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裂缝性低渗透油藏在我国石油工业中占有十分重要的地位,如何实现这类油藏的经济、高效开发是石油部门的重要课题。根据裂缝性低渗透的渗流特征和裂缝分布特点,建立了裂缝性低渗透油藏渗流等效连续介质模型,编制了相应的裂缝性低渗透油藏数值模拟软件。利用该软件对两井油田让11区块进行了模拟,分析了不同注采方式、不同井距下的各方案的驱油效果和经济评价指标,优选出适合于该模拟区块的开发方案。计算结果表明,矩形井网最适合低渗透油藏,且井距取250m时各项经济指标最优。可为裂缝性低渗透油藏开发方案的优化提供参考。
Fractured low-permeability reservoirs occupy a very important position in China’s oil industry. How to realize the economical and efficient development of such reservoirs is an important issue for the oil sector. According to the seepage characteristics of fractures and low permeability and the distribution characteristics of fractures, a seepage equivalent continuum model of fractured low permeability reservoirs is established, and corresponding fractured low permeability reservoir numerical simulation software is prepared. The software was used to simulate the block 11 in Liangjing Oilfield. The oil displacement effect and economic evaluation index of each scheme with different injection methods and different well spacing were analyzed. The development plan suitable for this simulation block was optimized. The calculation results show that the rectangular well pattern is most suitable for low permeability reservoirs, and the economic indicators are the best when the well spacing is 250m. It can provide reference for the optimization of fractured low permeability reservoir development plan.