UE High resolution seismic imaging by waveform inversion

Degrees incorporating this pedagocial element :


Full waveform inversion (FWI) is a high resolution seismic imaging method allowing for the quantitative reconstruction of subsurface parameters such as wave propagation velocities, density, attenuation, anisotropy parameters. After introducing the FWI method in the general context of exploration seismic imaging and its application in the industry and in the academy, the course will focus on the main ingredients necessary to implement this method. The first part of the course will be devoted to the study of seismic wave propagation in complex media. Physical, mathematical, and numerical aspects of this problem will be presented. The second part of the course will focus on the inversion strategy, based on local optimization methods. Physical interpretaion of the subsurface model reconstruction will be given, as well as insights on numerical algorithms used to solve the optimization problems. Examples of application of the method on realistic applications will be presented. emphasizing high performance computing issues which need to be tackled to obtain satisfactory results. As FWI is at the confluence between disciplines such as physics, geophysics, mathematics, numerical analysis, and high performance computing, this course should interest students curious to investigate how efficient numerical methods can be used in order to tackle a “real life” difficult problem.