Method for determining residual oil concentration of a...

Details Method for determining residual oil concentration of a... Method for determining residual oil concentration of a...

G - Physics

01

N

358/4

G01N 23/05 (2006.01) G01V 5/10 (2006.01)

Patent

CA 1118912

Case 5883 IMPROVED METHOD FOR DETERMINING RESIDUAL OIL CONCENTRATION OF A FORMATION USING THERMAL NEUTRON DECAY MEASUREMENTS Abstract of Disclosure An improvement in the method of determining oil saturation in a subterranean formation, penetrated by a well-bore, is disclosed. In the method of determining oil concentration by measuring thermal neutron decay with a low salinity aqueous liquid in said well-bore and said formation, and measuring thermal neutron decay with a high salinity aqueous liquid in said well-bore and said forma- tion, the improvement comprises adding to said low salinity liquid in the well-bore, only, a material which adjusts the thermal neutron capture cross section of the well-bore so that it is approximately the same as the thermal neutron capture cross section of the well-bore when it contains the high salinity liquid.

326987

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