Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Reexamination Certificate
2005-01-11
2005-01-11
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Earth science
C324S353000
Reexamination Certificate
active
06842697
ABSTRACT:
A method and apparatus for measuring the properties such as permeability of the rock surrounding a borehole in which a directional seismic or sonic signal is generated downhole and propagated into the surrounding formation to generate an electrokinetic signal and the focus of the seismic signal is moved in three dimensions in the surrounding rock by physically moving the source or by having two seismic sources which generate oscillating seismic signals at different frequencies and the focus of the seismic signal is varied by wave interference or wave interaction.
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“Electroseismic Technique for Measuring the Properties of Rock Surrounding a Borehole”, Millar et al., WO 97/14980, Apr. 24, 1997.*
Geophysical Applications of Electro Kinetic Conversion By A.H. Thompson And G.A. Gist Exxon Production Research Company Houston, Texas.
A Study Of The Influence Of Moisture On The Magnitude Of The Seismoelectric Effect In Sedimentary Rocks By A Laboratory Method E.I. Parkomenko And Chzhao Tsze-San (Chao Chien San).
International Search Report, PCT/GB 98 02234, Dec. 15, 1998, 3 pp.
Clarke Richard Hedley
Millar John William Aiden
Stuart-Bruges William Peter
Bartlett & Sherer
Groundflow Ltd.
Le Toan M.
Sherer Ronald B.
Sondex Ltd.
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