oa A Trace-by-Trace Iterative VSP Wavefield Separation Method

To improve the precision of popular VSP wavefield separation method, we propose a trace-by-trace iterative VSP wavefield separation method (TISM) based on the gradually changing characteristics of VSP data in adjacent traces, cross-correlation, and high-precision iterative VSP wavefield separation. TISM includes the flowchart of target trace guided sub VSP dataset automatic generation (TWG), cross-correlation guided VSP wavefield optimization (CWO), and cross-correlation guided VSP wavefield separation result optimization (CRO). TISM can process the adjacent traces by TWG, obtain high-precision wavefield alignment (or flattening) sub VSP datasets for scalar wavefield separation by CWO, and obtain high-precision wavefield separation result for the target trace by CRO. Actual VSP data applications demonstrate that TISM has great potential in VSP wavefield separation.