Gathering and transportation skid-mounted device for gas injection and production of salt cavern gas storage and process method

Abstract

The invention discloses a gathering and transportation skid-mounted device for gas injection and production of a salt cavern gas storage and a process method and belongs to the technical field of gas injection and production in a well field. A horizontal gravity type separator is connected with electric ball valves, a plug valve, a manual ball valve and a safety valve; the other end of a first electric ball valve is connected with an angle throttle valve; the other end of the angle throttle valve is connected with a second electric ball valve, and the other end of the second electric ball valve is connected with a wellhead; the other end of the manual ball valve is connected with an axial-flow check valve and an ultrasonic flowmeter, the other end of the axial-flow check valve is connected with a third electric ball valve, and the other end of the third electric ball valve is connected with the wellhead; an emptying valve is connected with an instrument joint and a fourth electric ball valve, the other end of the fourth electric ball valve is connected with a methanol injection port, and the other end of the methanol injection port is connected with the other end of the ultrasonic flowmeter; the other end of the plug valve is connected with a normal pressure blowdown drum; a methanol dosing device is connected with the methanol injection port. According to the gathering and transportation skid-mounted device and the process method, the injection and production efficiency of the gas storage is improved and the safety and the reliability of equipment in the gas storage are improved.

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 injection gas production station, 5 old chamber 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 producti...

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Problems solved by technology

[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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