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鄂尔多斯盆地安塞-富县地区延长组-延安组原油地球化学特征及油源对比

郭艳琴  李文厚  陈全红  曹红霞  张道锋 

摘 要:原油族组成、碳同位素、饱和烃气相色谱及萜烷、甾烷等生物标志化合物特征分析显示,鄂尔多斯盆地安塞-富县地区延长组-延安组原油地球化学特征相近,为低成熟-成熟原油.原油饱和烃含量在70%以上;碳同位素值偏轻,δ13C值一般小于-31‰;正构烷烃分布完整,呈单峰型,主峰碳为C17-C23.原油生物标志物特征是,五环萜烷含量高于三环萜烷,以C30-藿烷、C29-降藿烷为主,伽马蜡烷含量少;甾烷以C27-胆甾烷、C28-麦角甾烷及C29-谷甾烷为主,规则甾烷呈不对称"V"字型分布,C28-甾烷含量较低,C27-甾烷与C29-甾烷含量相近.原油和源岩的地球化学特征分析对比表明,长8-长4+5半深湖-深湖相腐泥-混合型泥岩是主要烃源岩.生物标志物特征显示原油具有一定的运移效应.
关键词:碳同位素;饱和烃气相色谱;生物标志物;油源对比;安塞-富县地区;鄂尔多斯盆地
分类号:TE125 文献标识码:A

文章编号:0253-9985(2006)02-0218-07

Geochemical behaviors of oil and oil -source correlation in Yanchang-Yan' an Formations in Ansai-Fuxian area, Ordos basin

Guo Yanqin  Li Wenhou  Chen Quanhong  Cao Hongxia  Zhang Daofeng 

 

基金项目:国家重点基础研究发展计划(973)项目(2003CB214602);长江学者和创新团队发展计划资助项目(IRT0559)
作者简介:郭艳琴(1972-),女,博士,沉积学及石油地质学
作者单位:郭艳琴(西北大学,地质学系,大陆动力学国家重点实验室,陕西,西安,710069) 
     李文厚(西北大学,地质学系,大陆动力学国家重点实验室,陕西,西安,710069) 
     陈全红(西北大学,地质学系,大陆动力学国家重点实验室,陕西,西安,710069) 
     曹红霞(西北大学,地质学系,大陆动力学国家重点实验室,陕西,西安,710069) 
     张道锋(西北大学,地质学系,大陆动力学国家重点实验室,陕西,西安,710069) 

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