Angle-dependent Tomostatics

Statics are a dynamic problem that affects most seismic surveys. The key to addressing the statics problem is an accurate estimation of near-surface velocity variability. Reflection velocity analysis is critical to meaningful CMP stacks, however a reliable velocity function depends on reflections with the trace-to-trace static variability associated with an irregular near-surface velocity. Using conventional correlation approaches the problem then becomes cyclic because the relationship between statics estimations and corrections are intertwined with reflection velocity analysis.