CRSplus regularisation of land data acquisition

The Common Reflection Surface (CRS) method provides a new strategy to map land data to a user-defined regular shot-receiver layout. Land data acquisition commonly deviates from the nominal acquisition layout due to limited access in the survey area. For such data, the CRS method already has a proven record of successful trace interpolation and regularisation based on CRS wavefield attributes. Previous applications, however, tended to balance the subsurface fold via CMP-offset regularisation, while the new CRSplus strategy regularizes the surface acquisition layout. This is especially beneficial for shot migration methods that work on regular horizontal grids. Depth imaging in a CRSplus RTM workflow has shown a decrease of numerical noise and improved resolution due to the regularized surface locations of the data.