Depositional Settings and Enrichment Mechanism of Organic Matter of the Black Shales at the Bottom of Niutitang Formation,Lower Cambrian in Southeast Chongqing:A Case Study from Well Yuke 1

摘要

As one of the most significant research targets of the Southern Marine Shale Gas Exploration and Research in China,Niutitang Formation of Lower Cambrian in Southeast Chongqing developed black shale series which enriched in organic matter at its bottom.Its average total organic carbon(TOC)was 3.75%.Shale gas was