地质学报2012，Vol.86Issue(4)：641-650,10.
琼东南盆地中央峡谷沉积充填特征及油气地质意义
Filling Characters of Central Submarine Canyon of Qiongdongnan Basin and Its Significance of Petroleum Geology
摘要
Abstract
The morphology, sedimentary filling and petroleum geology of the central submarine canyon in the Qiongdongnan basin were studied using cores, logging, seismic, assaying data and paleontology data. Results show that the canyon, which is located at the central depression of Qiongdongnan basin, starts from the continental slope of Yinggehai basin and terminates at secondary basin in northwestern South Sea. The northeast-trending canyon with S shape in plane and V or U shape in cross-section is ca 580 km long, 1～3 km wide at bottom, 6～15 km wide at top, and 400～600 m deep. The canyon is filled by multi-period sandstone and mudstone which are superimposed each other in the manner of retrogressive accumulation, and lithology of the canyon is dominated by turbidite sandstone at the middle and lower parts and gradually transites from turbidite sandstone to distal turbidites and deep sea mudstone. Sedimentary system of the canyon can be classified into three microfacies: central, marginal and overflowing facies. It has experienced evolution stages of incision, tuibidite sandtone filling and mudstone filling. The canyon, which is not only channel of fragmentary material, but also place for hydrocarbon migration and accumulation, might host the hidden lithologic and structure-lithologic reservoirs.关键词
浊流沉积/充填特征/沉积微相/油气地质/中央峡谷/琼东南盆地Key words
turbidite deposit/ filling character/ sedimentary microfacies/ petroleum geology/ central submarine canyon/ Qiongdongnan basin引用本文复制引用
许怀智,蔡东升,孙志鹏,黄安敏,陈嵘,李春雷,何丽娟..琼东南盆地中央峡谷沉积充填特征及油气地质意义[J].地质学报,2012,86(4):641-650,10.基金项目
本文为国家科技重大专项大型油气田及煤层气开发项目(编号2011ZX05025-002)资助成果. （编号2011ZX05025-002）
