Vector-acoustic Reverse-time Migration of Volve OBC Dataset without Up/Down Decomposed Wavefields

Matteo Ravasi, Ivan Vasconcelos, Andrew Curtis, A Kritski

Research output: Contribution to conferencePaperpeer-review

Abstract

Wavefield separation based on the combination of pressure and particle velocity data is generally used to extract the up- and down-going components from multi-component seabed or towed marine seismic recordings prior to imaging. By carefully combining vector-acoustic (VA) data in the extrapolation of shot
gathers in reverse-time migration (RTM) we show that wavefield separation (deghosting) can be performed ‘on-the-fly’ at no extra cost. We call such a strategy VARTM and we successfully apply it to a North Sea OBC field dataset, acquired in the Volve field. We also discuss additional advantages of
VARTM over standard RTM of up-going only waves such as improved handling of directivity information contained in the acquired vector-acoustic data for clearer shallow sections and imaging of the down-going component of the recorded field (mirror VARTM) without the need for an additional finite difference modelling.
Original languageEnglish
Publication statusPublished - 2014
EventSecond EAGE/SBGf Workshop 2014 Broadband Seismic - Rio de Janeiro, Brazil
Duration: 4 Nov 20145 Nov 2014

Workshop

WorkshopSecond EAGE/SBGf Workshop 2014 Broadband Seismic
Country/TerritoryBrazil
CityRio de Janeiro
Period4/11/145/11/14

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