NORSAR’s main objective in seismic modelling in the past has been to develop methods and tools for simulation of wave propagation and seismic respons in complex 3D geological structures. Hence, the classical application of NORSAR technology has been forward modelling, such as simulation and planning of 3D seismic surveys, synthetic data generation, interpretation support, hypothesis testing, and feasibility studies. To day’s research within seismic modelling has moved further to model based imaging, elastic inversion, rock physics inversion, and 4D inverse analysis.
Advanced and robust inversion techniques require correspondingly good forward techniques. Our intention is to develop a complete integrated modelling based framework where the user can start either in the prestack, migrated, or model domain, and go back and forth between the domains for a given local target volume of the subsurface in a consistent and efficient way. Some key issues of the system will be
- including important physical wave propagation effects, like
- anisotropy
- S-waves (multi-component)
- A priory geological and geophysical constraints
- improved imaging with true amplitude
- sharper images (better lateral and vertical resolution)
- more correct structural location in depth
- quantitative interpretation for direct estimation of reservoir parameters (rock inversion)
- optimized 4D analysis and production of the field
Illustration of the integrated local modelling and inversion concept. Focusing
on a local target volume of e. g. a reservoir zone, a number of modelling based forward/imaging/inversion workflows will provide the user to perform a
consistent and well understood analysis (Insight through modelling …).
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