Dongsheng Gas Field "Green" Gas Production Technology Promotes Green Development of Gas Field

China Petroleum & Chemical News.
com.
cn recently, Dongsheng Gas Field JPH-346 well implemented the "bubble drainage +" drainage combination technology and successfully resumed production.
The production status changed from intermittent production to continuous production, and the daily recovered gas volume reached 12,000 cubic meters
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In the early development of Dongsheng Gas Field, the second gas production plant mainly used wellhead blowout and drainage for fluid accumulation wells to remove wellbore fluid and restore gas well pressure.
Usually, a gas well needs to vent more than 600 cubic meters of gas during blowout and drainage.
, Economic and environmental protection needs to be improved
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In recent years, the Second Gas Production Plant has been adhering to the green and efficient production principle of “dedicating clean energy and practicing green development”, taking the establishment of a green enterprise as the starting point, and actively carrying out research on various new technologies for drainage and gas production, and gradually replacing wellhead blowout discharge.
Liquid measures
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Based on the concept of the whole life cycle of the gas well and the theory of liquid and bubble, the technicians of the gas production process room of the Second Gas Production Plant established a critical liquid-carrying model of the gas well borehole, forming a "four-line six-zone" working condition identification method, and dividing the gas well production into three In each stage, it guided the supporting processes of drainage and gas recovery, and formed a green and environmentally friendly drainage and gas recovery process system with gas field characteristics as the main body of "bubble drainage+"
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In view of the different fluid accumulation conditions of various gas wells, the technicians implemented different strategies, and adopted optimization pipe string, wellhead liquid separation, foam drainage, automatic intermittent, negative pressure gas production, plunger drainage, mechanical drainage, and the same well.
Measures such as drainage and gas recovery, such as production and injection, have increased the use of compound drainage technology this year, carried out the "bubble drainage + gas lift" combined production resumption method, and implemented the combination of "bubble drainage + negative pressure", "bubble drainage + plunger" and other combinations Drainage and production technology, and actively explore the new technology of high water-cut gas reservoir production, injection and drainage in the same well, greatly reducing the frequency of wellhead blowout and drainage operations, and effectively promoting energy conservation and emission reduction in gas fields
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　　While reducing blowout and liquid discharge measures, the second gas production plant has continued to optimize and improve its technology.
Gas production wellhead automation uses wind-solar complementary green energy as information energy.
At present, all gas field production wells have been implemented; bubble drainage technology uses wellhead electric The remote automatic filling method of pumps and pneumatic pumps not only improves the bubble discharge effect, but also reduces the energy consumption of manual filling vehicles.
At present, 179 sets of automatic dosing devices are implemented; the automatic intermittence uses solar energy as the power source, which has been implemented 7 Sets of automatic indentation equipment; negative pressure gas production wells are powered by gas, currently 49 sets are implemented, which reduces diesel consumption by nearly 20 tons per day; the same well production and injection process adopts manual lifting technology, and the produced fluid is reversed in the wellbore and directly returned The injection to the upper strata greatly reduces the transportation and processing costs of the produced fluid.
At present, the cumulative gas production has increased by 39 million cubic meters, and the cumulative reduction in the transportation and processing of the produced water is 100,000 cubic meters
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　　At the same time, in order to achieve high-efficiency and recycling of natural gas resources, the second gas production plant also strictly controls the ignition and venting time of gas testing.
The gas-testing and liquid separation process is adopted within 24 hours after the gas is detected, and the produced gas enters the station for production; for remote wells In the mobile recycling method, it is recycled through CNG and then transported to the designated refill point for refilling to the pipe network.
Currently, 13 sets of fixed and mobile recycling equipment are recycled and refilled with 150,000 cubic meters per day
.