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Patent
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G01V 1/40 (2006.01) E21B 47/12 (2006.01) G01V 1/44 (2006.01) G01V 11/00 (2006.01)
Patent
CA 1091797
ABSTRACT OF THE DISCLOSURE A techniqu for producing measurements of physical characteristics of subsurface media near a borehole penetrating the earth is disclosed that uses multiple transducers positioned along a borehole tool. A number of transducers of a first type, such as transmitters, are separated from each other along the tool by a preselected separation, and a number of transducers of a second type, such as receivers, are separated from each other by the same separation and are positioned on the tool at a preselected distance from the transducers of the first type. The technique contemplates the use of appropriate circuitry for producing measurements, using different combinations of trans- ducers, of physical characteristics of the subsurface media at different positions along the borehole. Furthermore, different combinations of measurements produced at different borehole positions may be compared or combined to produce improved measurements that are compensated for borehole effects and other errors.
276162
Schlumberger Canada Limited
Smart & Biggar
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