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.

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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.

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