羌塘盆地拉雄错地区上二叠统热觉茶卡组烃源岩地球化学特征及油气潜力分析  

Geochemical characteristics and oil-gas potential analysis of source rock of Upper Permian Rejuechaka Formation in Laxiongcuo area, Qiangtang Basin

作　　者：欧阳慧子[1] 杨文光[1] 解龙[1] 陶刚[1] 李超[1] 何碧[1] 李超 OUYANG Huizi;YANG Wenguang;XIE Long;TAO Gang;LI Chao;HE Bi(Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, Sichuan, China)

机构地区：[1]成都理工大学沉积地质研究院,四川成都610059

出　　处：《中国地质》2017年第1期61-74,共14页Geology in China

基　　金：中国地质调查局项目(GZH201400301;12120113033004;121201010000150014)资助~~

摘　　要：羌塘盆地上二叠统热觉茶卡组烃源岩主要为一套深灰色—灰黑色薄层—极薄层泥岩,通过有机地球化学特征分析,结果表明:该套烃源岩的有机碳含量为0.31%~0.72%,并以差—中等烃源岩居多,有机质类型主要为II2型,有机质母质形成于具有一定盐度的还原环境,主要来源于海相浮游类和菌藻类等低等水生生物,并伴有一定量高等植物的输入,有机质热演化程度已达到高成熟阶段。羌塘盆地上二叠统热觉茶卡组烃源岩的发现进一步证实了古生界烃源岩具有良好的生烃潜力,为羌塘盆地油气资源评价提供了基础地质资料。The source rock of Upper Permian Rejuechaka Formation in Laxiongcuo area of Qiangtang Basin is characterized by dark gray?ash black and thin?very thin layers.An analysis of organic matter shows that total organic carbon content varies between0.31%and0.72%in the source rock,mainly reaching a poor-medium standard.The organic matter mainly belongs to II2type.Parent material of the organic matter was derived from a reducing environment with considerable salinity,and mainly came from plankton,algae,pilze with the mixture of a small amount of higher plants.The thermal evolution degree reaches high maturity stage.The discovery of the source rock further suggests that Paleozoic source rock has good hydrocarbon generating potential.The result obtained by the authors provides basic geological information for the assessment of oil and gas resources in Qiangtang Basin.

关 键 词：羌塘盆地 拉雄错 上二叠统 烃源岩 地球化学 

分 类 号：P618.13[天文地球—矿床学]