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Device and method for collecting cushion gas, intelligent equipment and storage medium

A technology for collecting pad and bottom gas, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., and can solve the problem of unusable bottom gas

Inactive Publication Date: 2020-05-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, during the multi-cycle operation of the salt cavern gas storage, the bottom gas is in an unusable state

Method used

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  • Device and method for collecting cushion gas, intelligent equipment and storage medium
  • Device and method for collecting cushion gas, intelligent equipment and storage medium
  • Device and method for collecting cushion gas, intelligent equipment and storage medium

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Embodiment Construction

[0050] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0051] figure 1 It is a schematic structural diagram of a device for collecting bottom gas provided in an embodiment of the present application, such as figure 1 As shown, the device includes: downhole water injection and brine discharge pipe 1, injection and production pipe 2, production casing 3, cement sheath 4, surface casing 5 and permanent divider 6; downhole water injection and brine discharge pipe 1 is connected to the brine discharge port and injection The brine mouth, the distance between the bottom end of the downhole water injection and brine discharge pipe 1 and the wellhead is the first distance; the injection and production pipe 2 is located outside the downhole water injection and discharge brine pipe 1, the production...

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Abstract

The invention discloses a device and a method for collecting cushion gas, intelligent equipment and a storage medium and belongs to the field of natural gas gathering and transportation engineering. Brine can be injected into a gas storage through an underground water injection brine discharging pipe, cushion gas in a cavity can be replaced by means of the injected brine, and the cushion gas is discharged through a first annulus formed by the underground water injection brine discharging pipe and an injection-production pipe. As the injected brine can maintain the lowest operating pressure ofthe cavity of the gas storage of a salt cavern, the cushion gas which cannot be recovered originally can be recovered to use, so that the storage cavity utilization ratio of the gas storage is improved effectively.

Description

technical field [0001] This application relates to the field of natural gas gathering and transportation engineering, in particular to a device, method, intelligent equipment and storage medium for collecting bottom gas. Background technique [0002] In order to maintain the minimum operating pressure of the cavity of the salt cavern gas storage, a bottom gas will remain in the salt cavern gas storage. At present, during the multi-cycle operation of the salt cavern gas storage, the bottom gas is in an unusable state. Only when the salt cavern gas storage is abandoned, the bottom gas can be exploited for utilization. Usually, the amount of bottom gas can account for 27.5% to 40% of the total gas volume of the salt-cavern gas storage. Based on this, it is urgent to provide a device and method for collecting bottom gas, which can ensure that the cavity pressure of the salt-cavern gas storage is not less than the minimum operating period during the operation of the salt-cavern...

Claims

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Application Information

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IPC IPC(8): E21B43/00E21B43/16E21B41/00
CPCE21B43/00E21B43/16
Inventor 李建君刘春
Owner PETROCHINA CO LTD
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