A kind of skid device and process method for gas injection and production gas collection and transportation in salt cavern gas storage

A gas storage, gas injection and production technology, which is applied in the fields of mining fluid, earthwork drilling and production, wellbore/well components, etc., can solve the problems of long construction period, high production cost, and many construction personnel, and achieve improved safety and Reliability, reduce equipment investment, and reduce production cost

Active Publication Date: 2016-06-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. The gas injection and production process at the original well site uses a combined injection and production pipeline, and the gas production process at the well site uses an electric pressure regulating valve to adjust the natural gas pressure of the gas production pipeline. At the same time, a spare pipeline is used, which increases the investment in well site equipment and is inconvenient for later maintenance
[0008] 2. The filter separator needs to replace the filter element regularly. If there is no spare separator on site, the construction process will inevitably affect the progress of gas production conditions; if the filter element is delayed or not updated, blockage will easily occur, which will affect the normal operation of single well gas injection and production
[0009] 3. The filter separator is equipped with a vent pipe, and the natural gas in the vent pipe is directly vented, the production cost is high, and it is easy to pollute the environment; at the same time, the outlet pipeline of the well site is not provided with a vent pipe, which is prone to unsafe accidents
[0010] 4. The single well site covers an area of ​​about 450m 2 , it will take 2 to 3 years for the construction of gas injection and production process equipment at the well site after the cavity construction is completed. There are many construction personnel, long construction period, and large floor area, which increases the production cost of the gas storage

Method used

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  • A kind of skid device and process method for gas injection and production gas collection and transportation in salt cavern gas storage
  • A kind of skid device and process method for gas injection and production gas collection and transportation in salt cavern gas storage

Examples

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Embodiment 1

[0031] Embodiment 1: as figure 1 as shown,

[0032] The invention belongs to the application technology in the field of natural gas gathering and transportation of salt cavern underground gas storage, and relates to a skid device for collecting and transporting gas for injection and production of salt cavern gas storage.

[0033] Optimize the process flow of Jintan underground gas storage and realize skid-mounted well site equipment. Through the optimization of the process flow and the research on the skid-mounted equipment at the well site, equipment investment and production costs can be effectively reduced, the injection-production efficiency of the underground gas storage can be improved, and the safety and reliability of the gas storage equipment can be improved.

[0034] Aiming at the problems existing in the construction and operation of Jintan gas storage, the single well well site process and equipment were optimized, mainly including the following aspects: hydrate p...

Embodiment 2

[0051] A kind of skid device for gas injection and production in salt cavern gas storage, such as figure 2 As shown, the first-stage throttling and pressure regulating valve includes a first angle throttle valve 26, the main function of which is to regulate the pipeline flow without adjusting the pressure, so as to avoid excessive gas production flow and keep the salt chamber stable;

[0052] The two-stage throttling and pressure regulating valve includes the second angle throttle valve 27, which mainly regulates the gas pressure in the pipeline, adjusts the pressure to 10MPa, and enters the well site dehydration device to keep the pressure in the well site separator, valves, pipelines, etc. within the design pressure range of the equipment.

[0053] The horizontal gravity separator 1 is connected with the safety valve 16 and the normal pressure sewage tank 24; the other end of the safety valve 16 is connected with the second angle throttle valve 27, and the other end of the ...

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PUM

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Abstract

The invention discloses a gas injection and production skid device and a process method of a salt cavern gas storage, belonging to the technical field of well site gas injection and production. The horizontal gravity separator is connected to the electric ball valve, plug valve, manual ball valve and safety valve; the other end of the first electric ball valve is connected to the angle throttle valve; the other end of the angle throttle valve is connected to the second electric ball valve, and the second electric ball valve The other end of the ball valve is connected to the wellhead; the other end of the manual ball valve is connected to the axial flow check valve and the ultrasonic flowmeter, the other end of the axial flow check valve is connected to the third electric ball valve, and the other end of the third electric ball valve is connected to the wellhead; The valve is connected to the instrument connector and the fourth electric ball valve, the other end of the fourth electric ball valve is connected to the methanol injection port, and the other end of the methanol injection port is connected to the other end of the ultrasonic flowmeter; the other end of the cock valve is connected to the normal pressure sewage tank; Methanol dosing The device is connected to the methanol injection port. Improve the injection-production efficiency of underground gas storage, and improve the safety and reliability of gas storage equipment.

Description

technical field [0001] The invention relates to a gas injection and production skid device and a process method of a salt cavern gas storage, and belongs to the technical field of gas injection and production at a well site. Background technique [0002] At present, the main body of the surface engineering of Jintan gas storage has been completed and put into use, and the construction of the gathering and transportation system is in progress. According to the construction and operation of the gas storage in the past few years, the completed parts (including the west gas injection and production station, 5 old cavity well sites, and the east water injection station, etc.) can basically meet the design and use requirements. [0003] The main problems focus on the status quo of the gas storage being built and operated at the same time. It is hoped that by optimizing the ground gathering and transportation system, the gas injection and brine discharge and gas injection and produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00
Inventor 杨海军黄维和郝兴国李龙方亮程林王伟黄坤吴晓南宋欢欢
Owner PETROCHINA CO LTD
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