Evaluation of Hhydrocarbon Source Rock of Dajialian Formation of Xiariha Depression in South Qilian Basin

The hydrocarbon source rock of the middle triassic dajialian formation carbonate rock widely distribute in South Qilian Basin of Xiariha Depression.Through the outcrop samples collected and used of organic carbon test,kerogen analysis,rock pyrolysis and gas chromatography of saturated hydrocarbon for indoor sample test,the authors discussed organic matter abundance,type and maturity of outcrop carbonate samples of dajialian formation in the study area.The results show that the organic matter abundance is medium,the organic matter type isⅡ2,and the organic matter maturity has reached mature to high mature stage.It is finally eveluated as poor-medium hydrocarbon source rock.