Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1986-10-15
1989-02-28
Tarcza, Thomas H.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
367 27, G01V 140
Patent
active
048092363
ABSTRACT:
Techniques are described whereby measurements derived from acoustic investigations made from inside a borehole penetraing an earth formation are factorized into components with high depth resolution. In one embodiment travel times of an acoustic wave such as the compressional is factored into mud travel time and interval travel times through the earth formation. In another embodiment amplitude measurements of an acoustic wave are factored into components such as receiver gain, earth formation attenuation, and coupling effectiveness at the boundary between the borehole and the earth formation. In both embodiments an additional component can be factored out that is a function of transmitter to receiver spacings. A modified Gauss-Seidel iteration technique is described whereby iterations can rapidly converge with less sensitivity to large variations in the measurements. Factorization of receiver gains effectively enables calibration of the receivers during well logging.
REFERENCES:
patent: 4346460 (1982-01-01), Schuster
patent: 4543648 (1985-09-01), Hsu
patent: 4554647 (1985-11-01), Rafipour
patent: 4554649 (1985-11-01), Herkenhoff
"Residual Statics Analysis as a General Linear Inverse Problem," Wiggins et al., Geophysics, vol. 41, #5, 10/76.
"Formalized Inversion of Full Waveform Acoustic Log Traveltimes for Velocity," Willis et al., SEG 1983.
"Inversion of Travel Time for Velocity," Willis, M. E., SEG, 1983.
"Inversion of Travel Time for Velocity Using Multispacing Sonic tools," Paternoster, B. J., M.I.T. Earth Sciences Lab.
"On Some Further Aspects of Far Filtering," Expanded Abstracts with Biographics, 55th Int. SEQ Meeting, 10/6-10/85.
"Band-Limiting Interpolation Operators and Applications in Seismic Processing," Expanded Abstracts with Biographies, SEG mtg, 1984.
"Analysis of Sonic Log Compressional Wave Amplitudes, Using Borehole Compensation Techniques," 1984, SPWLA 25th Annular Log. Symp.
"Full Waveform Sonic Logging Techniques," Siegfried et al., SPWLA 23th Annular Logging Symposium, 1982.
"Optimum Inverse Filters Which Shorten the Spacing of Velocity Logs," M. R. Foster et al., Geophysics, vol. 27(3).
Hsu Kai
Wiggins Ralphe
Lobo Ian J.
Reens Louis H.
Schlumberger Technology Corporation
Tager Clifford L.
Tarcza Thomas H.
LandOfFree
Method and apparatus for determining the magnitude of components 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 and apparatus for determining the magnitude of components, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for determining the magnitude of components will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1374101