渤海湾盆地南堡凹陷原油地球化学特征及油源对比  

Geochemical characteristics of crude oil and oil-source correlation in Nanpu sag,Bohai Bay Basin

作　　者：梅玲[1] 张枝焕[1] 王旭东 杨永才[1] 刘洛夫[1] 赵彦德[1] 

机构地区：[1]中国石油大学石油天然气成藏机理教育部重点实验室,北京102249 [2]中石油冀东油田公司勘探开发研究院,河北唐山063004

出　　处：《中国石油大学学报（自然科学版）》2008年第6期40-46,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中国石油大学(北京)与冀东油田公司合作项目(JDYJ-2006-JS-0026)

摘　　要：在原油地球化学特征精细剖析和对比的基础上,划分了南堡凹陷原油的成因类型,并根据生物标志物组合特征对原油和烃源岩进行了对比研究。结果表明:不同构造带或同一构造带不同层位原油的地球化学特征均存在一定的差别,据此可将原油划分为6类,其中第Ⅰ类主要分布于柳赞油田和高尚堡油田、老爷庙油田浅层明化镇组和馆陶组油层,第Ⅱ类主要分布在高尚堡(高柳断层以南)、老爷庙和北堡油田东营组油层,第Ⅲ类主要分布在柳赞油田及高尚堡油田(高柳断层以北)沙河街组油层,第Ⅳ类主要分布于滩海区东一段油层,第Ⅴ、Ⅵ类主要分布在滩海区奥陶系油层中;古近系3套烃源岩对不同构造带的油气聚集有不同的贡献,其中高柳构造带高柳断层以北地区的原油主要来源于沙三段烃源岩,断层以南的主要来自于沙一段和东三段烃源岩,部分混有沙三段烃源岩的贡献,老爷庙和北堡构造的原油主要来源于东三段和沙一段烃源岩,混有部分沙三段烃源岩生成的原油,滩海区原油主要来自于沙一段和沙三段烃源岩。The types of crude oil formed in Nanpu sag were classified on the basis of delicate geochemical correlation. The correlation between crude oil and hydrocarbon source rocks was also researched by combined characteristics of biomarkers. It is shown that there are six types of the crude oils in Nanpu sag, which have different compositional characteristics. The type Ⅰ oil occurs in the Nm and Ng in Liuzan, Gaoshangpu and Laoyemiao Oilfield. The type Ⅱ oil occurs in Ed of Gaoshangpu, Laoyemiao and Beipu Oilfield. The type Ⅲ oil occurs in Liuzan Oilfield and Gaoshangpu Oilfield in the north of Gaoliu fault. The type Ⅳ oil occurs in Ed reservoir. And the type Ⅴ and Ⅵ oil occur in Ordovician reservoir. The results show that these three series of hydrocarbon source rocks have different contribution to different conformation. The oils of Liuzan Oilfield and part oil of Gaoshangpu Oilfield are mainly sourced from source rocks of Es3 in the north of Gaoliu fauh, others are derived from Es1 and Ed3, partly from Es3. The oils of Laoyemiao and Beipu Oilfield are mainly formed from Esl and Ed3, partly from Es3. The oils of beach area are mainly derived from Es1 and Es3.

关 键 词：原油 烃源岩 油-源对比 生物标志物 南堡凹陷 

分 类 号：TE132.4[石油与天然气工程—油气勘探]