西藏羌塘盆地土门地区上三叠统烃源岩特征

aking Bolila formation of upper Triassic in Tumen area as research object, this paper operates statistical analysis in the organic geochemical data of hydrocarbon source rocks. Generally, hydrocarbon source rock organic matter is in high mature stage, the organic carbon content decreases with increasing maturity, tested TOC value is residual TOC. The abundance of organic matter indicated by TOC is obviously different from that indicated by chloroform asphalt "A" and hydrocarbon potentially. The organic matter isⅡ1－Ⅱ2 type based on sapropelitic group, stem from organic matter in situ production of marine environment under reducing conditions.