An image-focusing semblance functional for velocity analysis

Conclusions

Image-focusing analysis can provide useful velocity information, in particular in areas where conventional velocity analysis lacks resolution. Measuring image coherency across the structural-dip axes provides quantitative information on image focusing. However, in the presence of curved reflectors coherency across dips suffers similar shortcomings as conventional minimum entropy functional. To overcome these difficulties, I propose to perform image-focusing analysis by measuring image coherency simultaneously across structural dips and reflection aperture/azimuth angles. The application of the proposed image-focusing semblance to two synthetic data sets demonstrates its potential as a tool to extract quantitative velocity information from image-focusing analysis.