Multimode deconvolution

Robert R. Stewart

This paper suggests that multimodes or transmitted conversions between P and S seismic energy can cause degradation of seismic sections. Clear evidence of these conversions is found on VSP data. Proposed here are procedures to suppress multimoding events on both converted-wave VSP and surface seismic sections. The procedure relies on either measuring or estimating the downgoing P-to-S conversions, then deconvolving this energy.