子洲气田北部山_2~3段储层成岩作用与有利成岩相带分析

On Diagenesis and Favorable Diagenetic Facies Studies for the Reservoirs of Shan_2~3 Section in the North of Zizhou Gasfield

通过观察岩心并收集铸体薄片、扫描电镜、物性等资料,对子洲气田北部山32段储层的岩石学特征、物性特征和成岩作用进行研究,在此基础上对成岩相进行划分并指出有利的成岩相带。共划分出6种成岩相,其中粒间孔+石英弱加大胶结溶蚀相、高岭石+石英加大胶结溶蚀相和杂基微孔溶蚀相为有利成岩相;水云母胶结交代微孔相、钙质胶结交代致密相与硅质胶结致密相为不利成岩相。在有利成岩相中,高岭石+石英加大胶结溶蚀相和粒间孔+石英弱加大胶结溶蚀相在研究区最为发育,是下一步勘探的有利成岩相带。

The research is based on the collected data including properties, electron microscopy scanning and physi- cal property analysis to discuss the petrologic feature, physical property and diagenesis in order to divide diagenetic facies and point out the favorable ones of Upper Paleozoic S1 formation in north Zizhou gas field. There are 6 diage- netic facies zones with variousgenetic types in the study area, of which inter - grain pores ＋ weak quartz overgrowth cemented and corroded diagenetic facies and kaolinite ＋ quartz overgrowth cemented and weak corroded diagenetic facies are the most favorable diagenetic facies. Hydromica cemented and metasomed micropore diagenetic facies, calcareous cemented and metasomed compact diagenetic facies and siliceous cemented compact diagenetic facies are adverse diagenetic facies. Kaolinite ＋ quartz overgrowth cemented and inter - grain pores ＋ weak quartz overgrowth cemented and corroded diagenetic facies are favorable diagenetic facies that most developed in study area which di- recting further gas exploration.