Experimental controls on D/H and 13C/12C ratios of kerogen, bitumen and oil during hydrous pyrolysis

Schimmelmann, A.; Boudou, J. -P.; Lewan, M. D.; Wintsch, R. P.

Abstract:

Large isotopic transfers between water-derived hydrogen and organic hydrogen occurred during hydrous pyrolysis experiments of immature source rocks, in spite of only small changes in organic 13C/12C. Experiments at 330 ??C over 72 h using chips or powder containing kerogen types I and III identify the rock/water ratio as a main factor affecting ????D for water and organic hydrogen. Our data suggest that larger rock permeability and smaller rock grain size increase the H-isotopic transfer between water-derived hydrogen and thermally maturing organic matter. Increasing hydrostatic pressure may have a similar effect, but the evidence remains inconclusive. ?? 2001 Elsevier Science Ltd. All rights reserved.

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Article

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70023342

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Schimmelmann, A.; Boudou, J. -P.; Lewan, M. D.; Wintsch, R. P.

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1018

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English

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Organic Geochemistry

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Experimental controls on D/H and 13C/12C ratios of kerogen, bitumen and oil during hydrous pyrolysis; 2001; Article; Journal; Organic Geochemistry; Schimmelmann, A.; Boudou, J. -P.; Lewan, M. D.; Wintsch, R. P.