Full Waveform Inversion in generalized coordinates for zones of curved topography

  • César Augusto Arias- Chica
  • David Abreo
  • Sergio Abreo
  • Luis Fernando Duque- Gómez
  • Ana Beatríz Ramírez- Silva
Keywords: Full Wave Form Inversion, Reverse Time Migration, Rugged topography, Velocity estimation, Acoustic wave equation

Abstract

Full waveform inversion (FWI) has been recently used to estimate subsurface parameters, such as velocity models. This method, however, has a number of drawbacks when applied to zones with rugged topography due to the forced application of a Cartesian mesh on a curved surface. In this work, we present a simple coordinate transformation that enables the construction of a curved mesh. The proposed transformation is more suitable for rugged surfaces and it allows mapping a physical curved domain into a uniform rectangular grid, where acoustic FWI can be applied in the traditional way by introducing a modified Laplacian. We prove that the proposed approximation can have a wide range of applications, producing precise near-surface velocity models without increasing the computing time of the FWI.

How to Cite
Arias- Chica, C. A., Abreo, D., Abreo, S., Duque- Gómez, L. F., & Ramírez- Silva, A. B. (2018). Full Waveform Inversion in generalized coordinates for zones of curved topography. CT&F - Ciencia, Tecnología Y Futuro, 8(2). https://doi.org/10.29047/01225383.84

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Published
2018-12-19
Section
Scientific and Technological Research Articles
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