RT Journal Article
T1 Classical Biomarker and Quantitative Extended Diamondoid Analysis Fingerprints for Crude Oils from Deepwater Developments in Block 17, Lower Congo Basin, Angola
A1 Boente López, Carlos
A1 Márquez Martínez, Gonzalo
A1 Romero Macías, Emilio Manuel
A1 Guzmán, Marco Antonio
A1 Rodrigues, Cristina
A1 Marín, Patricia
A1 Márquez Martínez, Gonzalo
AB The organic geochemistry of six oil samples from the offshore Block 17 (Lower Congo Basin,northwestern Angola) was studied by a combination of classical biomarker and extended diamondoidanalyses to elucidate source rock facies, the extent of biodegradation, and thermal maturity. Based onmolecular data, oils are interpreted as depicting a mixture of two pulses of hydrocarbon generationprobably from the Bucomazi and Malembo formations. Geochemical results also gave evidenceof mixing of a lacustrine siliciclastic-sourced oil charge and a second more terrestrially derived oiltype in the samples analyzed. A single genetic oil family was identified through hierarchical clusteranalysis; however, two groups of oils were identified on the basis of their biodegradation levelsusing the Peters/Moldowan scale. Lower and upper Malembo oils have a slight depletion and anotable absence of n-alkanes, suggesting PM levels of 1 and 2, respectively. Most molecular maturityparameters of the oil samples suggest a maturity level equivalent to the onset of the peak of the oilgenerative window.
PB MDPI
SN 1660-4601
YR 2020
FD 2020-10
LK http://hdl.handle.net/10272/19103
UL http://hdl.handle.net/10272/19103
LA eng
NO Boente  López, C., Márquez Martínez, G., Marín, P., Romero Macías, E., Rodrigues, C., & Guzmán, M. A. (2020). Classical Biomarker and Quantitative Extended Diamondoid Analysis Fingerprints for Crude Oils from Deepwater Developments in Block 17, Lower Congo Basin, Angola. International Journal of Environmental Research and Public Health, 17(19), 7204. DOI: https://doi.org/10.3390/ijerph17197204
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026