Geostatistics for Geophysicists
Posted by GEOVARIANCES on Tuesday, April 03, 2012
Start Date Monday, November 12, 2012
End Date Friday, November 16, 2012
Geovariances, Avon-77, France
Learn how to enhance the quality of your seismic data to get consistent and reliable velocity volumes
Geostatistics has become a key tool in geophysics, due to its proven added value for various tasks: seismic data quality control, noise filtering, velocity modeling, time to depth conversion, uncertainty quantification. This course provides a sound understanding of the geostatistical solutions relevant to accomplish these tasks.
Fundamentals of geostatistics. Interpretation of variograms in relationship with the geology. Criteria of data quality. Kriging for 2D/3D data. Factorial kriging and application to the filtering of artefacts, comparison of different surveys. Correlation between wells and seismic (TVD, TWT and velocities) and relevant methods for geostatistical depth conversion.To ensure a proper understanding of the concepts, 50% of the time is allotted to practical illustrations and exercises on real cases using ISATIS software.
Who should attend
Geophysicists involved in data interpretation and mapping of surfaces limiting the reservoirs. No prior knowledge about geostatistics is required.
- Overview of geostatistics and its main methods
- Variogram analysis and kriging of velocity data
- Quality Control of seismic data
- Filtering acquisition artefacts using kriging
- Multivariate geostatistics and cokriging. Factorial Cokriging. Application on merging different seismic surveys
- The problematic of time to depth conversion: time interpretation, evaluation of the information on velocities and standard models. Integration of wells and seismic data for time to depth conversion
- 3D seismic data processing: calibration of velocity from stacking velocity cube
- Introduction to stochastic simulation for assessing uncertainties during velocity modeling, depth conversion and volumetrics.