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An All-in-one Structural Suite: Thermo-kinematic Modeling Applied to Fault-related Anticlines. The Southern Sub-Andean System Case: the Borebigua Structure

LACR Andes Basins Research Symposium 2020
AAPG Distinguished Lecture

Authors: Juan I. Hernández (presenter), Ernesto Cristallini, Francisco Sánchez, Daniel Balciunas, Andrés Mora, Richard Ketcham, Joaquín Nigro, Roberto Hernández, LA.TE.ANDES

The evolution of fold and thrust belts requires time data restrictions to determine the rates related to the interaction of surface and deformation processes and to quantify the time relationship between the components of the petroleum system: reservoir, seal, source rock and trap. The sub-Andean fold-and-thrust belt in the Bolivian territory in general, and the Borebigua structure in particular, constitutes a complex multi-variable system in which the definition of time-Temperature (t-T) trajectories has led to new suitable structural conclusions.The Time-Temperature (TiTe) tools within specific software allows performing finite element thermal modeling applied to structural analysis and kinematic modeling, giving place to the possibility of working on both the structural and the thermochronological model at the same time. The thermochronological workflow is divided into four processes: 1. Definition of the thermochronological computing grid, 2. Interpolation process, where the structural reconstruction is interpolated in any number of regular time steps, 3. Filling of thermal properties (thermal conductivity, heat capacity and density) and velocities for all grid cells, and 4. Computing of the thermal state at each time in the reconstruction. Isotherms can be plotted, and synthetic samples can be defined to check the feasibility of a structural model and to predict time-Temperature variations at particular locations. In this sense, the software code permitted the development of the thermo-kinematic modeling in the Borebigua structure in the southern sub-Andean system in Bolivia, resulting in modeled ages and time-Temperature paths successfully matching the measured thermochronological data in the study area.


Juan Ignacio Hernández, LA.TE ANDES S.A., GEOMAP S.A.

Juan earned a BSc in Geology from the Universidad Nacional de La Plata, Argentina, and is a PhD candidate at Universidad Nacional de Buenos Aires, Argentina.

He has 11 years of experience as geologist in structural and stratigraphy projects for oil and gas industry in the Central Andes (Sub-Andean System) for different companies in Bolivia and Argentina (2009-2020).

Currently, he is Director and Exploration Geologist at LA.TE ANDES S.A. and GEOMAP S.A., where is responsible for structural and stratigraphic analysis, mapping, thermocrhonological analysis, numerical modeling of apatite-zircon fission-track data and (U-Th-Sm)/He data applied to Time-Temperature evolution (subsidence and structural growing time of fault-related-folds in the Sub-Andean fold-an-thrust-belt). Juan is a member of AAPG, AAGGP and AAS (Asociación Argentina de Sedimentología).

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