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| Format: | Artículo científico |
| Sprache: | en |
| Veröffentlicht: |
Universitat de Barcelona
2018
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=50558854002 https://www.redalyc.org/journal/505/50558854002/ https://www.redalyc.org/journal/505/50558854002/html/ https://www.redalyc.org/journal/505/50558854002/50558854002.epub https://www.redalyc.org/journal/505/50558854002/movil https://doi.org/10.1344/GeologicaActa2018.16.3.2 |
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Inhaltsangabe:
- Chemical and stable isotope composition (18O/16O, 2H/1H) of formation waters from the Carabobo Oilfield, Venezuela T. Boschetti B. Angulo F. Quintero J. Volcán A. Casalins Ciencias de la Tierra Carabobo area Formation water Orinoco Oil Belt Chemical and isotope composition In this short note, we present the first data on stable isotope composition of the oilfield waters from Carabobo area of the Faja Petrolífera del Orinoco “Hugo Chávez” (Orinoco Oil Belt). From a chemical point of view, the formation waters show a main Na-Cl level (TDS up to 30g/l) with a dilution trend toward Na-HCO3 composition (down to 1g/l). Until now, such a clear net chemical compositional trend was ascribed to a meteoric dilution (fresh/brackish bicarbonate) of the seawater endmember (the saltiest chloride). The isotope results of this study reveal that the seawater mother water was modified during a high-temperature thrusting event (120–125°C), forming 18O-enriched diagenetic water (up to +4‰), which was diluted in recent times by glacial meltwater and present-day meteoric water. The hypothetical presence of flood by a meteoric paleo-water also offers new hints to explain the low API gravity (<10°API biodegraded, extra heavy oil) and composition of the local crude. 2018 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50558854002 https://www.redalyc.org/journal/505/50558854002/ https://www.redalyc.org/journal/505/50558854002/html/ https://www.redalyc.org/journal/505/50558854002/50558854002.epub https://www.redalyc.org/journal/505/50558854002/movil https://doi.org/10.1344/GeologicaActa2018.16.3.2 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.3 Vol.16