Gas injection and production device and gas injection and production method for salt-cavern gas storage

A technology for gas storage and gas injection and production, which is applied in the fields of fluid production, earth-moving drilling and production, wellbore/well components, etc., and can solve the problems of low gas production rate and low gas production efficiency.

Pending Publication Date: 2022-08-05
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the gas recovery efficiency of the current salt cavern gas storage is low due to the low gas recovery rate at the end of gas production

Method used

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  • Gas injection and production device and gas injection and production method for salt-cavern gas storage
  • Gas injection and production device and gas injection and production method for salt-cavern gas storage
  • Gas injection and production device and gas injection and production method for salt-cavern gas storage

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Embodiment Construction

[0051] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0052] In order to facilitate the understanding of the embodiments of the present application, the following first combines figure 1 The application scenarios of the embodiments of the present application are briefly described. figure 1 It is a schematic diagram of the salt cavern gas storage provided by the embodiment of the present application. see figure 1 , the salt cavern gas storage includes a salt cavity 102 located in the salt layer 101, a production pipe string 103 is arranged in the well connecting the salt cavity 102 and the ground, and a gas guide pipe 104 is arranged in the production pipe string 103, and the gas pipe 104 and the production pipe string 103 A packer 105 is arranged in the annular cavity between, so that the ...

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Abstract

The invention provides a gas injection and production device and a gas injection and production method for a salt-cavern gas storage, and belongs to the technical field of natural gas storage. The gas injection and production device of the salt-cavern gas storage comprises a gas injection and production pipe column and a brine injection and production pipe column, the upper ends of the gas injection and production pipe column and the brine injection and production pipe column are positioned on the ground; the lower ends of the gas injection and production pipe column and the brine injection and production pipe column extend into a salt cavity of the salt cavern gas storage; the salt cavity is communicated with the ground through the gas injection and production pipe column and the brine injection and production pipe column; the lower end of the gas injection and production pipe column is higher than the lower end of the brine injection and production pipe column in the vertical direction; when gas is injected into the salt cavern gas storage, the gas injection and production pipe column injects gas into the salt cavern, so that liquid in the salt cavern flows to the ground through the brine injection and production pipe column; when gas is produced from the salt cavern gas storage, the brine injection and production pipe column injects liquid into the salt cavern, so that the gas in the salt cavern flows to the ground through the gas injection and production pipe column. According to the scheme, the gas production efficiency of the salt-cavern gas storage can be improved.

Description

technical field [0001] The application relates to the technical field of natural gas storage, in particular to a gas injection and production device and a gas injection and production method for a salt cavern gas storage. Background technique [0002] Salt cavern gas storage is a kind of underground gas storage used to store natural gas, hydrogen and other energy gases. Usually, high-pressure gas is stored in the cavity formed by mining underground salt mines through the salt-dissolving process. Salt cavern gas storage has the advantages of flexible gas injection and production and good sealing, and is widely used in natural gas storage. [0003] At present, the compression and expansion of gas are mainly used to realize the gas injection and gas recovery of the salt cavern gas storage. When injecting gas into the salt cavern gas storage, high-pressure gas is injected into the salt cavern gas storage, the gas in the cavity of the salt cavern gas storage is compressed, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/12
CPCE21B43/121Y02E60/32
Inventor 王建夫安国印单保东贾建超王文权徐帅王丹玲宋贾利邢红艳郭雯陈春花赵昕王元庆乔宽张强
Owner PETROCHINA CO LTD
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