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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

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【作者】 龚文强张永生宋天锐曾艳涛郭守波

【Author】 GONG Wen-qiang;ZHANG Yong-sheng;SONG Tian-rui;ZENG Yan-tao;GUO Shou-bo;Institute of Mineral Resources,Chinese Academy of Geological Sciences;Gold Headquarters Training Corps;Institute of Geology,Chinese Academy of Geological Sciences;Department of Geochemistry, Yangtze University;Baikouquan Oil Production Plant,Xinjiang Oilfield Company;

【机构】 中国地质科学院矿产资源研究所黄金指挥部教导大队中国地质科学院地质研究所长江大学地球化学系新疆油田公司百口泉采油厂

【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.

【基金】 中国地质调查局工作项目(1212010818055)资助
  • 【分类号】P618.13
  • 【被引频次】15
  • 【下载频次】342
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