Nmr measurement on frozen cores

Details Nmr measurement on frozen cores Nmr measurement on frozen cores

G - Physics

01

R

324/1

G01R 33/20 (2006.01)

Patent

CA 1219905

ABSTRACT A method of evaluating geologic rock samples and particularly sandstone. The sample is saturated with fresh water and the temperature of the sample is reduced to a temperature below the freezing point of the fresh water. As the sample is warmed, nuclear magnetic reso- nance measurements are made at just below 0°C and again at about the operating temperature of the NMR probe, i.e., about 32°C. The portion of the water within the sample that can be considered to be residual water can be deter- mined from the relationship of NMR measurements taken at just below 0°C and at the temperature of the probe.

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