Technical Paper: A reservoir characterization study in the Burgos Basin including simultaneous prestack inversion and lithology prediction

Society: SEG
Paper Number:
Presentation Date: 2009
 

In this paper, we present a reservoir characterization study in the Burgos Basin, onshore northeastern Mexico which includes a spatial lithology distribution based on lithoclasses generated using rock physics and Bayesian statistics. The lithology prediction is preceded by prestack simultaneous AVO inversion. The method of inversion is based on simulated annealing and composed of a globally optimized algorithm which simultaneously inverts a number of angle stacks and their corresponding wavelets. The outputs include volumes of acoustic and shear impedances as well as Vp/Vs ratio. The study was carried out in order to determine the lateral extent of the producing gas-saturated sand which has been penetrated twice successfully based solely on seismic amplitudes. The characterization work performed using well log data and the inverted volumes has enabled accurate mapping of pay sands in the study area and refined the prediction of future drilling targets.

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