Method and apparatus for evaluating and/or measuring the...

E - Fixed Constructions – 21 – B

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E21B 49/00 (2006.01) G01N 15/08 (2006.01) G01V 3/26 (2006.01)

Patent

CA 2142928

The method and the apparatus of the invention are characterized essentially by the fact that for a rock formation 100 that already contains fluid in its interstices, means 1 are provided for imparting motion to the fluid relative to the rock formation 100, and the magnetic fields created by the relative motion of the fluid in the rock formation is measured and the permeability of the rock formation is deduced from the measurement. The present invention is particularly applicable to in situ measurement of the permeability of rocks, e.g. down an oil well.

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