We present a heuristic method of delineating reservoir regions with favorable production potential for well placement. The method uses basic concepts of proxy formulation for well productivity to relate the production potential of a well placed in any region in the reservoir, to the basic properties of that region (petrophysical, dynamic, geometrical). These properties may be readily obtained from any history-matched or data-conditioned reservoir model. Therefore, a productivity potential map for the reservoir can be easily generated. Also, the relevant properties relate to parameters measurable in an LWD operation. We use this technique to simulate the impact of alternate steering strategies on well path and productivity. This requires a fine-scale model of the region designated for drilling (i.e., model prior to upscaling). The influence of additional LWD measurements on reservoir trajectory and expected well performance can therefore be assessed with this technique (e.g., impact of NMR-derived permeability). We also examine how this method may be applied when multiple geological scenarios are conceivable for the area targeted for drilling. We apply a simple technique for model aggregation that proves effective in identifying drainage areas that are optimum or near-optimum in an overall sense. Therefore, a well placed in the region identified by the aggregate model shows a performance with respect to the underlying geological models that is best or not far from it.

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