Huabei Oilfield Drainage Gas Production Technology Research

Some gas wells at HuaBei Oilfield enter water-gas production period after gas resevior began to produce water.Many gas wells had liquid on the bottom hole.even stopped due to bottom hole liquid accomplice with water output was increasing more and more.At that time,gas well could not restsart until bottom hole liquid was lifted out,so water drainage and gas production was existed.In this paper, geology and stimulation were analyzed,divided gas wells into threeparts,analyze the condition of bottom holc liquid of each well.Because many gas wells began to produce water, even stopped.so it is very important to research technology of water drainage and gas production for different gas resevior and different explorering period. In this paper,seven types of technology of water drainage and gas production were compared and recommended to each gas resevior.IPR and TPR was discussed in research of technology of water drainage and gas production,established maths models of water drainage and gas production by plungerand selecting tubing string.Designing method of water drainage and gas production by gas lift was researched.The working and test parameters of gas lift valve was discussed.lt is the first time to design parameters of gas lift valve at higher temperature and deeper depth gas well design,such as the Su 1 block.lt was right after applied on siteTechnologies of of water drainage and gas production were applied to suitable gas resevior.do well in project designing and evaluating results. Method of water drainage and gas production by continualy gas lift was applied at the Su 1 block, the enhanced accumulation gas yield is 7.88 ?106m3 enhanced accumulation oil yield is 901t, enhanced accumulation oil yield is 15584 m3, The remarkable benefit of economy and society was achieved.