Abstract

CHAJIN, Patricia; CAMACHO, Germán  and  HERRERA, Edwar. Application of the wavefield illumination method in a subthrust model in the Upper Magdalena Basin (Colombia). Bol. geol. [online]. 2021, vol.43, n.1, pp.163-171.  Epub Jan 01, 2021. ISSN 0120-0283.  https://doi.org/10.18273/revbol.v43n1-2021008.

Complex structures like subthrust show high risk during the definition of structural traps in low quality seismic images in depth, so we can use the structural interpretation to simulate the subthrust illumination by wavefield of a prospect area in order to reduce the uncertainty and support the oil exploration process.

In general, we performed an exercise of 2D geophysical modeling using a wavefield illumination simulator. At first, we interpreted two geological models from a seismic line in depth. The geological interpretation was adjusted with information about structural styles in this part of Upper Magdalena Basin.

Then, we use a velocity scenario and assign these velocities to both geological models. The wavefield illumination method allows us to see all of the wavepaths in the different pair of source-receivers in order to do a fast evaluation of the structure illumination. This could be used to improve the seismic acquisitions in structurally complex media.

Keywords : Geophysical modeling; Illumination; Thrust; Wavefield.

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