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研究区作为靖边气田的稳产接替区块,开展对本区储层情况进行研究,综合利用岩心薄片、铸体薄片、扫描电镜、压汞测定等资料,对研究区奥陶系马家沟组马五1+2和马五41亚段的储层特征进行了研究。结果表明:研究区目的层储集岩的类型主要为泥-粉晶白云岩和粉晶白云岩及岩溶角砾岩,孔隙类型以以溶孔、晶间孔为主,膏模孔和微裂隙次之。储集岩的物性较差,平均孔隙度为3.26%,平均渗透率为1.4×10-3m2,且孔隙度与渗透率呈正相关性,总体为非均质性较强的低孔、低渗透储层。
The research area, as a steadily-succeeding block in the Jingbian gas field, conducts a study on the reservoir conditions in this area. Based on the comprehensive utilization of core thin slices, cast thin sections, scanning electron microscopy and mercury intrusion determination, the Ordovician Majiagou formation horses The reservoir characteristics of Wu 1 + 2 and Ma 5 41 sub-zones were studied. The results show that the types of reservoir rocks in the study area are mud-powder dolomite, dolomite dolomite and karst breccia. The pore types are dominated by solution pores and intergranular pores, Second. The physical properties of the reservoir rocks are poor with an average porosity of 3.26% and an average permeability of 1.4 × 10-3m2. The porosity and permeability are positively correlated with each other. Generally, the reservoir rocks are characterized by low porosity and low permeability Floor.