Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Patent
1997-04-01
1999-03-16
McElheny, Jr., Donald E.
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Earth science
G06F 1900
Patent
active
058842276
ABSTRACT:
A method of adjusting induction receiver signals for skin effect in an induction logging instrument including a plurality of spaced apart receivers and a transmitter generating alternating magnetic fields at a plurality of frequencies. The method includes the steps of extrapolating magnitudes of the receiver signals at the plurality of frequencies, detected in response to alternating magnetic fields induced in media surrounding the instrument, to a response which would obtain at zero frequency. A model of conductivity distribution of the media surrounding the instrument is generated by inversion processing the extrapolated magnitudes. Magnitudes of the receiver responses at the plurality of frequencies are synthesized based on the model of conductivity distribution. A difference between the synthesized magnitudes and the measured magnitudes is determined; the difference is used to correct the measured magnitudes and the steps of extrapolating, generating the model based on the extrapolated magnitudes and determining the difference are repeated until the difference represents less than a predetermined fraction of the measured magnitudes.
REFERENCES:
patent: 5666057 (1997-09-01), Beard et al.
patent: 5698982 (1997-12-01), Mitchell et al.
patent: 5703773 (1997-12-01), Tabarovsky et al.
T. Tamarchenko and L. Tabarovsky, Fast Frequency Domain Electromagnetic Modeling in Axially Symmetric Layered Media, Radio Science, vol. 29, No. 4,pp. 979-992, Jul.-Aug. 1994.
Rabinovich Michael B.
Tabarovsky Leonty A.
Fagin Richard A.
McElheny Jr. Donald E.
Western Atlas International Inc.
LandOfFree
Method for interpreting induction logs in high resistivity contr 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 for interpreting induction logs in high resistivity contr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for interpreting induction logs in high resistivity contr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-826975