The reservoir is mainly composed of lithic arkoses, some lithic feldspathic sandstones, and feldspathic litharenite sandstones.
本区储层岩性以岩屑长石砂岩为主, 部分为岩屑质长石砂岩和长石质岩屑砂岩.
They mainly consist of sandstone, in which quartz arenite and litharenite and arkose is lack.
碎屑岩以砂岩类为主, 其中又以石英砂岩类和岩屑砂岩类为主,缺少长石砂岩类.