1887

Abstract

Full waveform inversion (FWI) provides a powerful mechanism for building complex seismic velocity models, with the potential to resolve high-resolution structure. FWI methods generally operate on a gridded representation of a seismic velocity model. However, many models used in FWI contain complex bodies (e.g. salt intrusions) that generate a large, sharp contrast in seismic properties. Refining these with FWI can prove extremely difficult when they are represented implicitly within a gridded velocity model. The constraints on model updates required at surfaces to optimise convergence are different from those required elsewhere. It is difficult to account for this difference correctly when the surfaces have no separate representation. The method described in this paper maps full waveform inversion model updates for seismic parameters to updates in the position and shape of surfaces within a 3-D model. This allows surfaces to be represented, refined and constrained explicitly during waveform inversion. The link between structural and gridded models allows ray-based constraints from tomography to be incorporated directly as constraints in FWI to increase the stability and improve the convergence of the inversion process.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.20148435
2012-06-04
2024-03-28
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20148435
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error