Three-parameter velocity analysis

The paper briefly rcvicws the fundamcntals of the 3-D velocity analysis and the role it plays in a 3-D scismic data proccssing, for which a practical tcchnique called "three-parameter velocity analysis" is introduced wit b the emphasis on the difficulties cncountered in its programmin and the skills to solve them. Its good featurcs in accuracy, confidence and practicality havc been proved out by thcoretical vcrification,model cxperiments,field data processing and the correlation with well data (vclocity logging and dipmcter logging ).