RT Journal Article
T1 Origin and Biodegradation of Crude Oils from the Northernmost Fields in the Bolivar Coastal Complex (Zulia State, Venezuela)
A1 Escobar, Marcos
A1 Márquez Martínez, Gonzalo
A1 Guerrero, Blanca
A1 Romero Macías, Emilio Manuel
A1 Márquez Martínez, Gonzalo
AB The organic geochemical features of 30 sampled oils from the northern Bolivar CoastalComplex (Lake Maracaibo Basin, NW Venezuela) were examined by combining carbon isotope,classical biomarker, and extended diamondoid analyses to clarify source facies and to assess thethermal maturity and extent of biodegradation of the oils analyzed. In this work, oils are understood asa mixture of two episodes of petroleum generation from the La Luna Formation: a paleobiodegradedoil pulse during Paleogene times and a late pulse having a higher maturity in the post-Oligocene.For the oil samples analyzed, results revealed a mixing composed of different proportions of almost aterrestrially derived siliciclastic-sourced and a purely marine carbonate-sourced oil pulse. Moreover,two main groups of oils were identified by means of hierarchical cluster analysis. Finally, interandintrafield variations in the extent of biodegradation were also assessed using two classificationschemes (Peters and Moldowan, and Manco scales).
PB MDPI
SN 1996-1073
YR 2020
FD 2020-10
LK http://hdl.handle.net/10272/19106
UL http://hdl.handle.net/10272/19106
LA eng
NO Escobar, M., Márquez Martínez, G., Guerrero, B. ... Romero Macías, E. M. ( 2020 ). Origin and Biodegradation of Crude Oils from the Northernmost Fields in the Bolivar Coastal Complex (Zulia State, Venezuela). ENERGIES  Volumen: 13 Número: 21 Número de artículo: 5615  DOI: http://dx.doi.org/10.3390/en13215615
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026