The limitations of using low-frequency 3-D seismic data for detailed reservoir characterization are well recognized. Nonetheless, these data are very well suited for quantitative estimates of the net-to-gross (N/G), which is a reservoir scale property critical in deepwater turbidite reservoir characterization and development projects. The acoustic impedance inversion of 3–D seismic has been routinely used with varying success to estimate N/G in many clastic reservoirs. Indeed, when the shale baseline impedance can be estimated, the departure from this trend can be argued to represent a certain measure of the hydrocarbon-saturated sand volume on the reservoir scale. We take this technique...

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