G - Physics – 01 – V
Patent
G - Physics
01
V
324/12
G01V 3/24 (2006.01) G01V 3/28 (2006.01)
Patent
CA 2032862
High resolution induction logs (28) are obtained through borehole casing (15) by magnetically saturating the casing (15), logging with a tool (10) having different transmitter (35a, 35b)-to-receiver (40) coil spacings, and determining the formation (30) conductivities as a function of the coil spacings, coil frequency, and phase difference between the signals at these spacings. The logging is preferably done at an intermediate frequency which gives good resolution but is little affected by the saturated casing.
Chemali Roland E.
Gianzero Stanley C.
Sinclair Paul
Su Shey-Min
Chemali Roland E.
Gianzero Stanley C.
Halliburton Logging Services Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Sinclair Paul
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