Identification of the four rearranged hopane series in geological bodies and their geochemical significances  

作　　者：Honglei Li Lian Jiang Xiaohui Chen Min Zhang 

机构地区：[1]Key Laboratory of Exploration Technology for Oil and Gas Research (Yangtze University), Ministry of Education [2]School of Earth Environment and Water Resources, Yangtze University

出　　处：《Chinese Journal Of Geochemistry》2015年第4期550-557,共8页中国地球化学学报

基　　金：financially supported by the National Natural Science Foundation of China (Grant No. 41272170);Nature Science Foundation of Hubei Province (Grant No. 2013CFB97)

摘　　要：Saturated fractions in a total of 23 oil samples and hydrocarbon source rocks from the Songliao, Tarim,and Ordos Basins have been analyzed by GC–MS and GC–MS–MS. According to the relative retention, mass spectral characteristics, and comparison with existing literature, a complete carbon number distribution ranging from C27 to C35(without C28) in the 17a(H)-diahopane series and early-eluting rearranged hopane series is identified. Compounds in the 18a(H)-neohopane series(Ts and C29Ts) and21-methyl-28-nor-hopane series(29Nsp and 30Nsp) are also noted. These four series of rearranged hopanes seem to occur in both brackish-saline lacustrine and coal measure environments. However, the coal measure and swamp environments being under an oxic condition, compared with brackish-saline lacustrines, are presumably more helpful to the formation of 30 E. Diversity in the content and distribution patterns indicate that rearranged hopanes could serve as good indicators of organic facies, depositional environment and maturity in petroleum geology.Saturated fractions in a total of 23 oil samples and hydrocarbon source rocks from the Songliao, Tarim,and Ordos Basins have been analyzed by GC–MS and GC–MS–MS. According to the relative retention, mass spectral characteristics, and comparison with existing literature, a complete carbon number distribution ranging from C27 to C35（without C28） in the 17a（H）-diahopane series and early-eluting rearranged hopane series is identified. Compounds in the 18a（H）-neohopane series（Ts and C29Ts） and21-methyl-28-nor-hopane series（29Nsp and 30Nsp） are also noted. These four series of rearranged hopanes seem to occur in both brackish-saline lacustrine and coal measure environments. However, the coal measure and swamp environments being under an oxic condition, compared with brackish-saline lacustrines, are presumably more helpful to the formation of 30 E. Diversity in the content and distribution patterns indicate that rearranged hopanes could serve as good indicators of organic facies, depositional environment and maturity in petroleum geology.

关 键 词：重排藿烷 地球化学意义 地质体 识别 鄂尔多斯盆地 沼泽环境 类化合物 塔里木盆地 

分 类 号：P618.13[天文地球—矿床学]