大港滩海区中浅层油岩地球化学特征及油气来源分析——以唐家河油田为例  

Geochemical Characteristics and Origin of Oil and Its Source Rocks in the Shallow-Middle Level:A Case Study of Tangjiahe Oil Field

作　　者：高玉巧[1] 刘立[1] 廖前进[2] 孙晓明[2] 腾云[3] 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]大港油田勘探开发技术研究中心,天津300280 [3]河南石油勘探局地质录井公司,河南南阳473132

出　　处：《吉林大学学报（地球科学版）》2006年第4期535-542,共8页Journal of Jilin University：Earth Science Edition

基　　金：中石油科技攻关项目(200312技984)

摘　　要：通过唐家河油田中浅层各层系原油及滩海区所有层系烃源岩的碳同位素、色谱、色谱-质谱等地球化学分析,选取δ13C、合适的生物标志物参数,即G/C30H、O/C30H、Ts/Tm、ααR C27/C29、ααRC28/C29、C3122S/(S+R)、C2920S/(S+R)等进行油源综合对比。结果表明,唐家河油田中浅层各层系原油来源于深层沙三段及沙二段烃源岩,而沙一段和东营组的贡献不大。考虑到沙二段烃源岩厚度小,生油能力有限,唐家河油田沙三段烃源岩是最主要的油气来源。According to the geochemistry analyses such as carbon isotope, chromatogram and chromatogram-mass spectrum of crude oil from the main layers in shallow-middle level and their source rocks from all layers in Tangjiahe oil field, δ^13C and appropriate biological marker parameters, e.g. G/C30 H, O/C30H, Ts/Tm, ααR C27/C29, ααRC28/C29, C3122S/（S＋R）, C2920S/（S＋R） are chosen to correlate oil and its source rocks. It is indicated that crude oil in the layers of shallow-middle level is derived not from Member 1 of the Shahejie Formation and the Dongying Formation, but from Member 3 and Member 2 of Shahejie Formation in the deep level. In view of a little thickness and limited oil-forming potential of source rock of Member 2 of the Shahejie Formation, the source rock in Member 3 of the Shahejie Formation is considered as the main source of oil and gas.

关 键 词：油气来源 碳同位素 生物标志物 中浅层 唐家河油田 

分 类 号：P618.13[天文地球—矿床学]