ABSTRACT

A generalization of principal component analysis produces a pair of seismic attributes which uniquely maximize and minimize seismic anomaly strength with respect to the background. We call this approach “Generalized Orthogonal Attributes”. Whereas principal component analysis will orthogonalize the background seismic, the method of Generalized Orthogonal Attributes will simultaneously orthogonalize both the seismic background and the anomaly. The introduction of this method is timely given the current industry drive to develop methods that focus on subtle lithologic anomalies in unconventional reservoirs rather than conventional fluid anomalies. The method is also applicable to fluid and lithology responses other than Class III, , where traditional principal component analysis has been less effective.

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