Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Patent
1991-09-04
1993-06-29
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
324370, G01V 320
Patent
active
052237940
ABSTRACT:
Methods of operation of an apparatus having at least two pairs of voltage measurement electrodes vertically disposed in a cased well to measure the resistivity of adjacent geological formations from inside the cased well. During stationary measurements with the apparatus at a fixed vertical depth within the cased well, the invention herein discloses methods of operation which include a measurement step and subsequent first and second compensation steps respectively resulting in improved accuracy of measurement. First and second order errors of measurement are identified, and the measurement step and two compensation steps provide methods to substantially eliminate their influence on the results. A multiple frequency apparatus adapted to movement within the well is described which simultaneously provide the measurement and two compensation steps.
REFERENCES:
patent: 2729784 (1956-01-01), Fearon
patent: 4796186 (1989-01-01), Kaufman
patent: 4804906 (1989-02-01), Hamberg et al.
patent: 4820989 (1989-04-01), Vail, III
patent: 4882592 (1989-11-01), Vail, III
patent: 5043668 (1991-08-01), Vail, III
patent: 5043669 (1991-08-01), Vail, III
Mamedou, "Effectiveness of Resistivity Logging of Cased Wells by a Six-Electrode Device", IZV. VYSSH. Ucheb. Zavedenii. Neft Gaz No. 7, Jul. 1987, pp. 11-15.
Edmonds Warren S.
Para Magnetic Logging, Inc.
Strecker Gerard R.
LandOfFree
Methods of operation of apparatus measuring formation resistivit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods of operation of apparatus measuring formation resistivit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods of operation of apparatus measuring formation resistivit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1758270