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针对子长热寺湾井区储层特征认识不足的问题,应用岩石薄片、扫描电镜、X衍射、粒度分析、压汞测定等资料,对长2、长6储层的岩石学特征、孔隙类型与孔隙结构特征、物性特征、成岩作用、非均质性特征、储层敏感性及润湿性等进行了深入分析。结果表明:研究区储层以中砂质细粒长石砂岩为主,孔隙类型主要有溶蚀粒间孔和剩余粒间孔,孔隙结构具有均质性较强的特点;成岩作用以压实作用、胶结作用和溶蚀作用为主;根据储层个特征参数,认为长2储层为特低渗透层与超低渗透层,长6储层为超低渗透层。
Aiming at the lack of understanding of the reservoir characteristics of the thermal temple bay area in Zizhang, the petrologic characteristics, pore types, and pore types of the Chang 2 and Chang 6 reservoirs are studied by means of thin sections of rock, scanning electron microscopy, X-ray diffraction, particle size analysis and mercury intrusion porosimetry And pore structure characteristics, physical characteristics, diagenesis, heterogeneity, reservoir sensitivity and wettability were analyzed in depth. The results show that the reservoirs in the study area are dominated by medium and fine grained feldspar sandstone, and the pore types are mainly intergranular pores and intergranular pores. The pore structure is characterized by strong homogeneity. Diagenesis is compacted , Cementation and dissolution. According to the characteristic parameters of reservoir, Chang 2 reservoir is considered to be ultra-low permeability and ultra-low permeability and Chang 6 reservoir is ultra-low permeability.