天然气工业2009，Vol.29Issue(11)：9-12,4.DOI:10.3787/j.issn.1000-0976.2009.11.003
珠江口盆地与莺琼盆地油气运聚特征的差异性
Differences in hydrocarbon migration and accumulation between the Pearl River Mouth and the Yinggehai-Qiongdongnan basins on the northern margin of South China Sea
摘要
Abstract
The existing petroleum exploration results reveal that the eastern and western segments of the northern margin of the South China Sea are significantly different in the characteristics of hydrocarbon migration and accumulation. Based on sum-marizing the previous achievements and understandings, we analyzed the differences in the patterns of hydrocarbon migration and accumulation between the eastern part represented by the Pearl River Mouth Basin and and the western part by the Yingge-hai-Qiongdongnan (Yingqiong) Basin. In the eastern part, hydrocarbons migrate both vertically and laterally under the joint driving of hydrodynamic force and buoyancy, and the activity of late faults plays a key role in hydrocarbon migration and accu- mulation. While in the western part, hydrocarbons migrate vertically along diapire zone (the main pathway) and laterally along the unconformities and sandstone carrier beds mainly under the driving of high-pressure active fluids. The diapires and late fault activity play a key role in gas accumulation and migration respectively. A comparative analysis of the differences in hydrocarbon migration and accumulation, in combination with the study of the sedimentary features and tectonic movement, reveals that the difference in environments is the main cause. The eastern part has normal pressure as because the NW-trending transtensional faults resulted from the Dongsha movement can release the overpressure. In contrast, the western part shows overpressure due to the weak influences of the Dongsha movement.关键词
南海北部陆缘/油气运聚/特征/成藏规律/珠江口盆地/莺琼盆地/超压环境/差异Key words
northern margin of South China Sea/hydrocarbon migration/hydrocarbon pooling pattern/Pearl River Mouth Basin/Yinggehai-Qiongdongnan Basin/overpressure environment,difference分类
天文与地球科学引用本文复制引用
蔡周荣,夏斌,万志峰,刘维亮..珠江口盆地与莺琼盆地油气运聚特征的差异性[J].天然气工业,2009,29(11):9-12,4.基金项目
本文受到国家重点基础研究发展计划(973计划)课题"南海深水区盆地形成机理与演化过程研究"(编号:2009CB219401)的资助. （973计划）
