been widely used in developed countries in Europe and the United States, and it is an excellent place for energy storage such as natural gas, hydrogen and air. The main component of salt mines is sodium chloride, which has good water-soluble properties. Therefore, salt-cavern gas storages are usually constructed using the single-well water-soluble method. [0003] During the construction of the salt cavern gas storage, when the soluble salt is dissolved by water, the impurities (including the insoluble matter wrapped in the salt layer and the insoluble matter in the salt interlayer) will be scattered to the bottom of the salt cavern, forming sediment. A large number of voids are formed during the a...

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Application Information

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IPC IPC(8): E21C41/20
CPCE21C41/20
Inventor 施锡林李银平马洪岭杨春和李金龙陈涛王同涛冯晶葛鑫博尹洪武张楠陈祥胜章雨豪
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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