Abstract: Combining with the physical property data in the study area, logging interpretation results and field test data, the distribution function curve method and the method of oil are used to calculate the physical property lower limit and depth of the effective reservoir in the lower member of Sha 3 of Chengnan fault zone. The physical relationship between them is fitted by software. On this basis, the controlling effects of burial depth, lithology, sedimentary facies and diagenesis on the development of effective reservoirs in the study area are discussed. The results show that the effective reservoir property in the study area by the factors such as buried depth, sedimentation and diagenesis control together, effective reservoir physical property lower limit decreases with increasing of buried depth, advantage for fine breccia facies and conglomeratic sandstone, due to the deep compaction cut hole depth obviously later dissolution as the main mechanism of hole, which is the main control factors of sedimentary facies. The effective reservoir in the study area are mainly distributed in the nearshore submarine fan, sublacustrine fan and fan delta, fan delta deposition is the most favorable sedimentary facies.

Key words: Chengnan fault zone, Effective reservoir, Glutenite, Physical property lower limit, Control factors

摘要： 结合研究区物性资料、测井解释结果及油田试油资料，综合运用分布函数曲线法和石油法，求出埕南断裂带沙河街组沙三下亚段有效储层物性下限和深度的数值，通过软件拟合出两者之间的物理关系，在此基础上探讨了埋深、岩性、沉积相以及成岩作用对研究区有效储层发育的控制作用。结果表明，研究区有效储层物性受埋深、沉积作用以及成岩作用等因素共同控制，有效储层物性下限随埋深增加而降低，优势岩相为细砾岩和砾状砂岩，由于埋深较深压实减孔作用明显，后期溶蚀为主要的增孔机制，其中沉积相为主要控制因素，研究区有效储层主要分布在近岸水下扇、湖底扇及扇三角洲沉积中，扇三角洲沉积为最有利的沉积相。

关键词: 埕南断裂带, 有效储层, 砂砾岩, 物性下限, 控制因素