Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Patent
1985-07-31
1987-10-27
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
324347, 364422, G01V 318
Patent
active
047032790
ABSTRACT:
The response characteristics of a combination of hole-centered electric logging tools in a variety of borehole conditions can be obtained by means of impedance values as entries of a matrix resulting from measurements over a series of depth increments, utilizing an array of 2M-1 electrode assemblies of equal incremental spacing positioned on a rigid mandrel. While the array moves continuously along the borehole, current is continuously emitted from the centrally located current electrode allowing the impedance matrix to be formed by the principle of linear superposition in terms of voltage and voltage difference measurements between adjacent electrodes. The impedance matrix is inverted and used to generate a set of tool responses, which when properly compared to a set of tool responses previously generated by computer simulation and addressable by sets of borehole parameters and calibration factors, allows the corresponding borehole conditions to be deduced from the measured data.
REFERENCES:
patent: 3076138 (1963-01-01), Stelzer
patent: 3256480 (1966-06-01), Runge et al.
patent: 3457499 (1969-07-01), Tanguy
patent: 3882376 (1975-05-01), Schuster
patent: 4087740 (1978-05-01), Suau
patent: 4087741 (1978-05-01), Mufti
patent: 4122387 (1978-10-01), Ajam et al.
patent: 4340934 (1982-07-01), Segesman
patent: 4361808 (1982-11-01), Kern et al.
patent: 4412180 (1983-10-01), Desbrandes
patent: 4472307 (1984-09-01), Bravenec
patent: 4535625 (1985-08-01), Lyle, Jr.
Runge et al, "Ultra-Long Spaced Electric Log (ULSEL)", The Log Analyst, Sep.-Oct., 1969, pp. 20-30.
Angehrn Jorg A.
Chapman Carroll W.
Chevron Research Company
Edmonds Warren S.
Eisenzopf Reinhard J.
Keeling E. J.
LaPaglia S. R.
LandOfFree
Method of interpreting impedance distribution of an earth format does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of interpreting impedance distribution of an earth format, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of interpreting impedance distribution of an earth format will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1274273