石油实验地质Issue(2)：238-244,7.DOI:10.11781/sysydz201402238
涠西南凹陷烃源岩地球化学特征及油源对比
Geochemical characteristics of source rocks and oil-source correlation in Weixinan Sag, Beibuwan Basin
摘要
Abstract
The geochemical analysis of source rocks from the Liushagang and Weizhou Formations has indicated that, source rocks of the Liushagang Formation have higher hydrocarbon generation potential than those of the Weizhou Formation and the 2nd member of the Liushagang Formation ( L2) has the highest quality. The Liushagang and Weizhou rocks deposited in a weakly-reducing to weakly-oxidizing environment, remaining in the lack of gamma-cerane, and the content of C24 tetracyclic terpane reflects that the origins of organic matter account for certain percentage of terrestrial plants. C27 , C28 and C29αααR regular steranes distribute in“V” and anti-“L” shapes in each formation. Moreover, the rich abundance of C30-4-methylsteranes appears in the L2 source rocks. Oil sam-ples can be divided into 3 types based on the characteristics of biomarkers. TypeⅠoils were mainly derived from the 1st member of the Liushagang Formation. Type Ⅱ oils mainly originated from the 3rd member of the Liu-shagang Formation. TypeⅢoils are divided into 2 groups. GroupsⅢ1 oils showed a close relation to the mudstones or oil shales in L2. GroupⅢ2 oils were mainly from mixed sources and largely from L2. Oils from the Weizhou Formation present no correlation with the Weizhou Formation source rocks, maybe from the lower formations.关键词
地球化学特征/生物标志物/油源对比/涠西南凹陷/北部湾盆地Key words
geochemical characteristics/biomarkers/oil-source correlation/Weixinan Sag/Beibuwan Basin分类
能源科技引用本文复制引用
范蕊,李水福,何生,王晓龙,胡守志,张冬梅..涠西南凹陷烃源岩地球化学特征及油源对比[J].石油实验地质,2014,(2):238-244,7.基金项目
国家自然科学基金（41273052）、国家青年自然科学基金（40902037）和中海油前瞻性项目“中国近海新生代盆地优质烃源岩形成机理与分布规律”联合资助。 （）
