中南大学学报（自然科学版）2017，Vol.48Issue(3)：742-750,9.DOI:10.11817/j.issn.1672-7207.2017.03.024
东海盆地西湖凹陷平湖构造带超压系统与油气成藏
Overpressure and hydrocarbon accumulation in Pinghu structural belt in Xihu Depression, East China Sea
摘要
Abstract
The relationship between overpressure and hydrocarbon accumulation was investigated using fluid inclusions, basin simulation and organic geochemistry. The results show that oil-gas in Pinghu structural belt is mainly derived from coal-measure source rocks in Pinghu formation. The main oil-gas accumulation occurred in late stage which is approximately consistent with the forming time of overpressure resulted by hydrocarbon generation. Besides, oil-gas pools are distributed near top overpressured surface. Overpressure is closely linked to hydrocarbon accumulation. The thermal anomaly from vitrinite reflectance, geotemperature gradient and homogenization temperatures of fluid inclusion, abnormal fluid pressure from physical property of reservoir, fluid inclusion with non-homogeneous capture and gas chimney, and abnormal components from light hydrocarbon indicate that efficient rapid fluid flow is controlled by overpressure. The discharging of high-pressure fluids induces opening of faults and provides power of fluid migration.关键词
油气成藏/超压/流体流动/西湖凹陷/流体包裹体Key words
hydrocarbon accumulation/overpressure/fluid flow/Xihu depression/fluid inclusion分类
能源科技引用本文复制引用
苏奥,杜江民,贺聪,余雁,王存武,罗金洋..东海盆地西湖凹陷平湖构造带超压系统与油气成藏[J].中南大学学报（自然科学版）,2017,48(3):742-750,9.基金项目
国家重大科技专项(2011ZX05023-004-010) (Project(2011ZX05023-004-010) supported by the National Major Project of Science and Technology) （2011ZX05023-004-010）
