Complex Imaging using WAZ data
S. Kapoor, D. Vigh, N. Moldoveanu, W. Dragoset and H. Li
Event name: EAGE Subsalt Imaging Workshop Cairo 2009
Session: Case Studies (Morning Session)
Publication date: 15 November 2009
Info: Extended abstract, PDF ( 1022.1Kb )
Price: € 20
The past couple of years have seen a tremendous increase in the acquisition of wide azimuth (WAZ) surveys that provide improved subsalt imaging. We have seen a step change improvement in image quality compared to conventional narrow azimuth (NAZ) surveys, even when using minimal processing and existing, conventional-survey velocity models. The improvement in image quality is taken to the next level when the wide azimuth data are combined with other seismic and non-seismic measurements to build ever more highly constrained models, and then more accurately migrated with two-way wave-equation methods. In this presentation we will show examples of WAZ data processed with the latest technology such as true azimuth 3D multiple attenuation using the general surface multiple prediction (GSMP), wave equation based multiple attenuation (WEM MOD) and reverse time migration (RTM). We will also discuss development of our next generation of velocity model building tools and techniques such as full waveform inversion (FWI).