Modeling an atypical petroleum system: A case study of hydrocarbon generation,migration and accumulation related to igneous intrusions in the Neuquen Basin,Argentina |
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| Authors: | F Rodriguez Monreal HJ Villar R Baudino D Delpino S Zencich |
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| Institution: | 1. YPF S.A. Exploración Argentina Onshore, Esmeralda 255, C1035ABE, Buenos Aires, Argentina;2. GeoLab Sur S. A. Italia 1616, 1602 Florida, Buenos Aires, Argentina;3. YPF S.A. Exploración, Esmeralda 255, C1035ABE Buenos Aires, Argentina |
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| Abstract: | In the Altiplanicie del Payún area (Neuquen Basin, Argentina), immature source rock sections intruded by up to 600 m thick Tertiary laccoliths show full spectrum maturity aureoles over hundreds of meters from the contacts. Commercial oil accumulations (20–33°API) and oil shows are located along the entire column, both in sandstone/carbonate and fractured igneous reservoirs. A challenging numerical model that included the emplacement of the intrusive bodies, with extreme temperature ranges and unusually short calculation time steps, has been done with the aim to better understand hydrocarbon generation and migration processes related to these thermal anomalies. |
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| Keywords: | Neuquen Basin Magmatic intrusions Thermal anomaly Atypical petroleum system Basin modeling Petroleum geochemistry Diamondoids Overpressure |
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