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南祁连盆地木里凹陷侏罗系烃源岩沉积环境与生烃潜力
The evaluation of the hydrocarbon generation potential of source rocks in Muli depression of southern Qilian basin
【摘要】 南祁连盆地木里凹陷侏罗系发育多层暗色泥岩,从有机质丰度、有机质类型、有机质成熟度等3方面对DK-3井烃源岩进行评价表明,其有机质丰度相对较高,有机质类型为Ⅱ1(腐殖-腐泥型)~Ⅱ2(腐泥-腐殖型)型,烃源岩整体处于成熟热演化阶段;烃源岩生烃潜力最高的层段为深度140~350 m内的黑色湖相泥岩,其有机质丰度高,类型好,且已达到成熟阶段;其次为深度630~720 m内的灰色泥岩夹层;其他层段烃源岩有机质丰度整体偏低,生烃潜力有限。
【Abstract】 Multilayer dark mudstone is developed in Jurassic strata of the Muli depression within southern Qilian basin. The evaluation of the source rock of Well DK-3 in the aspects of organic matter abundance,organic matter type, and organic matter maturity indicates that organic matter is abundant, organic matter type is Ⅱ1-Ⅱ2, and organic matter maturity is high. The highest hydrocarbon generation potential layer of the source rock is developed in the depth of 140-350 m, which is black deep lacustrine facies mudstone. The relatively high hydrocarbon generation potential layer is developed in the depth of 630-720 m, which is gray mudstone interlayer from the meandering river. Other layers are low in organic matter abundance and have low hydrocarbon generation potential.
【Key words】 Muli depression; Jurassic strata; source rock; hydrocarbon generation potential;
- 【文献出处】 中国地质 ,Geology in China , 编辑部邮箱 ,2014年01期
- 【分类号】P618.13
- 【被引频次】15
- 【下载频次】342