Geochemical characteristics of Upper Triassic source rocks from typical sections in Qiangtang Basin, northern Tibet

Abstract: According to the outcrop samples and analytical data of Upper Triassic source rocks from Qiangtang Basin, the authors evaluated the hydrocarbon generation capacity based on the abundance of organic matter, the type of organic matter and maturity of organic matter. The result reveals that the abundance of organic matter is high in Woruoshan section and Zanalongba section, and the rocks are medium-good source rocks, the type of the organic matter is Ⅱ2, the maturity is high and it mainly generates condensate and moisture. The abundance of organic matter is low in Duoseliangzi section and Xiaochaka section, and it has poor generation capacity, the type of organic matter is Ⅱ2, the maturity is over-maturity and it mainly generates dry gas. Overall, the Upper Triassic source rocks in Qiangtang Basin have good hydrocarbon generation capacity, especially in the depression area. The results achieved by the authors have important?significance?for?the future?exploration?in Qiangtang Basin.