Characterization of oils from Fazenda Belém – Potiguar Basin, Northeast Brazil

Iara Samara de Alcântara SilvaPrograma de Pós-Graduação em Química, Laboratório de Geoquímica Orgânica, Departamento de Química, Universidade Federal do Piauí, Campus Universitário Ministro Petrônio Portella, s/n, Ininga, Teresina, PI, Brasil

Alek André Costa de SousaPrograma de Pós-Graduação em Química, Laboratório de Geoquímica Orgânica, Departamento de Química, Universidade Federal do Piauí, Campus Universitário Ministro Petrônio Portella, s/n, Ininga, Teresina, PI, Brasil

Igor Viegas Alves Fernandes de SouzaPETROBRAS, R&D Center, Organic Geochemistry Section, Brazil

Ramsés CapillaPETROBRAS, R&D Center, Organic Geochemistry Section, Brazil

Georgiana Feitosa da CruzLaboratório de Engenharia e Exploração de Petróleo, Centro de Ciência e Tecnologia, Universidade Estadual do Norte Fluminense, Rodovia Amaral Peixoto, km 163, Macaé – RJ, Brasil

Antônia Maria das Graças Lopes CitóPrograma de Pós-Graduação em Química, Laboratório de Geoquímica Orgânica, Departamento de Química, Universidade Federal do Piauí, Campus Universitário Ministro Petrônio Portella, s/n, Ininga, Teresina, PI, Brasil

Sidney Gonçalo de LimaPrograma de Pós-Graduação em Química, Laboratório de Geoquímica Orgânica, Departamento de Química, Universidade Federal do Piauí, Campus Universitário Ministro Petrônio Portella, s/n, Ininga, Teresina, PI, BrasilCorrespondence[email protected] [email protected]

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ABSTRACT

Asphaltenes (isolated by preparative TLC) from Potiguar Basin (Brazil) crude oils were submitted to mild oxidation to disrupt their structure, releasing the occluded oil. The released hydrocarbons were compared with those from the original crude oil, in order to provide an additional insight regarding composition in biomarkers and depositional paleoenvironment. It was possible to suggest that the oil samples present low thermal evolution, marine depositional environment and anoxide. The results showed that the release of these occluded hydrocarbon, which are remnants from the original oil, can be a tool for the geochemical study of highly biodegraded oils, leading to better maturation and origin information.

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Acknowledgements

The authors thank FAPEPI, PETROBRAS and CAPES for financial support, as well as B. Timah for grammatical revision.

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Characterization of oils from Fazenda Belém – Potiguar Basin, Northeast Brazil

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Characterization of oils from Fazenda Belém – Potiguar Basin, Northeast Brazil

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