Electro-magnetic acoustic measurements combined with...

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging

Reexamination Certificate

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C367S086000, C073S152050, C073S152060, C073S152080

Reexamination Certificate

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07813219

ABSTRACT:
A method and apparatus for assessing the permeability of a subterranean formation and the hydrocarbon and/or water content of the formation. The method includes emitting an acoustic signal, such as a Stoneley wave into the formation and sending an electro-magnetic pulse into the formation. An analysis of the response of the Stoneley wave in conjunction with an analysis of a measurement of the electrical potential within the wellbore provides information pertinent to permeability and fluid composition.

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