METHOD AND APPARATUS FOR PROCESSING SEISMIC DATA

摘要

A method of processing acoustic data acquired at a receiver comprises processing the acoustic data to obtain a down-going component of a parameter of the acquired acoustic data. The parameter may be, for example, the pressure acquired at the receiver or the vertical component of particle motion acquired at the receiver. The direct arrival at the receiver of acoustic energy emitted by a source may be identified in the down-going component of the parameter. Alternatively, the down-going component may be further processed to obtain a further parameter of the seismic data and the direct arrival may be identified in the further parameter. The further parameter may be, for example, the direct arrival wavefield S which may be found using S = D+ZU where D and U are the up-going and down-going components of a parameter of the acquired data, and Z is a ghost operator. Applications for the invention include seismic surveying and acoustic range-finding.