福建连江川石岛油苗地球化学特征及油源分析探讨  

Geochemical Characteristics and Genesis of Oil Seepage in Chuanshi Island of Lianjiang County,Fujian Province

作　　者：李翠翠 Li Cuicui(Fujian Institute of Geological Survey,Fuzhou,350013)

机构地区：[1]福建省地质调查研究院,福州350013

出　　处：《福建地质》2024年第2期142-148,共7页Geology of Fujian

基　　金：福建省自然资源厅项目“福建省中生代盆地油气资源潜力分析”。

摘　　要：运用族组分、饱和烃色谱、色质等技术,对连江川石岛油苗进行了地球化学特征研究和油源分析,并与小溪组一段暗色泥岩进行了油源对比。研究表明,川石岛油苗沥青的源岩形成于弱还原的沉积环境,有机质类型较差,处于成熟演化阶段,与附近小溪组潜在烃源岩没有明显的亲缘关系,推测油苗可能来自现场小溪组暗色泥岩上部岩层内的小规模油气藏,或是来自台湾海峡深部新生界的油气藏。This article uses techniques such as group composition,saturated hydrocarbon chromatography,and color quality to study the geochemical characteristics and oil source analysis of the Chuanshidao oil seepage,and compares the oil source with the dark mudstone of the Xiaoxi Formation.Research has shown that the source rock of Chuanshi Island oil seepage asphalt was formed in a weakly reducing sedimentary environment,with poor organic matter types and in a mature evolution stage.It is not significantly related to the potential source rock of the nearby Xiaoxi Formation.It is speculated that the oil seepage may come from a small-scale oil and gas reservoir in the upper layer of a dark mudstone in the Xiaoxi Formation on site,or from a deep Cenozoic oil and gas reservoir in the Taiwan Strait.

关 键 词：川石岛 油苗 沥青 地球化学特征 小溪组 福建连江 

分 类 号：P618.13[天文地球—矿床学]