摘要
通过地球化学分析、储层沥青薄片镜下鉴定,对川东南下寒武统牛蹄塘组烃源岩宏观特征以及微观地球化学特征进行深入研究,并以震旦系灯影组古油藏为例分析了烃源岩的有效性。结果表明,牛蹄塘组烃源岩厚度稳定,底部暗色泥页岩分别厚约25m～43m,平均有机碳含量介于0.5%～1.0%,现今已达过成熟阶段,为中等烃源岩。牛蹄塘组泥页岩是灯影组古油藏的主要烃源岩,古油藏原油裂解气是灯影组气藏成藏的物质基础。
This paper deals with geological and geochemical characteristics of hydrocarbon source rock in the Lower Cambrian Niutitang Formation in southeast Sichuan and makes an approach to validity of the source rock by the example of oil reservoir in the Sinian Dengying Formation. The results indicate that 25-43 m thick argillaceous shale in the Lower Cambrian Niutitang Formation as the hydrocarbon source rock of the Sinian oil reservoir is characterized by stable thickness with mean organic carbon content of 0.5-1.0%.
出处
《四川地质学报》
2012年第1期69-73,共5页
Acta Geologica Sichuan
关键词
牛蹄塘组
烃源岩
古油藏
川东南
Niutitang Formation
hydrocarbon source rock
validity
fossil oil reservoir
southeast Sichuan
