Metodología para determinar el modelo espacial del gradiente geotérmico en las cuencas sedimentarias del Valle Medio del Magdalena, Cordillera Oriental y Llanos Orientales en Colombia

Abstract

The present research presents a methodology for the generation of the geothermal gradient spatial model correcting the effect of the topography. The methodology developed was applied to wells drilled with Bottom Hole Temperatures (BHT) in three sedimentary basins with notable differences in altitude and topography, corresponding to the Magdalena Middle Valley with 2330 oil wells, Eastern Mountain Range with 112 oil wells and Eastern Plains with 861 oil wells. The spatial modeling of the geothermal gradient was generated by geostatistical interpolation (IDW and Kriging) and geostatistical simulation (Sequential Gaussian Simulation), in order to establish the incidence of the topography effect on the superficial surface and the subsoil variation of the temperature. The analysis of results determined that without the influence of the topography on the variation of the temperature present in the subsoil, anomalous gradients with maximum values of 79.02°C/km were reached in the basin of the Middle Valley of Magdalena, 80.14°C/km In the Eastern Mountain Range basin and 80.63°C/km in the Eastern Plains basin.