Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1990-10-25
1994-11-01
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
367 48, 367 57, 364422, 324338, 324357, G01V 140, G01V 330
Patent
active
053612396
ABSTRACT:
A method for borehole compensation using a single transmitter measurement electromagnetic propagation tool is disclosed. Phase shift and attenuation are measured at each of three positions relative to a measurement depth. The measurements are used to calculate borehole compensation. The method may be used for other single transmitter tools and provides more accurate formation measurement in boreholes having high rugosity and washouts.
REFERENCES:
patent: 3208548 (1965-09-01), Levin et al.
patent: 3270316 (1966-08-01), Walker et al.
patent: 3292143 (1966-12-01), Russell
patent: 3524162 (1970-08-01), Zill
patent: 4278941 (1981-07-01), Freedman
patent: 4346460 (1982-08-01), Schuster
patent: 4626785 (1986-12-01), Hagiwara
patent: 4678997 (1987-07-01), Jones
patent: 4748415 (1988-05-01), Vail
patent: 4785247 (1988-11-01), Meador et al.
patent: 4899112 (1990-02-01), Clark et al.
Fredericks et al; "Formation Evaluation While . . . Tool"; 64th Annu SPE Tech Conf, pp. 521-536, Oct. 11, 1989, SPE-19622.
Clark et al; "Electromagnetic Propagation . . . Experiment"; 63rd Annu. SPE Tech. Conf., pp. 103-117, Oct. 5, 1988, SPE-18117.
B. Clark, M. Luling, J. Jundt, M. Ross and D. Best "A Duel Depth Resistivity Measurement for FEWD", SPWLA 29th Annual Logging Symposium, Jun. 1988--directed to a dual depth resistivity measurement tool for formation evaluation while drilling.
M. M. Wisler, "Real-Time Electromagnetic Propagation Resistivity and Memory for MWD", 11th European Formation Evaluation Symposium, Sep. 1988.--directed to a measurement while drilling tool.
Baker Hughes Incorporated
Moskowitz Nelson
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