Benxi formation belongs to barrier island-tidal flat sedimentology system of terrigenous clasts coast. Reservoir sedimentary facies is mainly barrier island sedimentary.
本区本溪组地层属陆源碎屑海岸沉积体系的障壁岛—潮坪沉积，储层主要为障壁岛石英砂岩。
Laterally they interfinger each other and their sedimentary environment be-longs to the barrier island-la goon system of microtidal coastal type(tidal range0-2m).
它们在横向上呈指状交错关系，其沉积环境隶属于小潮海岸型障壁岛—泻湖沉积体系。
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