At SEG's 1998 Annual Meeting in New Orleans, Ali Tura and I organized a workshop titled “Can P-wave AVO be quantitative or do we need multicomponent data?” At the end of the workshop, after an afternoon of talks and debates, we asked the audience to vote for either approach. Not surprisingly, the raised hands showed an almost perfect 50–50 split. This controversial issue is still not settled and, if this year's SEG convention is any indication, the debate is alive and well. The success of AVO and direct hydrocarbon indicators (DHIs) in finding oil and gas has been firmly...

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