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Effective AVO crossplot modeling: A tutorial

by Christopher P. Ross
Geophysics ()

Abstract

The ability to crossplot attributes from a 3-D seis- mic volume permits a geophysicist to identify and high grade subsets of the3-Dvolume that warrant detailed in- spection. In the case of amplitude-variation-with-offset (AVO) crossplotting, the seismic attributes are derived from CDP data. Crossplotting has become a fundamen- tal process in AVO analysis, just as it is in petrophysical analysis. Comprehending the intricacies and selection of attributes is essential for successful AVO analysis and improved seismic interpretation. AVO crossplotting of modeled seismic data derived from well logs with the Biot-Gassmann equations pro- vides a basis for understanding fluid substitution ef- fects on AVO attribute interactions when crossplot- ting.With these model-based understandings, improved multi-attribute interpretation processes can commence withAVO crossplotting of seismic volumes

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