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本文通过对莱5-4断块油藏数值模拟研究,得出该区的剩余油分布规律及控制因素。在此基础上,通过油藏数值模拟,对水平井平面位置、垂向位置、水平井井网及注水开发效果进行了设计。油藏数值模拟表明,水平井平面位置平行构造、垂向位置位于油层的中上部开发效果最好。考虑到该断块面积小、油层宽度窄、边水活跃等特点设计了3口水平井并设计一口注水井,对注水量进行优化,最终采收率可达22%。研究表明,水平井开发该类薄层油藏可行,为该类油藏水平井开发提供了科学的依据。
In this paper, through numerical simulation of Block 5-4 fault block, the remaining oil distribution and control factors are obtained. On this basis, through the reservoir numerical simulation, the horizontal well position, the vertical position, the horizontal well pattern and the water injection development effect are designed. The reservoir numerical simulation shows that the horizontal well plane has parallel structure and the vertical position is located in the middle and upper part of the reservoir. Taking into account the small area of the fault block, narrow reservoir width and active edge water, three horizontal wells were designed and a single injection well was designed to optimize the water injection rate. The final recovery rate was 22%. The research shows that it is feasible to develop such thin reservoirs in horizontal wells and provide a scientific basis for the development of horizontal wells in such reservoirs.