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通过岩心描述和三维有限元数值模拟,对静北潜山油藏裂缝的分布特征和发育规律进行了研究.该潜山主要发育北东、北西向系统裂缝和呈网状分布的非系统裂缝.前者是区内油气的主要渗流通道,具有与正断层相一致的分布样式;后者是主要的储集空间.裂缝的平均分数维D值1.44,连通性好,夹层中裂缝也较发育,该油藏整体上表现为块状特征.裂缝发育带呈北西西向展布,其发育程度受岩性、层厚和断层等因素控制.
Through the core description and 3D finite element numerical simulation, the distribution and development of fractures in the Jingbei Buried Hill Reservoir are studied.The fractures in the NE and NWW systems and the non-systematic fractures in the network are mainly developed in this buried hill. The former is the main seepage channel of oil and gas in the area and has the same distribution pattern as the normal fault.The latter is the main reservoir space.The fracture average fractal dimension D value is 1.44 and the connectivity is good and the cracks in the interlayer are more developed The reservoir is characterized by massive features as a whole.The fractures developed from NW to WX and their development degree is controlled by lithology, layer thickness and faults.