【摘要】 靖边-吴旗地区延长组低渗透储层发育,研究程度低,勘探、开发难度大。应用岩心观察、岩心分析、岩石薄片和测井、地震等资料,综合研究研究区长63储层特征,预测了优质储层的发育情况。结果表明,长63油组储层岩性主要为岩屑质长石细砂岩,碳酸盐岩胶结为主,粒间孔为主要的孔隙类型,属于低孔-低渗、特低渗储层。影响储层物性的因素主要包括岩性、胶结物含量、孔隙类型和沉积相类型几个方面。研究区好储层、中等储层主要发育在水下分流河道微相和远砂坝微相发育部位。更多还原

【Abstract】 In Yanchang Formation of Jing’an-Wuqi Area,low-permeability reservoirs were grown,exploration and development were difficult.Date of core observation,core analysis,thin section,well-logging and seism were used to comprehensively study the characteristics of Chang 63 Reservoir and predict the growth of optimal reservoirs.The result indicates that the Chang 63 reservoir consists mainly of lithic arcose and fine sandstone and carbonate cementation.The intergranular pores are the main pore types,which belong to low porosity,low permeability and extra low permeability reservoirs.The factors influencing the reservoir properties mainly consist of lithologic property,cement content,pore types and types of sediment facies.The high-quality and medium reservoirs are developed in the microfacies of underwater distributary channels and distal bars.更多还原