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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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鄂尔多斯盆地吴起—志丹地区长10烃源岩特征与生烃潜力
Keywords: 长10烃源岩,地球化学,生烃潜力,鄂尔多斯盆地
Abstract:
？鄂尔多斯盆地中部志丹—吴起地区延长组长10油层组顶部发育一套湖相暗色泥岩，确定该套烃源岩的地质地球化学特征及生烃潜力对该区油气勘探有重要意义。利用岩心和测井资料，研究了长10暗色泥岩的分布特征，通过开展岩石热解、干酪根显微组分、镜质体反射率、可溶有机质族组分及饱和烃色谱—质谱等有机地球化学测试和分析，评价了长10烃源岩的生烃潜力。研究表明，长10暗色泥岩分布广泛，厚度为5～20m；烃源岩有机质丰度和生烃转化率较高，有机质母质中陆源植物生源贡献较大，主要为ⅱ型和ⅲ型干酪根，有机质热演化程度达到成熟生油阶段，总体评价为较好—好烃源岩。长10烃源岩的生物标志化合物特征有别于长7烃源岩和长9烃源岩，具有高pr/ph值、ααα20r构型c27、c28和c29规则甾烷呈反“l”型分布的典型特征。长10烃源岩的生烃量较大，是鄂尔多斯盆地中生界另外一套重要的有效烃源岩，该套烃源岩的发现为鄂尔多斯盆地中部延长组下组合的深入勘探提供了科学依据。
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