A multicomponent walkaway VSP data was processed to study the AVO response. Inversion and AVO modeling were conducted on PP wave data. The data show a Class I AVO response at the top of reservoir and a Class IV water-sand AVO response at the bottom of the study reservoir. There were no obvious gas effects in the study interval. The observations were validated by production data. Post stack PP-PS joint inversion was completed and compared to only P-wave inversion. Overall, they showed good consistency and the joint inversion added value to lithology prediction and fluid identification. This case study demonstrated that the multicomponent VSP is an effective tool to predict rock properties, characterize the reservoir and monitor production.
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