石油实验地质Issue(1)：33-38,45,7.DOI:10.11781/sysydz201401033
沾化凹陷渤南洼陷沙河街组原油成因类型及分布特征
Genetic types and distribution characteristics of crude oils from Shahejie Formation in Bonan Subsag, Zhanhua Sag, Jiyang Depression
摘要
Abstract
According to the characteristics of saturated hydrocarbon chromatography, GS/MS and biomarker index, combined with the geochemical features of crude oil, the hydrocarbon genetic types and distribution laws of the Bonan Subsag in the Zhanhua Sag have been analyzed based on the comparison of geochemical features of source rocks from different layers of the Shahejie Formation. The research shows that there are 2 suits of hydrocarbon source rocks in the Bonan Subsag, the 3rd member and the 4th member of the Shahejie Formation. The source rocks in the 4th member of the Shahejie Formation can be further divided into evaporate and sub-evaporate ones. All of the source rocks are obviously different in gammacerane content, Pr/Ph ratio and maturity parameters. Oil source correlation indicates that there are 5 types of oil and they have certain laws in distribution. The crude oils of typesⅠandⅡin the 3rd member of the Shahejie Formation both originate from the source rocks in the 3rd member of the Shahejie Formation;however, they are obviously different in maturity and distribution. The crude oils of typeⅠin the 3rd member of the Shahejie Formation locate in the middle and upper sections of the 3rd member of the Shahejie Formation in the depression, with relatively lower maturity. The crude oils of typeⅡin the 3rd member of the Shahejie Formation locate in deeper formations, with relatively higher maturity. The crude oils of typeⅠin the 4th member of the Shahejie Formation distribute sporadically, and originate from the evaporate source rocks in the 4th member of the Shahejie Formation. The crude oils of typeⅡin the 4th member of the Shahejie Formation come from the sub-evaporate source rocks in the 4th member of the Shahejie Formation, and are mainly self-generated and self-reserved. Mixed oil and gas come from source rocks in both of the 3rd and 4th members, and locate far away from source center influenced by faults, mainly in step-fault zones.关键词
成因类型/油源对比/生物标志化合物/渤南洼陷/沾化凹陷Key words
genetic type/oil-source correlation/biomarker/Bonan Subsag/Zhanhua Sag分类
能源科技引用本文复制引用
宋国奇,刘华,蒋有录,谷国翠,刘雅利,卢浩..沾化凹陷渤南洼陷沙河街组原油成因类型及分布特征[J].石油实验地质,2014,(1):33-38,45,7.基金项目
国家科技重大专项（2011ZX05006-003）资助。 （）
