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

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...

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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

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