塔河油田稠油中25-降苯并藿烷的检出及其意义  

Identification of 25-norbenzohopanes in Tahe Oilfield and its geological significance

作　　者：李敏[1] 田辉[2] 肖贤明[2] 张水昌[3] 相明辉[1] 盖海峰[2] 程鹏[2] 傅家谟[1,2] 

机构地区：[1]上海大学环境与化学工程学院,上海200444 [2]中国科学院广州地球化学研究所有机地球化学国家重点实验室,广东广州510640 [3]中国石油勘探开发研究院,北京100083

出　　处：《地球化学》2014年第5期453-459,共7页Geochimica

基　　金："十二五"国家科技重大专项课题(2011ZX05008-002-40)

摘　　要：与苯并藿烷相比,25-降苯并藿烷的研究较少,目前这类化合物仅检出于加拿大和我国川西北的降解沥青中。本研究在塔河油田井下奥陶系储层稠油中检测到了完整系列的25-降苯并藿烷(C31–C34),发现25-降苯并藿烷与苯并藿烷的比值与现有的生物降解评价参数有较好的可比性,且该参数在不同降解程度原油中的差别比其他参数更大,故今后有必要对其开展更深入的研究,以便更精细地评价原油的生物降解程度。Compared to extensive investigation of benzohopanes, the occurrences of 25-norbenzohopanes were only reported in biodegraded bitumens of Canada and NW Sichuan Basin. In this study we identified the complete series of 25-norbenzohopane （C31-C34） in severely biodegraded oils from the Ordovician reservoirs in Tahe Oilfield and found that the ratios of 25-norbenzohopane to corresponding benzohopane are well correlated to other parameters reflecting biodegradation extent. In addition the new ratio parameter is more sensitive than others and therefore it is necessary to further evaluate this new parameter in future studies to obtain more detailed information on biodegradation extent.

关 键 词：苯并藿烷 25-降苯并藿烷 生物降解 塔河油田 

分 类 号：P593[天文地球—地球化学]