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3D Prestack Beam Migration with Compensation for Frequency Dependent Absorption and DispersionNormal access

Authors: Y. Xie, C. Notfors, J. Sun, K. Xin, A. Biswal and M. Balasubramaniam
Event name: 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010
Session: Migration Theory (EAGE)
Publication date: 14 June 2010
DOI: 10.3997/2214-4609.201400668
Organisations: SPE, EAGE
Language: English
Info: Extended abstract, PDF ( 625.16Kb )
Price: € 20

Spatial variations in the transmission properties of the overburden cause seismic amplitude attenuation, wavelet phase distortion and seismic resolution reduction on deeper horizons. This poses problems for the seismic interpretation, tying of migration images with well-log data and AVO analysis. We developed an efficient prestack beam Q migration approach to compensate for the frequency dependent dissipation effects in the migration process. A 3D tomographic amplitude inversion approach may be used for the estimation of absorption model. Examples show that the method can mitigate these frequency dependent dissipation effects caused by transmission anomalies and should be considered as one of the processes for amplitude preserving processing that is important for AVO analysis when transmission anomalies are present.

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