The numerical tests show that the 4-phase FWI inverts the velocity correctly despite the lack of low-frequency information and an inaccurate starting velocity model both in synthetic data and field data. The detailed methods of applying each FWI phase are explained, and the proposed method is validated via numerical tests with a SEG/EAGE salt synthetic dataset and Gulf of Mexico field dataset. The fourth phase is a conventional frequency-domain FWI, which generates an improved velocity model with correct values. The third phase is a frequency-domain FWI that uses a logarithmic wavefield the inverted velocity becomes more accurate during this step. The second phase is Laplace-Fourier-domain FWI, which generates a large- to mid-scale velocity model. The first phase is Laplace-domain FWI, which inverts the large-scale velocity model. We applied a 4-phase FWI in a sequential manner to obtain the correct velocity model when a dataset lacks low-frequency information and the starting velocity model is inaccurate. lack of low-frequency information and an inaccurate starting model), which can create obstacles to the practical application of FWI with real field data. The local minimum problem is caused by several issues (e.g. However, this approach suffers from the local minimum problem during optimisation procedures. Use Ctrl F to search the program you need HRS Hampson Russe v10 HTRI Xchanger Suite v7 SP1 exocad v2015.
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Full waveform inversion (FWI) is a method that is used to reconstruct velocity models of the subsurface. CGGVeritas (Hampson-Russell software) Transform.