裂缝型底水油气藏开发模式研究

裂缝型底水油气藏的一个重要特点就是底水供给充足,储油岩层裂缝系统极其发育,造成油气藏极易在开发过程中发生水窜,而裂缝发育的不均质及产状类型的多样化,使水窜进入油气藏后的油气水关系变得十分复杂."水窜式"的活动更多地表现为降低了油气藏的有效厚度和单井泄油范围,在油气层和井筒中消耗油气藏的能量,降低油藏的采收率.针对裂缝型底水油藏水窜特点,在建立基岩-裂缝超双重介质模型基础上,通过全隐式数值模拟研究方法,分析比较了两向裂缝对油气藏动态开发指标的影响.

Study on Development Performance of Fractured Reservoir with Bottom Water

The most two remarkable characteristics of the fractured reservoir with bottom water are that its bottom aquifer is huge and that the reservoir rock fracture network is well developed, both of which will lead to water quickly channeling in the development process, and thus will be complicated the underground fluid flow due to heterogeneity of fracture network and diversity of fracture occurrence types. When the bottom water goes up into the reservoir, it will markedly reduce the reservoir effective thickness and the drainage area of single oil well, deplete the energy in the reservoir and wellbore, and subsequently lower the recovery ratio. According to the geologic characteristics of fractured reservoir with bottom aquifer and on the basis of the matrix -fracture super dual medium model, the influence of two-direction fracture reservoir with bottom aquifer upon reservoir dynamic performance by means of full implicit reservoir numerical simulation was analyzed in detail in the paper.