青藏高原沱沱河盆地古近系雅西措群烃源岩评价  

Evaluation of source rocks in Paleogene Yaxicuo Group of Tuotuohe basin in the Qinghai-Tibet Plateau,China

作　　者：向芳[1] 李志宏[1] 伊海生[1] 

机构地区：[1]成都理工大学沉积地质研究院,成都610059

出　　处：《成都理工大学学报（自然科学版）》2009年第3期238-242,共5页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家重点基础研究发展计划(973)项目(2006CB701401-03)

摘　　要：在青藏高原沱沱河盆地中的雅西措群典型实测剖面基础上,通过对烃源岩相关样品有机质丰度、有机质类型、有机质热演化程度等测试结果进行统计分析,结果表明雅西措群烃源岩的有机质丰度中等,有机碳平均质量分数为0.27%,有机质类型为Ⅱ1-Ⅱ2,有机质热演化程度不高,属于未成熟-低成熟阶段,总体评价为中等烃源岩。将该结果与类似的伦坡拉盆地相应层位烃源岩对比后发现,沱沱河盆地虽具有一定的勘探前景,但其前景不如伦坡拉盆地。Based on the actual measured result of the typical section of Paleogene Yaxicuo Group in the Tuotuohe basin （an important part of the Qinghai-Tibet Plateau）, this paper analyses and researches the organic matter abundance of the source rocks of this group as well as their organic matter type and organic matter maturity. The result shows that the source rocks are characterized by medium abundance of organic matter, the mass fraction average of organic carbon is 0.27%, the organic type is Ⅱ1-Ⅱ2 and the organic matter maturity is on the stage of immaturity or low maturity. As a whole assessment, the source rocks are medium. Through comparing of the source rocks of the Yaxicuo Group with the corresponding layers of the Lunpola basin, this research result indicates that this group has certain exploration prospects, but not so good prospect as the Lunpola basin.

关 键 词：青藏高原 沱沱河盆地 雅西措群 岩石学 烃源岩 

分 类 号：TE122.115[石油与天然气工程—油气勘探]