Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate
2011-03-01
2011-03-01
Patidar, Jay M (Department: 2858)
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
Reexamination Certificate
active
07898260
ABSTRACT:
An apparatus, method and computer-readable medium for evaluating an earth formation are disclosed. A logging tool which has two coplanar antennas disposed at a known distance from an axis of the logging tool is conveyed into a borehole. The presence of a borehole effect is determined from a difference between outputs of the two antennas. The borehole effect may include eccentering of the logging tool in the borehole. Measurements made by an additional antenna and/or the two coplanar antennas may be corrected for the effects of eccentering. Horizontal and vertical formation resistivity as well as additional petrophysical properties may be determined.
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J. H. Moran et al., Basic Theory of Induction Logging and Application to Study of Two-Coil Sondes, Geophysics, vol. XXVII, No. 6, Part 1 (Dec. 1962), pp. 829-858.
Gold Randy
Pelegri Luis M.
Baker Hughes Incorporated
Mossman Kumar & Tyler PC
Patidar Jay M
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