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川中大安寨组是受岩性岩相控制的原生裂缝性油藏。本文论述了该组瓣鳃类骨骼文石的确定、保存及其与油气生成、富集的关系,指出骨骼文石的保存为寻找油气有利地区(块)提供了重要地质信息。
The Da’anzhai Formation in Central Sichuan Basin is a primary fractured reservoir controlled by lithologic facies. This paper discusses the definition and preservation of aragonite aragonite in this group of valves and its relationship with hydrocarbon generation and enrichment. It is pointed out that the preservation of aragonite provides important geological information for the search of oil and gas favorable areas (blocks).