Abstract
Our paper “AVO and Devonian reef exploration: Difficulties and possibilities” (TLE, August 1995) contained questions and suggestions about the effects of multiples on amplitude variation with offset in carbonate reef exploration. The basic question is: “How will interbed multiple reflections alter the AVO reflections from Devonian reefs as originally modeled by the Knott‐Zoeppritz equations?” Due to the difficulty and importance of Devonian reef exploration, we believe that the effect of multiples on AVO in carbonates deserves further attention. We have investigated AVO effects using more well logs and seismic data from various Alberta reef plays in order to test our preliminary conclusions, and we compare reflection models of “primaries only” with those of “primaries plus multiples.” For investigations on real data, our attention then focused on whether the AVO effects of range‐limited stacks reflects the behavior of “primaries only” or “primaries plus multiples” models.
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