石油先駆物質としての抽出性非炭化水素有機物の続成変化

概要

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Non-hydrocarbons in extractable organic matter, of which few studies have been reported, from the Neogene Tertiary shales, crude oils and oil sand from Japanese oil field. Northeast Japan and Recent sediments from Pacific Ocean basins off Shikoku Island have been examined in order to obtain in formation on the evolution of those constituents under effect of burial from the stand point of petroleum genesis. Methanol-acetone-benzeneextract (MAB extract) and asphaltenes extracted from the powdered rock samples as non-hydrocarbons were subjected to elemental and infrared spectroscopic analyses respectively. The elemental analyses of those materials show a progressive decrease in the atomic H/C ratio of those constituents with burial. The infrared spectra obtained by KBr pellet technique also show distinct features of disappearence of carbonyl groups and aliphatic structures, and appearence or intensification of aromatic structures as a function of depth. These observations on diagenesis of non-hydrocarbon constituents seem to indicate that the non-hydrocarbon constituents (MAB extract and asphalten), which have been regarded as an intermediate products in the transformation of kerogen to hydrocarbon by TISSOT et al. (1971) do not have direct relation to the formation of principal zone of petroleum genesis.
日本地質学会の論文
1978-11-30