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鄂尔多斯盆地大路沟二区长6储层形成于三角洲前缘水下分流河道,为中-细粒长石砂岩和岩屑长石砂岩。储层孔隙类型以粒间孔及溶蚀孔为主。成岩作用主要有压实作用、压溶作用、胶结作用、交代作用和溶解溶蚀作用等。受沉积相及成岩作用的影响,储层物性具低孔、低渗的特点,据此评价大路沟二区长6储层可分为三类:好储层、中等储层、差储层。主力油层长612主要为好储层,次为中等储层。
The Chang 6 Reservoir of Erluosi Formation in Erdos Basin was formed in the submarine distributary channel of the delta front. It is a medium-fine feldspar and lithic feldspar sandstone. The types of reservoir pores are mainly intergranular pores and erosion pores. Diagenesis is mainly compaction, pressure solution, cementation, account of the role of dissolution and dissolution. Affected by sedimentary facies and diagenesis, reservoir properties are characterized by low porosity and low permeability. Therefore, Chang 6 reservoirs in the Second District of Daluogou can be divided into three types: good reservoirs, medium reservoirs and poor reservoirs. The main reservoir length 612 is mainly good reservoirs, secondary to medium reservoirs.