利用铸体薄片、扫描电镜及压汞曲线等资料，系统地研究了安塞油田王窑地区长6₁¹储层的岩石学特征、孔隙类型、孔隙结构特征、物性特征及其影响因素，并指出了有利的勘探目标区。综合评价认为：研究区长6₁¹ 储层砂岩类型以长石砂岩为主，孔隙类型为原生粒间孔隙、溶蚀粒间孔隙、溶蚀粒内孔隙、微裂缝等，砂岩储层的铸体薄片面孔率为0.98％～1.37％，平均孔喉半径较小，为典型的中—低孔、低渗储层；影响储层物性的因素主要为沉积环境和成岩作用。

Based on cast thin section, scanning electronic microscope and mercury penetration curves, the petrological characteristics, pore type, pore texture characteristics, reservoir properties and influencing factors of Chang 6₁¹ reservoir are systematically studied, and the favorable exploration target areas are pointed out. Through the comprehensive evaluation, it is considered that arkose is the main sandstone type of Chang 6₁¹ reservoir, and the pore types include primary intergranular pore, dissolved intergranular pore, dissolved intragranular pore and micro-fracture. The plane porosity of cast thin section of the sandstone reservoir ranges between 0.98% and 1.37%, the average throat radius is low, and the reservoir is of typical middle-low porosity and low permeability. The main factors that influence the reservoir properties are sedimentary environment and diagenesis.