摘要
我国华南地区的二叠系栖霞组岩层中沉积有多套富有机碳的深暗色岩系,是华南地区油气勘探的潜在烃源岩。但这套烃源岩详细的古海洋条件特征尚未完全清楚。选择湖北省恩施剖面的栖霞组下部中的泥质灰岩夹钙质页岩作为研究对象,开展有机质生物标志物组成研究与分析。研究表明,恩施剖面栖霞组下部泥质灰岩生物有机质的来源以海洋浮游藻类为主。恩施剖面栖霞组有机质可能已经达到成熟,已经达到或接近"生油窗"阶段。恩施地区栖霞组早期的水体不是一个缺氧的环境,可能是一个氧化至贫氧的环境。在该环境中有机质较为富集,说明长期贫氧环境也有利于有机质富集。
There are many sets of organic carbon deep dark rock series in the Permian Qixia Formation in Southern China area of China,which is the potential source rock for oil and gas exploration in Southern China area.However,the detailed paleo-marine conditions of the source rocks are not yet fully understood.The argillaceous limestone with intercalation of calcareous shale in the lower part of the Qixia Formation in Enshi section of Hubei province are selected as the research objects,and the organic biomarker composition is studied and analyzed.The results show that the biogenic organic matter in the lower part of the Qixia Formation in Enshi section is mainly derived from marine planktonic algae.The organic matter of the Qixia Formation in Enshi section may have reached maturity and reached or close to the"oil generating window"stage.The paleowater column during the lower Qixia Formation deposition in Enshi was not in an anoxic environment,but probably in an oxic-dysoxic environment.Organic matter accumulated in the oxic-dysoxic environment,indicating that the long-term dysoxic environment favors organic matter accumulation.
作者
耿梓傲
唐瞻文
张璇
韦恒叶
GENG Zi-ao;TANG Zhan-wen;ZHANG Xuan;WEI Heng-ye(School of Earth Science,East China University of Technology,Nanchang 330013,China)
出处
《东华理工大学学报（自然科学版）》
CAS
2019年第4期368-375,共8页
Journal of East China University of Technology(Natural Science)
基金
国家自然科学基金项目(41302021,41762003).
作者简介
耿梓傲(1995—),男,硕士研究生,主要从事沉积学与地球化学研究。E-mail:937773723@qq.com;通信作者:韦恒叶(1980—),男,副教授,主要从事沉积学教学研究。
