Geostatistical Stochastic Inversion
GeoSI is a pre-stack simultaneous elastic inversion which generates high-frequency stochastic models for high-resolution reservoir characterization and uncertainty analysis. It addresses the band-limited nature of deterministic inversion methods and integrates well data and seismic data at a fine scale within a stratigraphic geo-model framework.
GeoSI is part of the StrataVista seismic reservoir characterization platform.
A single stochastic realization of P-Impedance from GeoSI (above) displays resolution approaching that of the well log data. The resolution of the equivalent deterministic inversion is limited to the seismic bandwidth. The seismic near-stack image is shown along with a P-Impedance well log for comparison.
FEATURES
- High-frequency stochastic results
- Multiple realizations for uncertainty analysis
- Extensive conditioning and spatial constraint options:
- Fine-scale conditioning with well data
- Layer-dependent anisotropic variograms
- Trace-dependent S/N spatial control
- Scalable, parallel solution for large datasets.
BENEFITS
- Increased resolution integrating well and seismic data
- Supports cascaded reservoir property simulation
- Risk/uncertainty analysis using probability cubes
- Stratigraphic framework facilitates interpretation and reservoir simulation
- Extensive CGGVeritas reservoir-oriented processing experience
The multiple high-resolution realizations generated by GeoSI can be used in a lithology simulation workflow, cascaded from the inversion. This workflow maximizes the full potential of the stochastic inversion approach. It reduces the risk associated with interpretation and leads to more accurate assessment of potential reserves.
