Device for recycling vent natural gas by hydrate method

Abstract

The invention relates to recycling of oil field vent natural gas, and particularly relates to a device for recycling vent natural gas in the production process of an oil-gas field. The device comprises a filter, a one-way gas valve, a gas buffer tank, a self-operated pressure valve, a compressor, an evaporator, a hydration separating unit, a gas storage tank, a bi-directional gas valve, a stop valve, a slurry pump, a screw pump, a laval spray valve, a surface active agent storage tank, a crusher, an ice-making device, a vertical type three-phase separator, a storage cavern, an air cooler, a throttle valve, a flow distributor, a water pump, a one-way valve, a bi-directional valve, a gas-liquid separator, a hydration recycling unit and a saturation stability unit. Through material cycle and refrigeration cycle of the device, the vent natural gas can be effectively recycled.

Description

technical field [0001] The invention relates to recovery of vented natural gas in an oil field, in particular a set of devices for recovering vented natural gas in the production process of an oil and gas field. Background technique [0002] During the production process of oil and gas fields, there is a lot of natural gas that is vented; according to incomplete statistics, the annual amount of natural gas vented by domestic oil and gas fields reaches 10×10 8 m 3 . In order to improve economic benefits, reduce energy waste, and achieve the goal of energy conservation and emission reduction, it is necessary to rationally recycle and utilize vented natural gas resources. [0003] The vented natural gas mainly comes from three aspects: 1) During the development of gas fields, in order to ensure safe production, the venting of natural gas is inevitable. 2) In the gas-gathering station, the gas in the pipe must be vented due to in-station maintenance and equipment maintenance ...

AI Technical Summary

Problems solved by technology

2) In the gas-gathering station, the gas in the pipe must be vented due to in-station maintenance and equipment maintenance and replacement

3) Some oil fields have low associated gas content, are located in remote areas, and have inconvenient transportation. In addition, domestic oil and gas fields have been in rolling development and lack facilities for recovering natural gas from test production, so they can only be vented for a long time

The application of these technologies has the disadvantages of large initial investment, complex operation and maintenance, long investment recovery period, high safety requirements, many follow-up supporting facilities, and heavy workload; A natural gas recovery device with strong performance and low follow-up resource occupation

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