琼东南盆地陵水组层序格架及沉积体系的时空配置关系

The temporal and spatial configure relation of sedimentary systems and sequence stratigraphic framework of Lingshui Formation in Qiongdongnan Basin

蔡佳 王华

Cai Jia Wang Hua

中海油研究总院, 北京 100027; 中国地质大学资源学院, 湖北武汉 430074; 中国地质大学(武汉)构造与油气资源教育部重点实验室, 湖北武汉 430074

CNOOC Research Institute, Beijing 100027; Faculty of Earth Resources, China University of Geosciences, Wuhan Hubei 430074; Ministry of Education Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Wuhan Hubei 430074

利用层序地层学、沉积学原理和方法,对琼东南盆地古近系陵水组进行了层序划分和沉积体系时空配置关系的研究。建立了陵水组的层序地层格架,将其划分为Els3、Els2和Els1三个三级层序,其层序和体系域变化主要受控于凹陷内沉降中心的分布位置,沉积主要受控于盆地边缘的断坡带。每个三级层序低位体系域发育局限,海侵与高位体系域发育。沉积体系构成以扇三角洲、三角洲、滨海平原和浅海为主。探讨了沉积体系的演化,总结了其时空配置关系的特点。

Based on the principles of sequence stratigraphy and sedimentology, sequence-stratigraphic framework of Lingshui formation in Qiongdongnan Basin was established, and the temporal and spatial configure relation of sedimentary systems were also studied. The Lingshui Formation was classified into three tertiary sequences.The sequences and system tracts were controlled by distribution of the subsidence centers.And the deposition was mainly controlled by the fault-break zones in the basin boundary.Each LST are limitedly developed, and the TST and HST are well-developed.There are six depositional systems in this area, they are fan delta, delta, coastal plain, and shallow sea respectively.The evolution of the depositional system was studied and the characteristics of the temporal and spatial relation was summarized.

国家自然科学基金资助项目"典型断陷富油气凹陷层序构成样式的差异性研究"(40872077)。

https://doi.org/10.3969/j.issn.1008-2336.2011.01.016