摘要
东海陆架盆地是在元古界、古生界复杂基底上发展形成的中-新生代叠合含油气盆地,蕴藏丰富的油气资源,对中国的能源战略意义重大,东海陆架盆地中生界将是未来中国东部油气勘探新区及重要领域。台北坳陷位于东海陆架盆地西部坳陷带南部,中生界陆相河湖沉积体系发育福州组泥岩、石门潭组泥岩两套主力烃源岩。根据台北坳陷烃源岩、储盖组合、输导体系等油气藏形成的静态要素为基础,结合油气来源和成藏期次分析,研究其成藏过程,明确了台北坳陷以福州组、石门潭组为主力烃源,福州组、石门潭组及始新世瓯江组砂体为主要储层,油气沿着凹陷边缘的砂体、活动的断层运移,砂体尖灭和断层封闭时期,油气早期成藏;始新世末-渐新世的全盆性挤压反转,油气重新调整聚集成藏。从而建立起台北坳陷中生界早期成藏,后期调整的成藏模式。
The East China Sea Shelf Basin is a Mesozoic-Cenozoic superimposed petroliferous basin formed upon a complicated ProterozoicPaleozoic basement.It is rich in oil and gas resources and,therefore,of great significance to China’s future energy strategy.The Mesozoic of the basin is expected to be a new oil and gas exploration target and even an important field in future in east China.The Taibei Depression is located in the southwestern Depression of the East China Sea Shelf Basin.In the Mesozoic continental fluvial and lacustrine depositional systems,there are two sets of source rocks:Fuzhou Formation mudstone and Shimentan Formation mudstone.Based on the static factors for hydrocarbon accumulation,such as source rocks,reservoir-cap assemblages and transportation systems in the Taipei Depression,through the analysis of the timing of source rock deposition and hydrocarbon accumulation,we studied the forming process of oil accumulations in the Taibei Depression.It is rather clear that the Fuzhou Formation and the Shimentan Formation are the main hydrocarbon sources.The sand bodies of the Fuzhou Formation,Shimentan Formation and Eocene Oujiang Formation are the main reservoirs.Oil and gas migrate along sand bodies and active faults around the margin of the depression.Early hydrocarbon accumulated in the pinch out of sandbodies and/or sealed by faults.Oil and gas readjustment and reaccumulation occurred in the whole basin while compression inversion happened by the end of Eocene to Oligocene.Finally,a reservoir-forming model for early and later adjustment of Mesozoic in the Taipei Depression is established.
作者
刘建
谢睿
徐敏
林小云
LIU Jian;XIE Rui;XU Min;LIN Xiaoyun(Hubei Collaborative Innovation Center for Unconventional Oil/Gas,Yangtze University,Wuhan 430100,China;Key Laboratory of Oil and Gas Resources and Exploration Technologies,Yangtze University,Ministry of Education,Wuhan 430100,China;College of Geosciences,Yangtze University,Wuhan 430100,China;School of Energy Resources,China University of Geosciences,Beijing 100089,China)
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2019年第6期150-158,共9页
Marine Geology & Quaternary Geology
基金
国家科技重大专项“近海中、古生界残留盆地特征及油气潜力”(2011ZX05023-003)
关键词
台北坳陷
福州组
石门潭组
油气来源
成藏期次
成藏模式
Taibei Depression
Fuzhou Formation
Shimentan Formation
source of hydrocarbon
hydrocarbon generation time
hydrocarbon generation pattern