Geochemical Characteristics of Expelled and Residual Oil from Artificial Thermal Maturation of an Early Permian Tasmanite Shale, Australia

Lipid biomarkers play an important role in defining oil-source rock correlations. A fundamental assumption is that composition (or ratios) of biomarkers in oil is not significantly different from that in bitumen in the source rock. In order to compare the geochemical characteristics of expelled oil...

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Autores principales:	Xiaomin Xie, Ye Wang, Jingwen Lin, Fenting Wu, Lei Zhang, Yuming Liu, Xu Hu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	biomarkers Tasmanite oil shale artificial maturation experiment expelled oil residual oil geochemical parameters Technology T
Acceso en línea:	https://doaj.org/article/59dd612c5b4b4ca686eb73809966b2b0
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spelling	oai:doaj.org-article:59dd612c5b4b4ca686eb73809966b2b02021-11-11T15:59:19ZGeochemical Characteristics of Expelled and Residual Oil from Artificial Thermal Maturation of an Early Permian Tasmanite Shale, Australia10.3390/en142172181996-1073https://doaj.org/article/59dd612c5b4b4ca686eb73809966b2b02021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7218https://doaj.org/toc/1996-1073Lipid biomarkers play an important role in defining oil-source rock correlations. A fundamental assumption is that composition (or ratios) of biomarkers in oil is not significantly different from that in bitumen in the source rock. In order to compare the geochemical characteristics of expelled oil and residual oil, a Permian Tasmanite oil shale was used for an artificial maturation experiment to simulate the oil generation period. The results show that the Tasmanite oil shale generated high amounts of hydrocarbons (731 mg HC/g TOC) at low maturation temperatures (340 °C). The hydrocarbon (HC) group compositions are different between the expelled oil (with more aromatic HC and saturated HC) and the residual oil (with more resin fraction and asphaltene). The Pr/Ph ratio (up to 4.01) of the expelled hydrocarbons was much higher than that in residual oil (<1.0). Maturity-related biomarkers Ts/(Ts + Tm), and αααC29-20S/(20S + 20R) and C29-αββ/(ααα + αββ), also showed complicated variations with pyrolysis temperature, especially at post peak oil generation. C27-, C28-, and C29- sterane distributions showed variations with pyrolysis temperature. Therefore, without considering the influence of maturity on the abundance of compounds, either source, maturity and/or organic matter type from the chemical characteristics may not be correct.Xiaomin XieYe WangJingwen LinFenting WuLei ZhangYuming LiuXu HuMDPI AGarticlebiomarkersTasmanite oil shaleartificial maturation experimentexpelled oilresidual oilgeochemical parametersTechnologyTENEnergies, Vol 14, Iss 7218, p 7218 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biomarkers Tasmanite oil shale artificial maturation experiment expelled oil residual oil geochemical parameters Technology T
spellingShingle	biomarkers Tasmanite oil shale artificial maturation experiment expelled oil residual oil geochemical parameters Technology T Xiaomin Xie Ye Wang Jingwen Lin Fenting Wu Lei Zhang Yuming Liu Xu Hu Geochemical Characteristics of Expelled and Residual Oil from Artificial Thermal Maturation of an Early Permian Tasmanite Shale, Australia
description	Lipid biomarkers play an important role in defining oil-source rock correlations. A fundamental assumption is that composition (or ratios) of biomarkers in oil is not significantly different from that in bitumen in the source rock. In order to compare the geochemical characteristics of expelled oil and residual oil, a Permian Tasmanite oil shale was used for an artificial maturation experiment to simulate the oil generation period. The results show that the Tasmanite oil shale generated high amounts of hydrocarbons (731 mg HC/g TOC) at low maturation temperatures (340 °C). The hydrocarbon (HC) group compositions are different between the expelled oil (with more aromatic HC and saturated HC) and the residual oil (with more resin fraction and asphaltene). The Pr/Ph ratio (up to 4.01) of the expelled hydrocarbons was much higher than that in residual oil (<1.0). Maturity-related biomarkers Ts/(Ts + Tm), and αααC29-20S/(20S + 20R) and C29-αββ/(ααα + αββ), also showed complicated variations with pyrolysis temperature, especially at post peak oil generation. C27-, C28-, and C29- sterane distributions showed variations with pyrolysis temperature. Therefore, without considering the influence of maturity on the abundance of compounds, either source, maturity and/or organic matter type from the chemical characteristics may not be correct.
format	article
author	Xiaomin Xie Ye Wang Jingwen Lin Fenting Wu Lei Zhang Yuming Liu Xu Hu
author_facet	Xiaomin Xie Ye Wang Jingwen Lin Fenting Wu Lei Zhang Yuming Liu Xu Hu
author_sort	Xiaomin Xie
title	Geochemical Characteristics of Expelled and Residual Oil from Artificial Thermal Maturation of an Early Permian Tasmanite Shale, Australia
title_short	Geochemical Characteristics of Expelled and Residual Oil from Artificial Thermal Maturation of an Early Permian Tasmanite Shale, Australia
title_full	Geochemical Characteristics of Expelled and Residual Oil from Artificial Thermal Maturation of an Early Permian Tasmanite Shale, Australia
title_fullStr	Geochemical Characteristics of Expelled and Residual Oil from Artificial Thermal Maturation of an Early Permian Tasmanite Shale, Australia
title_full_unstemmed	Geochemical Characteristics of Expelled and Residual Oil from Artificial Thermal Maturation of an Early Permian Tasmanite Shale, Australia
title_sort	geochemical characteristics of expelled and residual oil from artificial thermal maturation of an early permian tasmanite shale, australia
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/59dd612c5b4b4ca686eb73809966b2b0
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_version_	1718432414507728896

Geochemical Characteristics of Expelled and Residual Oil from Artificial Thermal Maturation of an Early Permian Tasmanite Shale, Australia

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