含凝析油气井起泡剂加注量优化及应用

Optimization and Application of Foaming Agent Filling Volume of Gas Well with Condensate Oil

针对中江气田66产凝析油气井泡排效果不佳问题,通过含油气井泡排携液机理和流动性实验研究发现,由于凝析油的存在,气井中部分起泡剂与井底积液形成乳化结构从而被消耗,仅部分起泡剂能够发挥携液作用。凝析油含量增加10,泡排携液量下降40~60,需提高起泡剂加注量才能提升泡排效果。推导出含凝析油气井起泡剂加注量公式,现场试验结果表明该公式符合现场实际,两口试验井携液量提升80以上,产气量提升45以上,具备推广应用价值。

Aiming at the issue of poor performance of 66 oil and gas wells in Zhongjiang gas field, it is found through the experimental study on the mechanism and flowability of oil and gas wells, because of the existence of condensate oil, some of the foaming agent with liquid loading form emulsion structure and will be consumed.Only part of foaming agent can play the role of carrying liquid.Condensate oil content increases by 10, liquid carrying volume of foam drainage decreases by 40 to 60.The effect of foam drainage can only be improved by increasing the amount of foam agent.The formula of the filling agent of condensate oil gas wells is deduced and the results of the field test show that the formula is in line with the actual situation.Liquid carrying volume of two test wells increases by 80 or more and gas production increases by 45 or more, which has the value for promotion and application.