| Citation: | Chun Liu, Shijia Chen, Jilong Zhao, Zhou Su, Hui Rong. Geochemical Characteristics and Origin of Crude Oil and Natural Gas in the Southern Slope Zone, Kuqa Foreland Basin, NW China. Journal of Earth Science, 2022, 33(3): 820-830. doi: 10.1007/s12583-021-1412-4
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Continuous exploration has triggered a heated debate on hydrocarbon resource potential in the southern slope zone of the Kuqa foreland basin, and sources of the Mesozoic–Cenozoic oil and gas have become a key problem to be solved in this region. Composition and organic geochemical parameters of crude oil and natural gas from the southern slope zone of the Kuqa foreland basin were illustrated in order to reveal their origin by using a combination of gas chromatograph (GC), gas chromatogram-mass spectrum (GC-MS) and carbon isotope analyses. The characteristics of crude oil, such as low density, viscosity, solidification point and sulfur content, and high wax content, indicate that source of the crude oil is continental. The biomarker compositions of crude oil are characterized by low to medium molecular weight compounds (
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