Determination of the porosity and permeability of a geological f

Details Determination of the porosity and permeability of a geological f Determination of the porosity and permeability of a geological f

1996-01-11

1997-11-18

Williams, Hezron E.

Measuring and testing

Borehole or drilling

Formation logging

7315218, 7315232, 7315224, 73 38, 324338, 324353, 324351, F21B 4900, G01V 0326, G01V 1100

Patent

active

056890680

ABSTRACT:
The porosity and permeability of a geological formation (2) are determined on the basis of an electrofiltering phenomenon by exploiting the existence of non-linear electrofiltering phenomena. One or two pressure generators (11 ) are used to propagate a pressure wave in the formation. Electrodes (14, 15) applied against the wall of the formation pick up the electric response of the formation. The detection of a resonance frequency or a phase shift corresponding to an extremum of the electric response of the formation makes it possible to calculate the porosity or permeability of the formation or find their values from charts.

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Pride, et al., "Electrokinetic Dissipation Induced by Seismic Waves," Geophysics-vol. 6(7), pp. 914-925 (1991).

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