惠州凹陷典型油气聚集带成藏模式

Reservoir-forming Pattern of Typical Hydrocarbon Accumulation Zone in Huizhou Sag

基于地质、地震、地化等资料,采用流体包裹体分析测试技术,研究惠州凹陷典型油气聚集带的油气富集规律,建立相应的成藏模式。结果表明,文昌组烃源岩是研究区油气的主要贡献者,恩平组烃源岩之油源供给仅限于凹陷内局部区域,油气沿断层短距离垂向运移或沿复合输导体系垂向—侧向长距离运移,经历了两次大规模成藏,据此将惠西—流花油气聚集带的油气成藏模式划分为4种类型:单源—近距离—垂向运移—多期成藏模式、混源—近距离—垂向运移—多期成藏模式、混源—近距离—垂向—侧向运移—多期成藏模式、单源—远距离—垂向—侧向运移—一期成藏模式;惠陆油气聚集带油气成藏模式为单源—近距离—垂向运移—多期幕式快速成藏模式。

Based on geological,seismic and geochemical data,by means of fluid inclusion microfluorometric and thermodetecting techniques,this paper focuses on the study of reservoir-forming patterns and enrichment regulation of typical hydrocarbon accumulation zone in Huizhou Sag.The results show that oil from Wenchang source rock distributes widely in Huizhou Sag,hydrocarbon migrating vertically through faults or vertically then laterally through compound transport system,which experienced two accumulation periods,so the reservoir-forming patterns of Huixi—Liuhua accumulation zone can be divided into single source–short distance–migrated vertically–multi–phase pattern,mixed source–short distance–migrated vertically– multi–phase pattern,mixed source–short distance–migrated vertically and laterally–multi–phase pattern,single source–far distance–migrated vertically and laterally–one–phase pattern.And reservoir forming pattern of Huizhou—Lufeng accumulation zone is single source–short distance–migrated vertically–multi–phase episodic pattern.