Schlumberger

Technical Paper: Simultaneous Inversion of Multicomponent Data in the Campos Basin, Offshore Brazil

Society: IBP
Paper Number: 2756
Presentation Date: 2010
 

Abstract

Using 2D-3C seismic data in the Albacora block, Campos Basin, Brazil, we analyzed the potential of using multicomponent data for density estimation by simultaneously inverting prestack compressional and mode converted seismic data. Initial forward modeling using the available well logs shows that small changes in density at the reservoir level affects more the PS reflectivity. The inversion engine utilizes a global optimization algorithm with a non-linear cost function to simultaneously invert a number of input stacks to an earth model. Inverting solely PP data has shown a lower correlation between the estimated density and the measured log in comparison to jointly inverting both PP and PS data. The results also show that adding PS information in the inversion process improves the density inversion bandwidth, and consequently, inversion resolution.

Technical Paper presented at 15th Rio Oil & Gas Conference, held on
Sep 13-16th, 2010 at Rio Centro/RJ.

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