西峰油田合水地区长8储层特征研究

西峰油田自投产以来还未对影响开发效率的储层孔隙结构、裂缝、敏感性等开展专项研究。在前人研究的基础上，进行了野外岩心观察、室内薄片鉴定、古地磁试验、黏土X衍射分析、敏感性分析、水驱油试验、非均质性研究等多项研究。认为长82的储层物性略好于长81的储层物性；研究区的敏感性较弱，对开发影响不大；微观、宏观的裂缝均较发育，对研究区储层有控制作用，宏观裂缝主方向是南西、北东向。

Research on the Characteristics of Chang 8 Reservoir in Heshui Distinct of Xifeng Oil Field

The special researches on the pore textures, fracture and sensitivity of Chang 8 reservoir that have influence on the development efficiency of Xifeng Oil Field haven＇ t been made since Xifeng Oil Field is put into operation. Based on the former studies, this paper carries out the field observation of rock core, indoor thin section identification, tesr on paleomagnetism, X-ray diffraction analysis of clay minerals, sensitivity analysis, tesr on oil-displaced by water, and heteroheneity study, etc. The results of research indicate that the physical properties of Chang 82 reservoir is a little better than that of Chang 81 reservoir, the sensitivity is weaker and has little effect on the development, both microscopic and macroscopic fractures are developing well and have control action on the reservoirs with the study area, and the main orientation of macroscopic fractures points to the southwest and northeast.