Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Patent
1993-01-27
1995-06-20
O'Shea, Sandra L.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
324373, G01V 320
Patent
active
054263689
ABSTRACT:
A logging method and apparatus for investigating the geometrical characteristics of a borehole comprises an array of circumferentially spaced apart azimuthal current electrodes (Aaz.sub.i) disposed on a sonde (21), and an annular current electrode (A) longitudinally spaced apart from the array of azimuthal electrodes. In a method of investigating the geometrical characteristics of the borehole, currents (Ic.sub.i) are emitted between the azimuthal electrodes and the annular electrode (A). Monitor electrodes (M, Maz.sub.i) are respectively associated with the current electrodes (A, Aaz.sub.i). The potential differences (Vc.sub.i) between annular monitor electrodes (MAz.sub.i) are detected. In response to the detected potential differences, output signals (Rc.sub.i) are generated indicative of the distances between the sonde and the wall of the borehole in a plurality of directions around the sonde. The technique can be applied to azimuthal resistivity measurements of earth formations for correcting said measurements for sonde eccentring and/or the irregular shape of the section of the borehole.
REFERENCES:
patent: 3065405 (1962-11-01), Jarrett
patent: 3388325 (1968-06-01), Birdwell et al.
patent: 3772589 (1973-11-01), Scholberg
patent: 4087740 (1978-05-01), Suau
patent: 4251921 (1981-02-01), Fink
patent: 4286217 (1981-08-01), Planche et al.
patent: 4827457 (1989-05-01), Seeman et al.
patent: 5012193 (1991-04-01), Chen
Benimeli Dominique
Davies Dylan H.
Smits Jan W.
Tabanou Jacque R.
Edmonds Warren S.
Hyden Martin D.
O'Shea Sandra L.
Pojunas Leonard W.
Schlumberger Technology Corporation
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