Acoustical well logging method and apparatus

Details Acoustical well logging method and apparatus Acoustical well logging method and apparatus

1989-01-23

1990-02-13

Tarcza, Thomas H.

Acoustics

Geophysical or subsurface exploration

Well logging

367 25, 367911, G01V 140

Patent

active

048998443

ABSTRACT:
A method and tool for acoustically logging a wellbore where a transmitter simultaneously generates a plurality of separate acoustical signals having different frequencies, each effectively centered about a different resonance frequency, and then transmits the signals as a composite multi-frequency output signal having an effective broad frequency bandwidth that is capable of exciting pressure waves in a variety of different types of earthen formations.

REFERENCES:
patent: 3363118 (1968-01-01), Sims
patent: 3593255 (1971-07-01), White
patent: 3786894 (1974-01-01), Lebreton
patent: 4004267 (1977-01-01), Mayne
patent: 4415998 (1983-11-01), Blizard
patent: 4649525 (1987-03-01), Angona et al.
patent: 4649526 (1987-03-01), Winbow et al.
patent: 4682308 (1987-07-01), Chung
patent: 4700100 (1987-10-01), Congdon
patent: 4700803 (1982-10-01), Mallett et al.
patent: 4715019 (1987-12-01), Medlin et al.
patent: 4718046 (1988-01-01), Medlin
"A Theoretical Study of Acoustic S-Wave and P-Wave Velocity Logging," Winbow G. A., Geophysics, vol. 53, #10, Oct. '88.
"Continuous Acoustic Shear Wave Logging," Zemanek et al., Paper V, SPWLA 25th Symposium, Jun. 1984.
"New Ways to Make Shear Waves," The Technical Review, vol. 53, #3, pp. 12-13.

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