G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 3/38 (2006.01) E21B 49/00 (2006.01) G01V 3/18 (2006.01) G01V 13/00 (2006.01)
Patent
CA 2488144
A method for determining a sonde error in a logging tool comprising a transverse array includes obtaining a first measurement using the transverse array while the logging tool is at a first height from ground in a selected orientation; obtaining a second measurement using the transverse array while the logging tool is at a second height from the ground in the selected orientation; deriving a difference measurement from the first measurement and the second measurement; determining a background signal using the difference measurement and a predetermined function, wherein the predetermined function relates earth signals in a plurality of signals obtained at the second height to a plurality of difference signals between signals obtained at the first height and the second height at a plurality of formation conductivities; and determining the sonde error by subtracting the background signal from the second measurement.
Barber Thomas D.
Wang Hanming
Schlumberger Canada Limited
Smart & Biggar
LandOfFree
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