低孔低渗复杂油水层的油水同层识别方法

针对低孔低渗储层束缚水饱和度高、油水同层发育、偏油同层与偏水同层识别技术不完善、射孔难度大的实际情况，以大庆西部外围某油田为例，利用依据压汞资料反演所求取的含水饱和度Sw与依据油水两相渗流实验所求取的束缚水饱和度瓯的交会图，能较好的识别偏油同层、油水同层及偏水同层，符合率达77.8％，该方法对低孔低渗储层油水同层识别及射孔方案编制工作具有一定的指导意义。

A Method to Identify Complex Oil and Water Coexistence Reservoirs with Low Porosity and Permeability

Most low porosity and permeability reservoirs are high in irreducible water saturation and well developed in oil and water coexistence ,with a situation of imperfect techniques to identify oil-prone coexistence reservoirs and water-prone reservoirs and of well perforation difficuhy.A peripheral oilfield in the western Daqing was chosen as an example,where oil-prone zones,oil and water equivalent zones and water-prone zones can be identified better,with an accuracy at 77.8%,by using a crossplot between water saturation （Sw） from inversing mercury penetration data and irreducible water saturation（Swi） from a two-phase flowing experiment.This method is quite helpful to identification of oil-water coexistence reservoirs with low porosity and permeability and making well perforation plans.