营11裂缝型低渗透岩性油藏开发方式研究

Research of development plan for Y11 fractured low permeable lithologic oil pool

针对裂缝型低渗透油藏的注水开发水驱效率问题,利用E100数值模拟工具,在分析营11区块裂缝型低渗透油藏储层特征基础上,利用两种方法表征地应力,对裂缝型低渗透油藏地应力与井网形式优化设计理论进行了数值研究,模拟计算了不同裂缝参数、不同井网形式的开发方案,并对各方案实施效果进行了对比研究。结论发现,与营11油藏地应力匹配关系最好的井网形式是五点法井网,同时给出了井排方向与裂缝走向的合理夹角。

Through the analysis of the characteristics of fractures in fractured-low permeability reservoir and of the feasibility of different well patterns,using Eclipse to simulate a couple of programs with different fracture parameter,well pattern and water flooding regime,and combing the characteristics of channel deposit,this paper studies the well patterns used in fractured-low permeability reservoir in Y11 and proposes that the five-spot well pattern is profitable practice applied in fractured-low permeability reservoir.Meanwhile,it also studies and illustrates the practical well the intersection angle between the direction of fractures and that of well lines.The practice discussed in this paper has seen a good outcome when it is applied in designing well pattern for fractured-low permeability reservoir of Y11.It offers support in well pattern optimizing for reservoirs with the same characteristics.