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直罗油田位于鄂尔多斯盆地中部偏西南位置,主要开发层位为三叠系延长组长2,根据储层岩石力学特征和孔隙结构特征,分析长2储层的孔隙类型及孔喉分布,进一步从长2储层的样品物性分析出发,确定出长2储层的孔隙度和渗透率范围及相关性,进而通过野外露头观察和取芯分析,确定了天然裂缝的类型及特征,最后采用理论计算法、动态分析法和现场测试法,确定了压裂形成的人工裂缝主要为垂直缝。
The Zhiluo Oilfield is located in the southwest of the Ordos Basin. The main development layer is the Triassic Yanchang Formation 2. According to the rock mechanics characteristics and pore structure characteristics of the reservoir, the pore types and pore-throat distribution of the Chang 2 reservoir are analyzed. Based on the analysis of sample physical properties of Chang2 reservoir, the porosity and permeability range and correlation of Chang2 reservoir were determined. Then the types and features of natural fractures were determined by field outcrop observation and coring analysis. Finally, theoretical calculations Method, dynamic analysis method and field test method to determine the artificial fractures formed mainly vertical cracks.