Patent ID: 8538700

Claim:
A computer-implemented method for assigning a saturation and wettability or related parameter to a subvolume of formation located between two or more boreholes, said method comprising the steps of: using an EM survey to obtain measurements of resistivity at said subvolume; obtaining further parameters determining a relation between resistivity and saturation from logging measurements from a logging tool along said two or more boreholes; obtaining a geological measurement defining geological or rock-type boundaries within said formation between said two or more boreholes; selecting said subvolume such that it is intersected by said geological or rock-type boundaries; transforming said resistivity measurements into said saturation at said subvolume wherein the step of transforming the resistivity measurements into the saturation at the subvolume includes extra- or intrapolating parameters measured at one or more wellbores to the location of said subvolume using knowledge of the layer boundaries in the formation; and using said saturation and/or said further parameters to determine said wettability or related parameter for said subvolume.