Fig. 5

Relationship between gas dryness coefficient (C1/C1‒5) and carbon isotope composition of (a) methane (δ13C1) and (b) ethane (δ13C2) from coal-type gas in the Ordos Basin.
Relationship between gas dryness coefficient (C1/C1‒5) and carbon isotope composition of (a) methane (δ13C1) and (b) ethane (δ13C2) from coal-type gas in the Ordos Basin.