卫81 块低渗透油藏储层地质特征研究

Study on Geological Feature of Low Permeability Reservoir of Wei81 Block

王　军 陈焕杰 柳红春　　

中原石油勘探局勘探开发科学研究院，中原石油勘探局采油四厂

Research Institute of Petroleum Exploration and Development , Henan 457001 , P. R. China

讨论卫81 块的沉积微相、储层非均质性和储层渗流特征。通过研究卫81 块的沉积微相,确定出该块的沉积相、沉积微相类型,勾绘出各小层的沉积微相分区图。储层非均质性研究,通过统计计算非均质参数分别表征出卫81 块的层间、层内、平面及孔隙非均质性。储层渗流特征研究以储层润湿性和相渗曲线为基础,得出卫81 块束缚水饱和度及残余油饱和度值较大的结论。卫81 块储层地质特征研究为治理方案的编制打下基础,最终改善了卫81 块的开发效果。

This paper discusses the sedimentary micro-facie , reservoir heterogeneity and reservoir percolation characteristics of Wei 81 block. By analyzing the sedimentary micro-facies , the micro-facies and their types have been determined , and all of the sedimentary micro-facies maps of layers were completed. Many parameters about reservoir heterogeneous have been calculated , which were used to describe heterogeneity in inter-layer , in-layer , on-layer and porous heterogeneity in Wei 81 block. Based on the reservoir wettability and the phase permeability relationship curves ,it is concluded that irreducible water saturation and residuble oil saturation are higher. These result s in this paper are profitable for drawing up treatment project and to improve development effectiveness.