Methods for determining in situ the viscosity of heavy oil

Details Methods for determining in situ the viscosity of heavy oil Methods for determining in situ the viscosity of heavy oil

G - Physics

01

V

G01V 3/32 (2006.01) E21B 49/08 (2006.01)

Patent

CA 2638595

Viscosity of heavy oil is determined in situ in a formation by making nuclear magnetic resonance (NMR) measurements in the formation, and then calculating viscosity according to an equation of the form (see above formula) where T is the temperature of the heavy oil sample, .eta. is the viscosity, T2LM is the logarithmic mean of the T2 distribution spectrum of the sample, and a, b, and c are non-zero constants. Typically, constant b has a value between 5 and 7 and constant c has a value between -0.7 and -0.5.

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