Comparison of petroleum generation kinetics by isothermal hydrous and nonisothermal open-system pyrolysis

Lewan, Michael D.; Ruble, Tim E.

doi:10.1016/s0146-6380(02)00182-1

Cited by 232 publications

(144 citation statements)

References 29 publications

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“…Whatever the considered oil-shale bed, all kerogens from the Permian Autun Basin show HI values systematically below 700 mg/g TOC, unexpectedly low for a Type I OM (Espitalié et al, 1985) and do not display mono-energetic Ea distribution, which characterize pure lacustrine OM (Behar et al, 2010;Lewan and Ruble, 2002;Tegelaar and Noble, 1994 and Pelet, 1987) like in the boghead sample. These characteristics could be explained by maturity and/or by mixing of different OM types.…”

Section: Organic Matter Sources and Maturity Of Oil-shalesmentioning

confidence: 93%

Palaeoenvironmental control on primary fluids characteristics of lacustrine source rocks in the Autun Permian Basin (France)

Garel¹,

Béhar²,

Schnyder³

et al. 2017

Bull. Soc. géol. Fr.

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-The Autunian (Late Gzhelian-Sakmarian, ∼295 Ma) of the Autun Basin (Saône-et-Loire, France) is well known for its lacustrine oil-shales and boghead that were exploited during the 19th and 20th centuries. A study of the kerogen geochemistry, palynofacies, hydrocarbon (HC) distribution of pyrolysates and kinetics on these organic-rich sediments gave indications on the control of lacustrine primary fluid characteristics by palaeoenvironmental settings. Palynofacies results have shown a Botryococcus algae dominance in the boghead, whereas the oil-shales were dominated either by a mixing of terrestrial particles and lacustrine phytoplanktonic/bacterial organic matter (OM), or by a lacustrine OM that suffered biodegradation within the water column. During the Autunian, an increasing trend of degraded lacustrine OM concentration is observed in the successive oil-shales. Geochemical and kinetics analyses showed that, except for the boghead, hydrogen index values were < 700 mg/g TOC and activation energies diagram showed multi-energetic profiles, unexpected for such a lacustrine OM. Along with pyrolysates primary fluids ones, these results unraveled two groups of oil-shale samples. On the one hand, samples dominated by well-preserved lacustrine and terrestrial OM produced primary fluids dominated by n-alkanes with (n-C 6 -n-C 14 ) /n-C 14þ n-alkanes ratio depending on the proportion of terrestrial OM. They were only encountered in the three oldest oil-shales. On the other hand, the HC profile of fluids originating from samples dominated by degraded lacustrine OM, which was obtained for the first time in this study, show low n-alkanes concentrations and a relatively prominent hump. These samples were only present in the three youngest oilshale levels. Finally, the boghead showed a link between strong concentration of the Pila genus of Botryococcus algae and a primary fluid dominated by n-C 6 -n-C 14 n-alkanes. By comparing these data with published palaeoenvironmental studies, it appears that the kind of dominant OM, and thus the HC distribution of primary fluids, is controlled by the lake level: a lower depth preventing the settlement of anoxic conditions in the bottom waters, and the subsequent good preservation of the OM. During the Autunian, the lake level decreased, consequence of a reduced tectonic activity and of the beginning of a dryer period. Finally, these changes will have caused a strong decrease of the nutrient influx to the lake, favoring the bloom of Botryococcus algae that accumulated to form the boghead. cinétiques ont montré que, excepté pour le boghead, les valeurs d'index d'hydrogène étaient < 700 mg/g COT et les énergies d'activation montraient des profils pluri-énergétiques, inhabituels pour une MO lacustre. Ajoutés à ceux des fluides primaires de pyrolysats, ces résultats ont mis en évidence deux groupes d'échantillons de schistes-bitumineux. Le premier est marqué par une dominance de la MO lacustre et terrestre bien préservée et produit des fluides primaires dominés par les n-alcanes ave...

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Section: Organic Matter Sources and Maturity Of Oil-shalesmentioning

confidence: 93%

Palaeoenvironmental control on primary fluids characteristics of lacustrine source rocks in the Autun Permian Basin (France)

Garel¹,

Béhar²,

Schnyder³

et al. 2017

Bull. Soc. géol. Fr.

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“…Price et al, 1979;Price et al, 1981;Price, 1982;Mango, 1991;Hayes, 1991), laboratory pyrolysis investigation of oils (e.g. Ungerer and Pelet, 1987;Ungerer et al, 1988;Behar et al, 1992;Behar et al, 1997a;1997b;Schenk et al, 1997;Dieckmann et al, 1998;Lewan and Ruble, 2002;Hill et al, 2003;Lehne and Dieckmann, 2007a;2007b;Behar et al, 2008), or theoretical calculations (e.g. Dominé et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Retardation of oil cracking to gas and pressure induced combination reactions to account for viscous oil in deep petroleum basins: Evidence from oil and n-hexadecane pyrolysis at water pressures up to 900 bar

Uguna

Carr²,

Snape

et al. 2016

Organic Geochemistry

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“…Ma turity mod el ling was cal i brated tak ing ad van tage of Rock-Eval T max tem per a ture and vitrinite reflectance R o data pub lished by Koltun (1992), Matyasik (2000), Kotarba et al (2007), Maaekowski et al (2009) and Kosakowski et al (2009). The ki netic pa ram e ters of kerogen (E a and A 0 ) for the mod el ling were cal cu lated ac cord ing to pro ce dures de scribed by Lewan and Ru ble (2002).…”

Section: Modelling Proceduresmentioning

confidence: 84%

“…Based on these data, ki netic param e ters of kerogen (E a and A 0 ) were cal cu lated (Lewan and Ru ble, 2002). The low-sul phur kerogen (Hunt et al, 1991) is char ac ter ized by ac ti va tion en ergy E a of 60.6 kcal/mol and A o of 2.69 ´ 10 29 1/Ma, and 55.3 kcal/mol and 4.85 ´ 10 27 1/Ma, in the Pivdenny Monastyrets area and the Novoshidnytsia-Pivnichna Zavoda area, re spec tively (Ta ble 4).…”

Section: Boryslav-pokuttya Unitmentioning

confidence: 99%

1-D modelling of hydrocarbon generation and expulsion from Oligocene Menilite source rocks in the San and Stryi rivers region (Polish and Ukrainian Carpathians)

Kosakowski

2013

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Based on geo chem i cal data of the Oligocene Menilite Shales in the Boryslav-Pokuttya, Skole (Skyba), Silesian (Krosno) and Dukla units in the Carpathians, be tween Krosno and Styi towns, 1D mod el ling of gen er a tion and ex pul sion pro cesses of hy dro car bons has been car ried out. These strata are char ac ter ized by mostly high or ganic mat ter con tent, the to tal or ganic car bon (TOC) con tent reach ing up to 26 wt.%. The high est hy dro car bon po ten tial was re corded in the Boryslav-Pokuttya and Skole units. Or ganic mat ter in the Skole (Skyba) Unit is im ma ture; in turn, in the Boryslav-Pokuttya, Silesian (Krosno) and Dukla units it is ma ture enough for gen er at ing hy dro car bons. Re sults of the mod el ling re veal that dur ing the de po si tion of flysch in all the above men tioned Outer Carpathian units the Menilite source rocks did not reach a level of ther mal ma tu rity high enough to gen er ate hy dro car bons. Con di tions of hy dro car bon gen er a tion were ob tained in the thrust ing stage of the Outer Carpathians. In gen eral, the pro cess of hy dro car bon gen er a tion be gan at depths of less than 2 km in the Pol ish part, and about 4 km in the Ukrai nian part. The kerogen trans for ma tion level reached from 10% to to com plete trans for ma tion as in the Suche Rzeki IG 1 well.The re sults of the mod el ling of hy dro car bon gen er a tion and ex pul sion from the source rocks of all the units re veal that the high est ma tu rity and the high est gen er a tion po ten tial were ob tained by the Menilite Shales in the Silesian and Dukla units.

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Comparison of petroleum generation kinetics by isothermal hydrous and nonisothermal open-system pyrolysis

Cited by 232 publications

References 29 publications

Palaeoenvironmental control on primary fluids characteristics of lacustrine source rocks in the Autun Permian Basin (France)

Palaeoenvironmental control on primary fluids characteristics of lacustrine source rocks in the Autun Permian Basin (France)

Retardation of oil cracking to gas and pressure induced combination reactions to account for viscous oil in deep petroleum basins: Evidence from oil and n-hexadecane pyrolysis at water pressures up to 900 bar

1-D modelling of hydrocarbon generation and expulsion from Oligocene Menilite source rocks in the San and Stryi rivers region (Polish and Ukrainian Carpathians)

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