Research Of Drainage Gas Recovery Technology In SULIGE Gas Field

With the development of gas field, low voltage, low-yield, producing water wells has increased quickly, but because of low yield these gas wells can not fully meet the requirement carrying liquid so that fluid has been accumulated in well bottom and the gas wells cannot product normally.For the producing water condition and process characteristics in SULIGE gas field this paper has carried the research of adaptability of foam drainage, mechanism of foam and defoam agent. Moreover the paper has evaluated and elected new foam and defoam agents that are suitable in SULIGE field with condensate characteristics and has independently developed a highly efficient anti-oil foam agent. Based on a lot of indoor researches and experiments,478times foam drainage gas recovery tests have been carried in210gas wells in the gas field that has played a significant yield. In addition, for the intermittent well a reasonable carrying liquid system has been researched and13gas wells have been tested. Since the scale development of gas field new technologies tests have been carried out such as capillary tube, gas lift, plunger piston etc. These technologies have played a better yield results and played a good guide in exploring a sequence of drainage gas technologies suitable for SULIGE gas field.