Research and application of the injection-production technology in the same gas well with high water production
As to the gas wells with high water production,the large yield water led to the difficulties,such as continuous drainage and surface gas-water mixing transportation,the high cost of produced water treatment and so on.Therefore,based on the research idea of Electric submersible pump deep pumping and no ground treatment of produced water,it was developed a key device of underground gas-liquid flow channel transformation,so as to meet the demand of underground gas-liquid flow channel transformation and effective separation between production and reinjection layers.It was also innovated the injection-production technology in the same gas well of high water production with electric submersible pump,to ensure stable gas production through tubing and direct downhole reinjection of production water from oil jacket annulus.This technology was applied in 42 shut-off gas wells of high production water.After that,the cumulative production increase was 3350×104m3,and all the produced water was reinjected underground.The cost of sewage treatment was saved by 9.26 million yuan.It could make the high water production gas wells economically effective drainage.
High production water gas wellInjection-production technology in the same gas wellUnderground gas-water separationProduced water reinjection
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