Imaging blended vertical seismic profiling data using full-wavefield migration in the common-receiver domain

For vertical-seismic-profiling (VSP) measurements, the use of blended acquisition, with time-overlapping shot records, can greatly reduce the downtime and, thereby, provide large cost savings. For directly imaging blended VSP measurements, we have used full-wavefield migration (FWM). FWM is an inversion-based imaging scheme that enables us to...

A new optimization approach for source-encoding full-waveform inversion

Waveform inversion is the method of choice for determining a highly heterogeneous subsurface structure. However, conventional waveform inversion requires that the wavefield for each source is computed separately. This makes it very expensive for realistic 3D seismic surveys. Source-encoding waveform inversion, in which the sources are modeled...

Modeling and inversion of Scholte waves in shallow water for varying acquisition parameters

On land, surface waves are extensively and successfully used for the determination of Shear velocity profile (MASW). From those, the stiffness of the subsurface within 20-30 m can be derived, useful especially for engineering purposes. This technique can be effectively applied also to shallow marine environments: surface waves ex- cited by air...