石油实验地质2017，Vol.39Issue(3)：383-389,7.DOI:10.11781/sysydz201703383
渤海湾盆地青东凹陷古近系原油地球化学特征及油源分析
Geochemical characteristics and oil-source correlation of Paleogene oils in Qingdong Sag, Bohai Bay Basin
摘要
Abstract
Biodegraded oils have been discovered in the Qingdong Sag, Jiyang Depression, Bohai Bay Basin.On the basis of the geochemical characteristics of source rocks and crude oils, the less affected C29 hopane, is chosen to calculate biomarker parameters, including β-carotane/(2×C29hopanes), gammacerane/(2×C29hopanes).The tricyclic terpane parameters (2×C24tetracyclic terpane)/(C26 tricyclic terpanes), (2×C19)/(C28+C29) tricyclic terpanes and chrysene/phenanthrene, combined with 4-methylsteranes and carbon isotopes.Crude oils in the Qingdong Sag were divided into 4 types (Ⅰ, Ⅱ, Ⅲ, Ⅳ), while source rocks were divided into 3 types (A, B1, B2).Crude oils of type I derived from mature source rocks (type A) in the lower part of the third member of Shahejie Formation in the northern part of the sag.Crude oils of type Ⅱ were sourced from rocks (type B2) in the upper part of the fourth member of Shahejie Formation in the southern part of the sag.Crude oils of type Ⅲ were derived from type B1 source rocks in the upper part of the fourth member of Shahejie Formation in the central and northern parts of the sag.Crude oils of type Ⅳ were sourced from rocks in the upper part of the fourth member of Shahejie Formation in the Qingnan Sag.Oils in well QD-8 partially originated from source rocks in the southern part of the Qingdong Sag.关键词
生物降解油/生物标志物/油源对比/青东凹陷/济阳坳陷/渤海湾盆地Key words
biodegraded oils/biomarker/oil-source correlation/Qingdong Sag/Jiyang Depression/Bohai Bay Basin分类
能源科技引用本文复制引用
葛海霞,张枝焕,闵伟..渤海湾盆地青东凹陷古近系原油地球化学特征及油源分析[J].石油实验地质,2017,39(3):383-389,7.基金项目
国家科技重大专项项目(2016ZX05049-006-08HZ)资助. （2016ZX05049-006-08HZ）
