石油二次运移不同模式条件下含油饱和度测量

石油二次运移具有活塞式、指进式、优势式3种不同模式。利用湿填模型,在仅有浮力作为运移动力、以泵压和浮力综合作用作为运移动力的实验条件下,用不同粒度、不同充填介质填装的玻璃管模型系统,观测在3种运移模式条件下路径含油饱和度、残余油饱和度及残余油在通道中所占比例等变化规律。结果表明,路径含油饱和度和残余油量占通道的比例因运移模式不同而明显不同,残余油饱和度则基本不受运移模式的影响。

An experimental study of oil saturation in different secondary migration modes

There are three modes of secondary oil migration,including stable displacement mode,fingering mode, and spring mode.In order to observe the changing patterns of oil saturation,residual oil saturation,and the ratio of residual oil volume to pathway space under these three migration modes,glass cylinder systems with mediums of different materials and different grain sizes packed with wet-packing method were used to carry out experiments with buoyancy as the only driving force or pumping pressure and buoyancy as the combined driving force. The results show that the oil saturation of the migration pathway and the ratio of residual oil volume to inner space of cylinder vary greatly under different migration modes,while the residual oil saturation remains almost the same.