Method for determining oil saturation in a subsurface formation

Details Method for determining oil saturation in a subsurface formation Method for determining oil saturation in a subsurface formation

E - Fixed Constructions

21

B

166/3

E21B 47/06 (2006.01) G01V 11/00 (2006.01)

Patent

CA 1217715

METHOD FOR DETERMINING OIL SATURATION IN A SUBSURFACE FORMATION ABSTRACT A borehole logging system includes a borehole gravity meter and a resistivity logging tool. A borehole gravity log and a resistivity log are produced over a selected depth interval in a borehole. The bulk density of the subsurface formation surrounding the borehole over the selected depth interval is measured from the gravity log. The bulk resistivity of the formation surrounding the borehole over the selected depth interval is measured from the resistivity log. The bulk density and bulk resistivity measurements are combined to derive a measurement of the residual oil saturation of the subsurface formation surrounding the borehole for the selected depth interval.

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