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在岩心、铸体薄片、成像测井及地震等资料分析基础上,研究了渤海辽西低凸起JZ25-1S太古宇变质岩潜山储层的岩石学特征、储集空间类型及裂缝发育主控影响因素。研究表明:区内潜山岩性为片麻岩类及其碎裂岩类,矿物结晶较粗、暗色矿物含量低、碎裂作用较强,为储集层发育形成提供了良好的物质基础。储集空间类型包括裂缝、溶蚀孔洞和微孔隙,其中以构造裂缝为主。变质岩储集层裂缝的形成是沙三沉积期拉张应力场和东营期右旋走滑应力场叠加作用的结果。此外,储层裂缝发育的其它控制因素包括储集层岩性、古风化作用及后生成岩作用等。
Based on the analysis of core, cast thin slice, imaging logging and seismic data, the petrological characteristics, reservoir space types and main fault control of JZ25-1S Archean metamorphic buried hill reservoir in Liaoxi, Liaoning Province are studied. Influencing factors. The research shows that the buried hill rocks in the area are gneissic and cataclasitic, with coarse crystalline minerals, low dark mineral content and strong fragmentation, which provide a good material foundation for the formation and development of the reservoir. The types of reservoir space include fractures, dissolved pores and micropores, of which structural fractures dominated. The formation of the metamorphic reservoir fractures is the result of the superposition of the tensile stress field during the depositional period of the Es3 and the dextral strike-slip stress field during the Dongying period. In addition, other controlling factors for the development of reservoir fractures include reservoir lithology, paleoclimate and post-secondary rock formation.