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裂缝性低渗透砂砾岩油藏普遍蕴藏于鄂尔多斯盆地三叠系储层中。裂缝的发育、形态以及分布情况已经成为制约油田有效开发的关键因素之一。在长期生产实践中,裂缝形态与井网系统的匹配关系以及油田生产后期水力压裂裂缝半长的定量化预测研究逐渐成为油藏开发不可或缺的部分。该文通过对裂缝进行数值模拟研究,确定了裂缝发育的三种形态所对应的三种最佳的井网形式并选择5种方案模拟裂缝,从而得出最佳的人工裂缝半长。
Fractured low-permeability glutenite reservoirs are commonly found in Triassic reservoirs in the Ordos Basin. The development, shape and distribution of fractures have become one of the key factors restricting the effective development of oilfields. In the long-term production practice, the matching relationship between fractures and well pattern and the quantitative prediction of half-length fracturing fractures in the late stage of oilfield production have become an indispensable part of reservoir development. In this paper, by numerical simulation of cracks, the three best patterns of well pattern corresponding to the three patterns of fracture development are determined, and five schemes are selected to simulate the cracks so as to obtain the best half-length of artificial fractures.