G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 3/14 (2006.01) G01R 33/44 (2006.01) G01V 3/08 (2006.01) G01V 3/32 (2006.01)
Patent
CA 2286240
The present invention is directed to a method for computing a distribution of spin-spin relaxation times. The spin-echo amplitudes are obtained by hardware integration of the receiver voltages over a time window. A linear operator is utilized to map a relaxation-time distribution to spin-echoes, produce a singular value decomposition (SVD) of the linear operator, determine vectors of the SVD, and compress the spin-echo data using the vectors. To eliminate a telemetry bottleneck, the T2 spectrum is computed downhole and transmitted to the surface.
Dworak Roger A.
Heidler Ralf
Luong Bruno
Poitzsch Martin E.
Schlumberger Canada Limited
Smart & Biggar
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