中文摘要：

采用油藏工程方法,研究了长庆油田五里湾一区长A油藏试验区增油效果及影响因素.从作用机理出发,以注水井组为基本单元,对比分析注入参数和地质因素对驱油效果的影响.结果表明：在一定范围内,表面活性剂注入质量浓度越高,油层渗透率、有效厚度越大,注表面活性剂前采出程度越低,增油效果越好;矿场表面活性剂注入质量浓度和注入量远远小于室内实验最佳值,提高注入质量浓度、增加注入体积,增油效果会更加明显.试验进行26个月时,累计增油量达18 196 t,效果显著,技术可行.

英文摘要：

With the help of reservoir engineering methods, the oil incremental effects and influencing factors are studied for Chang A reservoir＇s sttrfactant flooding test. From the viewpoints of the flooding mechanism, taking wa- ter injector group as the basic unit, the influences of the injection parameters and geological factors on the oil dis- placement effects are contrasted and analyzed. The results show that within a certain range, the higher the injection mass concentration of the surfactant is and the bigger the reservoir permeability and effective thickness are, the low- er recovery degree and better oil incremental effect will be; the injection mass concentration and volume are far less than the experimental optimum values, higher injection mass concentration and larger injection volume and much better oil incremental effect are achieved. Test for 26 months, the cumulative incremental oil is up to 18 196 t, the effects are obvious. In a word, the technique is feasible and practical.