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通过常规物性、铸体薄片、扫描电镜、粒度、高压压汞等实验测试分析,对储层岩石学特征、微观孔隙结构特征进行全面分析。研究表明:该区的储集空间主要为残余的原生孔隙,次为溶蚀孔隙,包含少量微裂缝;根据毛管压力曲线形态以及相应的参数,将储层孔隙结构分为Ⅰ类、Ⅱ类、Ⅲ类、Ⅳ类,四类孔隙结构的储集性能和渗流能力依次变差,研究区以Ⅱ类和Ⅲ类孔隙结构为主。喉道半径是体现孔隙结构品质的直观参数。
The petrophysical characteristics and microscopic pore structure characteristics of the reservoir are analyzed comprehensively through the experimental analysis of conventional physical properties, cast thin films, scanning electron microscopy, particle size and high pressure mercury intrusion. The results show that the reservoir space in this area is mainly residual primary pores, secondary dissolution pores and minor microfissures. According to the capillary pressure curve and the corresponding parameters, the pore structure of the reservoir is divided into Ⅰ, Ⅱ, Ⅲ The storage performance and seepage capacity of the four types of pore structures of the type Ⅳ, type Ⅳ and grade Ⅳ deteriorate in turn, and the type II and type III pore structures are the dominant ones in the study area. The throat radius is an intuitive parameter that reflects the quality of the pore structure.