Biochemical evolutionary significance of Ordovician oils and their sources

Reed, Jackie D.; Illich, Harold; Horsfield, Brian

doi:10.1016/0146-6380(86)90035-5

Cited by 119 publications

(35 citation statements)

References 20 publications

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“…McKirdy et al in 1983 identified markers of the organisms of the time in pre-Ordovician oils. This aspect was also illustrated by Seifert and Moldowan (1981) and by Reed et al (1986). It deserves further development.…”

Section: The Dustbins Of Geological History and The Evolution Of Livimentioning

confidence: 96%

A History of Organic Geochemistry

Durand¹

2003

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Histoire de la géochimie organique -La géochimie organique est née des interrogations sur l'origine du pétrole. Son développement a pour l'instant été lié à celui de l'exploration pétrolière. Elle ne s'est constituée en science autonome qu'un peu après 1960. Les années 1965-1985 furent particulièrement productives : pendant cette période les mécanismes de la formation des gisements de pétrole et de gaz naturel furent explicités et de nombreux biomarqueurs, témoins de l'origine organique du pétrole furent identifiés. La connaissance des kérogènes, matière première de la formation du pétrole, fit également des progrès décisifs et des outils d'aide à l'exploration pétrolière virent le jour, comme les méthodes de corrélation huiles-roches mères, le Rock-Eval, et les modèles mathématiques de simulation de la formation et de la migration du pétrole. En même temps eut lieu un rapprochement avec la science des charbons et une extension de la géochimie organique à des domaines variés, tels que la sédimentologie organique, la microbiologie des sédiments ou la formation des gîtes minéraux. La période actuelle se caractérise par une application croissante des connaissances acquises à des domaines autres que l'exploration pétrolière et par son intégration à l'ensemble des disciplines géologiques. Cette intégration a lieu, entre autres, par sa contribution au développement des « simulateurs de bassin », qui simulent mathématiquement l'évolution des bassins sédimentaires au cours du temps et la formation des gisements de pétrole et de gaz naturel qui en résulte. Dans les années qui viennent, la géochimie organique aura encore un rôle important à jouer dans l'exploration et la production du pétrole et plus généralement des combustibles fossiles. Mais son avenir à plus long terme est probablement dans l'étude des interactions des produits de l'activité humaine, en particulier les polluants organiques et les gaz à effet de serre, avec la géosphère, en relation avec la recherche d'un développement durable et la compréhension des mécanismes des changements climatiques. Le développement de la géochimie organique moderne doit beaucoup aux instituts professionnels de recherche et en particulier à deux d'entre eux, l'Institut français du pétrole (IFP)

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Section: The Dustbins Of Geological History and The Evolution Of Livimentioning

confidence: 96%

A History of Organic Geochemistry

Durand¹

2003

Oil & Gas Science and Technology - Rev. IFP

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“…In general, the factor that distinguishes the crude oil generated by Kukersite-type source rocks from others generated by organic matter is the odd-even predominance of low carbon number N-alkane. In the meantime, the content of high carbon number N-alkane is relatively low [1][2][3][4][5][6][7][8][9][10][11][12][13]. However, this feature has yet been found in the crude oil of the Lower Paleozoic petroleum system in the Tarim Basin [19].…”

Section: Identification Of the G Prisca's Biogenic Biomarker Compounmentioning

confidence: 99%

“…The crude oil contributed by G. prisca usually has distinctive molecular geochemical fingerprint. In another word, there is odd-carbon number predominance such as n-C 15 , n-C 17 and n-C 19 in N-alkanes with low carbon numbers; meanwhile the relevant content of N-alkanes with high carbon numbers is very less [1][2][3][4][5][6][7][8][9][10][11][12][13]. According to the statistics, Kukersite-type source rocks are the primary contributor of petroleum resources of the Lower Paleozoic marine petroleum field that is discovered in north American platform, including the G. prisca-enriched and G. prisca-diluted types [11].…”

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confidence: 99%

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Identification of the Kukersite-type source rocks in the Ordovician Stratigraphy from the Tarim Basin, NW China

et al. 2013

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“…3) with a low OEP (Table 2) in the samples, particularly n-C 15 , n-C 17 , and n-C 19 in the Ordovician samples, and existence of trace amounts of n-alkylcyclochexanes with a slight odd-over-even predominance around C 17 alkylcyclohexane (Douglas et al, 1991;Fowler, 1992;Fowler et al, 1986) are characteristic features of organic matter derived from Gloeocapsomorpha prisca algae (Hoffmann et al, 1987;Peters et al, 2005;Reed et al, 1986). Bacteriohopanepolyols, which are bacterial membrane lipids, have been considered as the precursor of hopanoid biomarkers (Ourisson and Albrecht, 1992;Ourisson et al, 1979;Ourisson and Rohmer, 1992), consistent with the high relative abundance of homohopanes (C 31 -C 34 ) in all samples (Fig.…”

Section: Origin Of Organic Mattermentioning

confidence: 99%

Organic geochemical characteristics of black shales across the Ordovician–Silurian boundary in the Holy Cross Mountains, central Poland

Mustafa

Sephton

Watson

et al. 2015

Marine and Petroleum Geology

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Black shales in the Holy Cross Mountains area of Poland provide a record of environmental change across the Ordovician-Silurian boundary. The changing depositional conditions have generated a variation in organic matter contents above and below the boundary. Investigating the organic constitution of these black shales has the potential to reveal how their organic matter contents were generated and how suitable these rocks and their lateral equivalents may be for exploitation as shale and Silurian rocks, these rocks were buried and subjected to thermal maturation. Rock Eval and Mustafa, K.A., Sephton M.A., Spathopoulos, F., Watson, J.S., Krzywiec, P. Organic geochemical characteristics of black shales across the Ordovician-Silurian boundary in the Holy Cross Mountains, Central Poland, Marine and Petroleum Geology, doi:10.1016/j.marpetgeo.2015.08.018. 2 biomarker thermal maturity parameters all indicate that the organic matter is mature and lies within the oil window. The Ordovician and Silurian shales have direct relevance to recent attempts to discover and exploit shale gas reservoirs in Poland. Our data and interpretations suggest that the relatively low TOC values (<2%) and low maturities for gas generation render these rocks unsuitable for commercial shale gas production. The progressive improvement in conditions for preserving organic matter across the Ordovician-Silurian boundary does, however, leave the possibility that more suitable deposits occur in Early Silurian rocks in other parts of the basin.

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Biochemical evolutionary significance of Ordovician oils and their sources

Cited by 119 publications

References 20 publications

A History of Organic Geochemistry

A History of Organic Geochemistry

Identification of the Kukersite-type source rocks in the Ordovician Stratigraphy from the Tarim Basin, NW China

Organic geochemical characteristics of black shales across the Ordovician–Silurian boundary in the Holy Cross Mountains, central Poland

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