Boletín de Geología

Vol. 38 No. 4 (2016): Boletín de Geología
Articles

DETERMINATION OF ANISOTROPY HTI BY SEISMIC INVERSION USING GENETIC ALGORITHM IN THE VALLE MEDIO OF MAGDALENA BASIN

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  • Juan J. Tovar,
  • Ovidio Almanza,
  • Luis Montes-Vides
Juan J. Tovar
Universidad Nacional de Colombia, Bogotá.
Ovidio Almanza
Universidad Nacional de Colombia, Cra 30 Nº 45-03, Dpto. de Física.
Luis Montes-Vides
Universidad Nacional de Colombia, Dpto. de Geociencias, Bogotá
DOI: https://doi.org/10.18273/revbol.v38n4-2016006

Published 2016-10-31

Keywords

  • HTI anisotropy,
  • seismic inversion,
  • genetic algorithm

How to Cite

Tovar, J. J., Almanza, O., & Montes-Vides, L. (2016). DETERMINATION OF ANISOTROPY HTI BY SEISMIC INVERSION USING GENETIC ALGORITHM IN THE VALLE MEDIO OF MAGDALENA BASIN. Boletín De Geología, 38(4), 107–117. https://doi.org/10.18273/revbol.v38n4-2016006

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Abstract

A genetic algorithm was implemented in MATLAB to perform seismic inversion and determine HTI anisotropy, which was applied to a seismic project in the Middle Magdalena Valley basin in Colombia. The algorithm, which includes the concept of migration of populations (MP), was tested in an isotropic condition (parallel to the fractures), and in a condition of anisotropy (perpendicular to fractures), showing better performance in the testing phase with real data. The presence of weak anisotropy is determined in the study area with associated fractures oriented in azimuth of 45 °, being perpendicular to the current stress regime. This result would explain the weak anisotropy related to fractures associated with a paleo-stress regime.

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