MINIMUM-PHASE SWEEP SIGNAL FOR PHASE CONTROLLED VIBROSEIS ACQUISITION

The recent development of vibrator electronics allows generating a family of comprehensive sweep signals including phase controlled sweeps. Standard vibroseis acquisition outputs zero phase signals in correlated traces, which require feather mathematical conversion to minimum phase in order to agree with assumption of minimum phase earth response. In proposed method, vibrator controller calculates the minimum phase equivalent of the any desired reference sweep and then emits it to the subsurface. Recorded subsurface response is then correlated with original unchanged reference sweep. Output is minimum phase signal gathers, which are ready for standard processing with minimum phase deconvolution application. This paper demonstrates advantage of direct minimum-phase controlled sweep acquisition to standard acquisition followed by minimum-phase conversion signal processing. © EAGE Conference and Exhibition 2021.All right reserved.