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The Leading Edge; October 2009; v. 28; no. 10; p. 1182-1190; DOI: 10.1190/1.3249772
© 2009 Society of Exploration Geophysicists
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ACQUISITION/PROCESSING

Correction for NMO stretch and differential attenuation in converted-wave data

A key enabling technology for prestack joint inversion of PP and PS data

Rishi Bansal, Vijay Khare, Tim Jenkinson, Mike Matheney and Alex Martinez

ExxonMobil Upstream Research Company

Corresponding author: rishi.bansal{at}exxonmobil.com

Abstract

In many parts of the world, P- or S-wave impedance (IP or IS or seismic velocities (VP or VS) are not good indicators of lithology. In these cases, estimation of density or VP/VS is essential for reservoir characterization. Conventional inversion of PP-mode data is known to yield IP and IS, but a reliable estimate of density requires prestack inversion of very large-angle PP data (Roy et al., 2008). Such large-angle PP data sets necessitate acquisition and true-amplitude processing of unusually large offsets.






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