Source Wavefield Reconstruction for Large-scale 3D Elastic Full-waveform Inversion
E.B. Raknes and W. Weibull
Event name: 77th EAGE Conference and Exhibition 2015
Session: Full Waveform Inversion I
Publication date: 01 June 2015
Info: Extended abstract, PDF ( 1.06Mb )
Price: € 20
In elastic full-waveform inversion, the medium parameters are updated iteratively by incrementing them with the derivatives of the misfit functional with respect to each of the medium parameters. The efficient implementation of the derivative computations require large amount of computer memory storage. The large requirements in terms of storage is one the main barriers for the application of elastic full-waveform inversion to large scale 3D problems. In this paper, we propose and test a strategy based on reverse-time wavefield reconstruction using the Kirchhoff integral that effectively reduces the storage requirements, at the cost of a factor of two increase in the computational runtime.