APPLICATIONS OF GAS PREVENT TECHNOLOGY IN WENLIU OILFIELD

Outgas from oil raservoir is rather serious in Wenliu oilfield. It has a great effect on the efficiency of sucker rod pump. According to statistics of production data of 1992, 31.7% of 249 production welis are in a low efficiency production situation due to effect of gas, whose average pump efficiency is only 19.2%. There are 30 very serious wells among them. In order to overcome the effect of gas on sucker rod pump, we apply many gas prevent techniques such as the glass fiber rod, negative pressure production, small diameter gas anchor and gas prevention pump etc.,by which the pump efficiency is increased, the repair cycle of pump is prolonged, and good results are achieved. This paper analyses the principels and applications of those gas prevent techniques,points out the matters needing attention. The economic evaluation results show that benefits of 35 306 thousand yuan are obtained by applying those gas control measures.