固物研究生论坛 - Interfeometric imaging

Refraction seismic data has been conventionally processed for traveltime analysis for the purpose of resolving the near-surface velocity structures. In this study I present are fraction wavefield imaging approach that can migrate refractions from multiple refractors automatically. The approach involves preprocessing each reciprocal shot gathers and generates a number of new gathers by two loops of correlations. Migrating the resulted gathers with overburden velocities just like reflection migration can image refractors in depth. This approach does not require picking reciprocal times, and it can be applied for both shallow near-surface structure imaging with conventional recording geometry and deep subsurface imaging with long-offset recording geometry.