四川盆地及其周缘典型地区龙潭组页岩岩相划分对比及特征

何燚,唐玄,单衍胜,刘光祥,谢皇长,马子杰

Lithofacies division and comparison and characteristics of Longtan Formation shale in typical areas of Sichuan Basin and its surrounding

Yi HE,Xuan TANG,Yan-sheng SHAN,Guang-xiang LIU,Huang-chang XIE,Zi-jie MA

图7 M1和DC1井龙潭组泥页岩孔隙特征 (a)方解石晶体之间紧密镶嵌状接触，见腔孔状生物碎屑粒内孔隙和溶蚀孔隙;(b)方解石晶体呈微晶结构，呈紧密镶嵌状接触，发育次生溶蚀孔隙;(c)方解石晶体呈粒状，粒间孔隙发育;(d)抛光处理样，黑色炭质泥岩，黏土矿物颗粒紧密接触，晶间孔隙发育;(e)石英、长石和黄铁矿粒间孔;(f)抛光处理样，发育黏土粒内溶蚀孔;(g)抛光处理样，黑色炭质泥岩，发育黏土粒内孔;(h)抛光样处理，发育有机质孔和黏土粒内孔

Fig.7 Pore characteristics of shale in Longtan Formation in Wells M1 and DC1