Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate
2007-06-05
2007-06-05
Patidar, Jay M. (Department: 2862)
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
C324S338000, C324S333000
Reexamination Certificate
active
10957415
ABSTRACT:
Disclosed herein are methods and apparatus using one or more toroids to measure formation anisotropy and/or vertical conductivity. In one embodiment, a disclosed method comprises: inducing a current to flow through a conductive surface of a tool body into a surrounding formation; measuring a lateral portion of the current flow; and calculating an anisotropy coefficient from the apparent conductivity so measured. The lateral current flow may be that portion of the current flowing through the tool body surface between two predetermined, axially spaced, circumferences of the tool. In an alternative embodiment, a disclosed logging tool comprises: a substantially cylindrical and conductive tool body, a toroidal transmitter, and a current measuring means. The current measuring means is configured to measure that portion of an induced current that radiates through a predetermined surface of the tool into the formation.
REFERENCES:
patent: 3007107 (1961-10-01), Gondouin
patent: 3079550 (1963-02-01), Huddleston, Jr. et al.
patent: 4302722 (1981-11-01), Gianzero
patent: 4302723 (1981-11-01), Moran
patent: 4553097 (1985-11-01), Clark
patent: 4626785 (1986-12-01), Hagiwara
patent: 5045795 (1991-09-01), Gianzero et al.
patent: 5235285 (1993-08-01), Clark
patent: 5339036 (1994-08-01), Clark et al.
patent: 5510712 (1996-04-01), Sezginer et al.
patent: 5966013 (1999-10-01), Hagiwara
patent: 6057784 (2000-05-01), Schaaf et al.
patent: 6064210 (2000-05-01), Sinclair
patent: 6181138 (2001-01-01), Hagiwara et al.
patent: 0 527 089 (1993-02-01), None
patent: 0 869 376 (1998-07-01), None
patent: WO 00 50926 (2000-08-01), None
Moran, J. H. and Gianzero, S., 1979, Effects of formation anisotropy of resistivity-logging measurements: Geophysics, 44, pp. 1273.
Kuntz, K., and Moran, J. H., S., 1962, Basic theory of induction logging and application to study two-coil sondes: Geophysics, 27, pp. 829-858.
Kuntz, K., and Moran, J. H., S., 1958, Some effects of formation anisotropy on resistivity measurements in boreholes: Geophysics, 23, pp. 770-794.
Moran, J. H. and Gianzero, S., 1979, Effects of formation anisotropy of resistivity-logging measurements: Geophysics, 44, pp. 1276.
Chemali, R., Gianzero, S. and S.M. Su, 1987, The effect of shale anisotropy on focused resistivity devices: SPWLA 28th Ann. Logging Symp., paper H.
Anderson, B. et al., 1990, Response of 2-MHz LWD resistivity and wireline induction tools in dipping beds and laminated formations: SPWLA 31st Ann. Logging Symp., paper A.
Luling, M. et al., 1994, Processing and modeling 2-MHz resistivity tools in dipping laminated, anisotropic formations: SPWLA 35th Ann. Logging Symp., paper QQ.
Hagiwara, T., 1995, Induction log analysis of thinly laminated sand/shale formation: SPE Formation Evaluation, June, pp. 86-90.
Hagiwara, T., 1996, EM log response to anisotropic resistivity in thinly laminated formations with emphasis on 2-MHz resistivity devices: SPE Formation Evaluation, December, pp. 211-217.
Tabarovsky, L., Epov, M., and Kagansky, A., 1977, Focusing systems of inductance logging in anisotropic media: Geol. i Geofiz, No. 9.
Xiao, J., Beard, D., and Zhou, Q., 1996, A practical dipping-effect correction for multiarray induction tools in deviated wells; SPWLA 37th Ann. Logging Symp., paper R.
Gianzero, S., 1999, The paradox of anisotropy revisited: The Log Analyst, vol. 40, No. 6, pp. 485-491.
Gianzero, S. et al., 1985, A new resistivity tool for measurement-while-drilling: SPWLA 26th Ann. Logging Symp., paper A.
Kriegshauser, B. et al., 2000, A new multicomponent induction logging tool to resolve anisotropic formations: SPWLA 41st Ann Logging Symp., Paper D.
British Search Report dated Jan. 28, 2003, Application No. GB 0214674.4 (2 p.).
French Search Report dated Feb. 21, 2003, Application No. FA 620652 (2 p.).
Bittar Michael S.
Gianzero Stanley C.
Conley Rose PC
Patidar Jay M.
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