大庆油田分子膜驱油室内实验研究

Experiment research on molecular deposition flooding in Daqing Oilfield

选取大庆油田主力油层的砂岩岩心,测定分子膜驱的相对渗透率曲线和岩心的润湿性变化,在水驱、聚合物驱和三元复合驱后进行了不同浓度、不同注入量的分子膜驱油实验。结果表明:分子膜驱相对于水驱可降低残余油饱和度,提高驱油效率;可使岩心表面的润湿性由亲油向亲水方向转化;在水驱、聚合物驱和三元复合驱的基础上,分子膜驱可进一步提高采收率。

The relative permeability and wettability of molecular deposition flooding are measured using cores from the main sandstone reservoirs of Daqing oilfield.Experiments of MD flooding at different concentration and injection rate are carried after water flooding,polymer flooding and ASP flooding.The results show that molecular deposition flooding can reduce Sor than water flooding,and enhance the efficiency of oil displacement;it can change core wettability from hydrophobic to hydrophilic;and it can further enhance oil recovery on the basis of water flooding,polymer flooding and ASP flooding.