Combination of Methyl from Methane Early Cracking: A Possible Mechanism for Carbon Isotopic Reversal of Overmature Natural Gas

<div>Concentration variation of hydrocarbon gases and H2 with increasing temperature. (a) Variation in CH4 content with increasing pyrolysis temperature. (b) Variation in C2H6, C3H8, and H2 contents with increasing pyrolysis temperature. (c) Variation in C2H4, C3H6, and C4H10 contents with increasing pyrolysis.</div>

Geofluids

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Figure 2

Figure 2: Combination of Methyl from Methane Early Cracking: A Possible Mechanism for Carbon Isotopic Reversal of Overmature Natural Gas 