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柴北缘侏罗系烃源岩地球化学特征及其综合评价

, PP. 464-469

Keywords: 柴北缘,侏罗系,烃源岩,地化特征,生烃评价

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Abstract:

通过对柴达木盆地北缘侏罗系烃源岩有机质丰度及其类型的研究,以及对柴北缘烃源岩成熟度和柴北缘热演化史的分析,综合评价了烃源岩的生烃潜力。主要结论是:①柴北缘主要烃源岩下侏罗统暗色深水湖相泥岩和下侏罗统的煤岩,可分为Ⅱ、Ⅲ1和Ⅲ2型;②中、下侏罗统烃源岩大多数已超过成熟阶段。下侏罗统在E3-N2时期进入生排烃高峰期,中侏罗统则在N2进入生排烃阶段;③柴北缘下侏罗统为一套好的烃源岩,生气强度达到大中型油气田的规模。中侏罗统为一套中等的源岩层,生气强度中等,具备形成大中型气田的气源条件。

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