Full text loading...
-
Optimal Experimental Design in Full Waveform Inversion
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 84th EAGE Annual Conference & Exhibition, Jun 2023, Volume 2023, p.1 - 5
Abstract
Summary
In this work we propose a new optimality criterion for the design of acquisition geometries in the context of Full Waveform Inversion, which is based on the wavenumber spectrum of the gradient. We suppose an acquisition is composed of Ns sources and Nr receivers and where each source is fired with all the receivers, generating Ns × Nr wavenumbers. We are looking for the positions of sources and receivers that would optimize the distribution of wavenumbers. We are able to outline the envelope of the wavenumber cloud so this allows us to define the underlying problem as an instance of Centroidal Voronoi Tessellation and to propose a new energy function to minimize. To illustrate our method we show the optimized geometry for surface, circular and in transmission types of acquisitions. We compare them and the wavenumber spectrum generated with the evenly-spaced equivalents. We also show the impact of the optimized acquisition on a gradient for the reconstruction of a scattering point in a homogeneous medium. The result of our optimization fulfills the criterion of optimal distribution of the wavenumbers and this has the consequence to produce gradients that are more focused at the position of the anomaly.
© EAGE Publications BV