Insights from fluid inclusions, thermal and PVT modeling for paleo-burial and thermal reconstruction of the Córdoba petroleum system (NE Mexico) |
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Authors: | Helga Ferket Nicole GuilhaumouFrançois Roure Rudy Swennen |
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Institution: | a Institut Français du Pétrole, 1 et 4 Avenue de Bois-Préau, 92852 Rueil-Malmaison Cedex, France b Instituto Mexicano del Petróleo, Eje Central Lazaro Cárdenas 152, Col. San Bartolo Atepehuacán, 07730 México D.F., Mexico c Museum National d'Histoire Naturelle, LMCM/UMR 7202-Case 52-57, Rue Cuvier, 75231 Paris, France d Katholieke Universiteit Leuven, Geologie, Celestijnenlaan 200E, Bus 02408, 3001 Heverlee, Belgium |
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Abstract: | Carbonate reservoirs in the Córdoba petroleum system (NE Mexico) passed through a multiphase deformation history complicating the petroleum geology. The area evolved from passive margin and foreland setting to Laramide fold and thrust belt (FTB) that was subsequently buried below the Tertiary-Quaternary Veracruz Basin, which in turn underwent transpressional deformation. Reconstruction of paleo-burial (erosion) and paleo-thermicity through the different zones of the FTB and adjacent foreland is a challenging task since classical calibration tools fail to discriminate between several kinematic and thermal models. In this study results from detailed diagenetic and fluid inclusion (FI) analyses on carbonates from the western part of the Córdoba Platform helped constraining paleo-thermicity. Combined microthermometry, synchrotron FTIR analyses and PVT modeling of cogenetic hydrocarbon-aqueous FI allowed also calculation of absolute pressures. Thermal modeling exercises calibrated with organic maturity parameters, bottom-hole temperatures or temperatures from FI demonstrate that without controlling also paleo-erosion the model results may be misleading. |
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Keywords: | Thrust belt Fluid inclusion Diagenesis Geothermal gradient PVT modeling Có rdoba Platform |
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