基于流动单元的水驱开发效果评价

针对目前笼统评价水驱油藏开发效果的现状,研究了基于流动单元评价水驱开发效果的方法。在单一水下分流河道砂体划分的基础上,选取FZI、孔隙度、渗透率这三种参数为指标划分流动单元。以油水相对渗透率曲线为基础,建立起不同流动单元的含水率-采出程度、存水率-采出程度、水驱指数-采出程度的理论图版,评价水驱开发效果。实例应用结果表明,该方法能够客观表征油藏水驱开发效果的不均一性,为针对性提出挖潜措施,提供指导意义。

Evaluation of Water Flooding Development Effectiveness Based on Flow Unit

Against the status quo for indiscriminately evalating water flooding development effectiveness,a new method based on flow unit was studied.On basis of dividing Single-phase ubaqueous distributary channel,flow units were classified according to FZI,porosity and permeability.Then the theoretical plates of water cut with degree of reserve recovery, net injection with degree of reserve recovery, water flooding index with degree of reserve recovery were established based on oil and water relative permeability curves.According to these plates,the development effectiveness of every flow unit was evaluated. The application results show that this method can characterize the heterogeneity of water flooding reservior, and provide guidance to exploitation measures.