Gamma-Ray Absorption Instrument for Determining Fluid Saturation of Cores

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Abstract
An instrument is described for measuring fluid saturation in cores by means of gamma‐ray absorption. Results of this technique are compared with those from electrical resistance measurements. Good agreement is found for gas‐liquid systems under conditions of comparatively slow saturation change. For rapidly moving fronts the instrument responds quickly to the arrival of a saturation gradient, but does not give an accurate measure of saturation in the region of the front.

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