Seismic migration in generalized coordinates

5th Colombian Conference of Engineering Physics

物理学;工业技术

Arias, C.^1 ; Duque, L.F.^1

Centro de Ciencias de la Computación, Instituto Tecnológico Metropolitano, Medellín, Colombia^1

关键词: Flat surfaces;    Generalized coordinates;    Laplacians;    Reverse time migrations;    Rugged topography;    Seismic migration;    Sub-surfaces;    Velocity model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/850/1/012018/pdf
DOI  :  10.1088/1742-6596/850/1/012018

学科分类：工业工程学

来源: IOP

【 摘 要 】

Reverse time migration (RTM) is a technique widely used nowadays to obtain images of the earth's sub-surface, using artificially produced seismic waves. This technique has been developed for zones with flat surface and when applied to zones with rugged topography some corrections must be introduced in order to adapt it. This can produce defects in the final image called artifacts. We introduce a simple mathematical map that transforms a scenario with rugged topography into a flat one. The three steps of the RTM can be applied in a way similar to the conventional ones just by changing the Laplacian in the acoustic wave equation for a generalized one. We present a test of this technique using the Canadian foothills SEG velocity model.