Frequency distribution of sum of methane homologs in deposits of different types, from analyses and classification of 3,500 worldwide reservoired gases (after Nikonov, 1971)

Predictions of Oil or Gas Potential by Near-Surface Geochemistry

V.T. Jones and R.J. Drozd The American Association of Petroleum Geologists Bulletin V.67, No. 6 (June 1983), P.932-952

Figure 4. Frequency distribution of sum of methane homologs in deposits of different types, from analyses and classification of 3,500 worldwide reservoired gases (after Nikonov, 1971)