WAVEFIELD DEGHOSTING OF SEISMIC DATA RECORDED USING MULTIPLE SEISMIC SOURCES AT DIFFERENT WATER DEPTHS

摘要

Seismic data are acquired by actuating a first source at a first time and oneor moreadditional seismic sources each with their own characteristic times withrespect to atime of signal recording, the sources substantially collocated and atdifferent depths.A first wavefield is determined that would occur if the first source wereactuated at aselected time with respect to an initiation time of the recordings and beingtimeadjusted for the water depth. One or more additional wavefields are determinedthatwould occur if the one or more additional sources were each actuated at saidselectedtime with respect to said initiation time, and being time adjusted for waterdepths ofthe one or more additional sources. The first wavefield and the one or moreadditional wavefields are combined to determine a deghosted source wavefieldcorresponding to actuation of a single seismic energy source.