Light Hydrocarbons for Petroleum and Gas Prospecting
V.T. Jones, III, M.D. Matthews and D.M. Richers
Geochemical Remote Sensing of the Subsurface.  Edited by M.Hale
Handbook of Exploration Geochemistry, Vol. 7 (G.J.S. Govett, Editor)
©1999 Elsevier Science B.V. All rights reserved
Preprint

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TABLE 5-IX

Composition (mole fractions of C₁-C₄) of typical reservoir types (Katz and Williams, 1952)

Reservoir type	Methane	Ethane	Propane	Butanes
Dry gas	0.91	0.05	0.03	0.01
High pressure gas	0.81	0.07	0.07	0.05
High pressure oil	0.77	0.08	0.08	0.07
Low pressure oil	0.37	0.21	0.21	0.21