吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (4): 970-981.doi: 10.13278/j.cnki.jjuese.20180148
牛海青1, 韩小锋2, 肖波3, 魏建设2, 张慧元2, 王宝文2
Niu Haiqing1, Han Xiaofeng2, Xiao Bo3, Wei Jianshe2, Zhang Huiyuan2, Wang Baowen2
摘要: 甘肃-内蒙古交界处的北山盆地群侏罗系是我国西北地区潜在的油气勘探新领域。为加深对该盆地群资源潜力的认识,以有机地球化学分析数据为基础,探讨了其中煤系烃源岩的沉积环境、有机质来源,建立了该烃源岩生烃潜力评价标准。研究结果表明,中口子盆地侏罗系烃源岩干酪根类型以Ⅱ1-Ⅱ2型为主,生烃母质主要是陆生植物,含少量的藻类和水生生物,主要形成于三角洲平原沼泽或湖侵期的间湾湖泊等氧气量适中的弱氧化-弱还原沉积环境。生烃潜量和氢指数是衡量煤系源岩有机质丰度、生烃潜力和生油潜力最有效的指标,根据生烃潜力评价标准:黑帐房凹陷侏罗系暗色泥岩多属于中-差烃源岩,南泉凹陷暗色泥岩生烃潜力级别优于黑帐房凹陷,主要为中-好烃源岩;南泉凹陷炭质泥岩大多数属于中等-好油源岩,煤岩大多属于差油源岩。
中图分类号:
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