In the process of gas testing in oilfield development,due to the use of torch,a large amount of energy consumption and serious air pol-lution are caused.In order to solve this problem,based on the research background of a gas well in an offshore oilfield,according to the gas re-lease situation of some wells in the area,through the comparison of various known technical means,the CNG technology is used to recover the gas released in the process of trial mining.At the same time,the recovery of the discharged air is further studied,and the technical scheme of the dis-charged air recovery is finally obtained.After half a year of trial production,good results have been achieved,and the effect of recovering all the downhole gas of the produced gas has been achieved.
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