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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 61 (1977)

Issue: 12. (December)

First Page: 2103

Last Page: 2114

Title: Hydrocarbon Geochemistry of Oils from Maranon Basin, Peru

Author(s): H. A. Illich, F. R. Haney, T. J. Jackson (2)


Fifteen oils from the Maranon basin, Peru, were chemically analyzed to ascertain possible genetic interrelations. Correlation of the oils was achieved by use of normal paraffin and isoprenoid-type hydrocarbon compositions. The oils were analyzed using the whole oil as received from the field. Two major oil types were observed--one containing abundant normal paraffins, the other minor normal paraffins (naphthenic). Using isoprenoid ratios, it was concluded that the two major oil types most probably are cogenetic with respect to source chemistry. The observed compositional differences are interpreted to be independent of source control. The paraffinic type 1 oils are interpreted to represent most closely the parent composition. The naphthenic type 2 oils are interpreted to e degradation products of type 1 oils.

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