Insights from fluid inclusions, thermal and PVT modeling for paleo-burial and thermal reconstruction of the Cordoba petroleum system (NE Mexico)
Ferket, Helga × Guilhaumou, Nicole Roure, François Swennen, Rudy #
Butterworth Scientific Ltd.
Marine and Petroleum Geology vol:28 issue:4 pages:936-958
Carbonate reservoirs in the Cordoba 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 Cordoba Platform helped constraining paleo-thermicity.
Combined microthermometry, synchrotron FTIR analyses and PVT modeling of cogenetic hydrocarbonaqueous
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.