Refraction interferometry for residual statics solutions

Summary Refraction traveltimes have long been applied for deriving long-wavelength statics solutions. They are also applied for deriving residual statics, but it requires providing with substantially accurate traveltime picks for the calculation. In this study, we present a residual statics method that applies interferometric theory to produce four stacked super-virtual refraction gathers with significantly improved signal-to-noise ratio. They include forward and backward super-virtual refraction gathers for receivers and shots. Picking first arrivals on these four gathers followed by applying a set of equations is able to derive reliable residual statics solutions. This approach can help dealing with noisy data and also avoid using traveltime picks from shot gathers. We demonstrate the approach by applying to synthetic data as well as real data.