Determination of permeability of porous media and thickness of l

Details Determination of permeability of porous media and thickness of l Determination of permeability of porous media and thickness of l

1995-01-11

1996-04-02

Williams, Hezron E.

Measuring and testing

With fluid pressure

Porosity or permeability

73155, 324351, 324376, 324353, F21B 4900, G01V 318, G01N 1508

Patent

active

055030017

ABSTRACT:
Process and apparatus for determination of permeability of porous media and thickness of layered porous media by measurement at finite frequency of streaming potential and electro-osmotic induced voltage due to applied finite frequency pressure oscillations and alternating current, respectively. The distance between application and measurement of the alternating signals at a finite frequency is small compared to the wave length. A plurality of spaced measurement electrodes provides measurement of the penetration depth of applied pressure oscillations for determination of thickness of porous layers and to largely remove the effect due to mudcake on a borehole in streaming potential measurements.

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