E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 49/00 (2006.01) G01V 3/28 (2006.01)
Patent
CA 2396900
A method is disclosed for the determination of the dip angle of anisotropic earth formations surrounding a wellbore. Electromagnetic couplings among a plural of triad transmitters and triad receivers are measured. Each triad transmitter/receiver consists of coil windings in three mutually orthogonal ayes. The transmitter coils and receiver coils are oriented such that mutually symmetrical transmitter pairs or mutually symmetrical receiver pairs are equidistant from a centrally located receiver or transmitter, respectively. The measured signals from the created couplings are used to generate initial separate estimates of the dip angle of the formation. The two discrete determinations of dip angle are then averaged to arrive at a more accurate estimate that approaches the true dip angle in the formation.
Gao Li
Gianzero Stanley C.
Sanmartin Luis
Emery Jamieson Llp
Halliburton Energy Services Inc.
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