A new "quick-look" method for quantifying reservoir heterogeneity was developed, using data from the Cormorant Field in the Brent Province in the northern North Sea. The "Reservoir Heterogeneity- Measure" (RHM) technique is based on combining three parameters that describe sand quality (net/gross ratio, porosity and permeability), two parameters that describe geometric aspects of the reservoir (sand-body geometry and faulting) and one parameter that describes the effectiveness of reservoir compartmentalisation (fault sealing).

RHM maps combined with conventional "bubble" maps of produced volumes are of use for quick-look ranking of remaining oil targets as the RHM values for the areas of interest reflect producibility of the remaining oil volumes.

The technique should be directly applicable to other fields in the same province as well as to fields in analogous geological settings.

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