高邮凹陷南断阶许庄地区阜宁组原油油源分析

Oil sources analysis of Funing Formation in the south fault zone of Gaoyou Sag in Xuzhuang area

研究区位于高邮凹陷南部断阶带中部,该区油源充足,多期断裂发育,油气运移畅通,纵向上发育多套储盖组合,成藏条件十分优越,但油源问题一直以来存在争议。通过对许庄地区阜宁组原油饱和烃气相色谱特征、饱和烃生物标志物特征、烃类流体包裹体成分等综合分析研究,结果表明研究区原油主要来源于邵伯次凹、樊川次凹阜四段成熟烃源岩以及本地阜二段成熟烃源岩。

The study area is located in the centre area of the south fault belt of Gaoyou Depression. In the study area, there are sufficient oil sources, developmental multi - stage faults, smooth oil - gas migration, several sets of reservoir cap assemblage developed in vertical direction, and favorable reservoir forming conditions, but the oil source problem has been controversial. It was integrally studied on the characteristics of gas chromatogram of saturated hydrocarbon and saturated hydrocarbon biomarkers, and hydrocarbon fluid inclusions of Funing Formation in Xuzhuang area. Research results show that the main source of crude oil in study area comes from the E1f4 mature hydrocarbon source rocks of Shaobo and Fan- chuan Concave and the local E1f2 mature source rocks.