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本文根据岩心和铸体薄片观察与储层物性分析,系统研究了鄂尔多斯盆地靖边气田北部马五14亚段的储层特征。结果表明:马五14亚段储集空间以晶间孔、溶蚀孔洞和微裂缝为主,为典型的低孔低渗型储层;溶蚀作用对储层的发育具有决定性作用。根据储层物性和产量等参数,将马五14亚段划分为4类储层,其中Ⅰ、Ⅱ类为优质储层,主要分布在研究区西部和北部。
Based on the observation of core and cast thin slices and reservoir property analysis, the reservoir characteristics of the 14th member of Ma5-14 in northern Jingbian gas field of Ordos Basin are systematically studied. The results show that the intergranular pores, dissolved pores and microcracks are the main reservoir space in the sub-section of Ma-Wu 14, which is a typical low porosity and permeability reservoir. The dissolution plays a decisive role in the development of the reservoir. According to the parameters of reservoir physical property and yield, four sub-sections of Ma Wu 14 are divided into four types of reservoirs, of which type Ⅰ and Ⅱ are high-quality reservoirs, mainly distributed in the west and north of the study area.