海洋地质与第四纪地质2013，Vol.33Issue(1)：73-82,10.DOI:10.3724/SP.J.1140.2013.01073
南海北部陆缘盆地群新生代构造过程与油气运聚规律
CENOZOIC GEOLOGICAL PROCESSES AND THEIR BEARING ON HYDROCARBON MIGRATION AND ACCUMULATION IN THE CONTINENTAL MARGINAL BASIN GROUP OF THE NORTHERN SOUTH CHINA SEA
摘要
Abstract
The northern continental marginal basin group of the Southern China Sea, which includes the Yinggehai Basin, the Beibuwan Basin, the Qiongdongnan Basin, the Pearl River Mouth Basin and the Taixi'nan Basin, are located in a very complex geological setting. The formation and evolution of these basins are closely related to the surrounding geological processes. This paper reconstructed the paleo-geo-graphical framework of some key time boundaries since 55 Ma, based on which simply discussion was paid to the migration and accumulation of oil and gas in the area. Following conclusions are reached. (1) The interaction among the Pacific Plate, the Eurasia Plate and the India-Australia Plate affects the formation, migration and accumulation of hydrocarbon in this area. (2) Source rocks are gradually getting younger, as the source rocks and the Mohos are getting deeper from west to east in the Pearl River Mouth Basin, Qiongdongnan Basin and Yinggehai Basin. At the same time, heat flows as well as the potentials of hydrocarbon generation increased. Similar trend of mantle depths are observed in the Beibuwan Basin, the Pearl River Mouth Basin and the Qiongdongnan Basin from north to south. (3) Oil and gas are enriched in the Yinggehai Basin, Qiongdongnan Basin and southern Perl River Mouth Basin while the geological activities are weak, the subsidence is small and the crust is thin ( the Moho depths are less than 24km) so that the geothermal gradients and the heat flows are high in this region. Such conditions can keep the organic matters remained mature or over-mature, which are favorable for the formation of gas source rocks. (4) The hydrocarbon in the Qiongdongnan Basin and the Pearl River Mouth Basin is more prospective than that in the other basins. Especially, the Qiongdongnan Basin and the southern Pearl River Mouth Basin are likely to be the important gas producing area while the northern Pearl River Mouth Basin bears higher oil producing potential.关键词
盆地群/海陆格局重建/构造过程/油气运聚/南海北部Key words
the Northern South China Sea/ Basin Group/ Paleo-geographical Reconstruction/ Geological Process/ Hydrocarbon Migration and Accumulation分类
海洋科学引用本文复制引用
王洪才,李三忠,刘鑫,索艳慧,戴黎明,程世秀,许立青..南海北部陆缘盆地群新生代构造过程与油气运聚规律[J].海洋地质与第四纪地质,2013,33(1):73-82,10.基金项目
国家自然科学基金项目(41072152) （41072152）
海洋"863"重点项目(2009AA093401) （2009AA093401）
