Geofluids / 2019 / Article / Fig 4

Research Article

Carbon and Hydrogen Isotopic Reversals in Highly Mature Coal-Derived Gases: A Case Study of Paleozoic Gases in the Southern Ordos Basin, China

Figure 4

(a) Plot of δD-CH4 versus δ13C-CH4; (b) hydrogen isotopic series of alkanes in lower and upper Paleozoic gases of South Jingbian and Yan’an gas fields (all gases show hydrogen isotopic reversal with δD-CH4>δD-C2H6); (c) hydrogen isotopic series of alkane gases in Sulige, Daniudi, and Shenmu gas fields (with positive hydrogen isotopic series).
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