渤海海域中西部地区气藏伴生油地球化学特征和油源研究.PDF

# # Bu lletin of M ineralogy , Pet rology and Geoch emis t ry V ol. 25 No . 3, July 2006 陈 丹, 文志刚, 唐友军, 宋换新, 李浮萍 , 434 02 3 通过碳同位素与色谱质谱分析, 探讨了渤海海 中西部地区气藏伴生油的碳同位素与生物标志物地球化学特征, 依 据4- 甲基甾烷和伽马蜡烷含量, 将气藏伴生油分为3 类, 再结合源岩的地球化学特征, 对气藏伴生油进行了油源研究研究 表明, 气藏伴生油多数属于高蜡油, 补身烷分布一致, 三环萜烷丰度较低, 甾烷组成具有较好的相似性, 但伽马蜡烷4- 甲基甾 烷分布有差异油源对比结果表明, 气藏伴生油主要来源于沙河街组烃源岩, 东下段烃源岩也有贡献 渤海海 ; 中西部地区; 气藏伴生油; 生物标志物; 油源对比 P 6181 13 A 1007- 2 802( 200 6) 03- 0250- 04 Geochemistry and Source of Oil Associate with Gas Reservoirs in the Western Bohai Bay Basin CH EN Dan, WEN Zhi- gang, T A N G Yo u-jun , SON G H uan- x in, L I Fu- ping Geochemistry D ep ar tment, Yang tz e Univ er sity , H ubei 434023, China Abstract: T hrough carbon isotope and GC- M S an alyze, carbon isot ope and b iomarker s g eochem istry of oil associate w it h gas reservoir s h as been researched in th e w est ern of th e Bohai Bay Basin. T h en in term s of t he cont ent of 4- m eth yl st erane and gamm acerane, oil associat e w ith gas reservoir s is divided int o t hree t ypes; at th e sam e t im e, as- s ociat ed w it h geochem istry of source rock, th e source of t he oil associate w ith gas reservoir s has b een research ed. T he research indicat ed t hat oil associat e w ith gas reservoir s m ainly belongs t o high w ax oil, most of w hich th e dis- t ribu tion of drim ane and t he consisten t of st erane are sim ilarity , t he