Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1990-03-26
1990-10-09
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
367 28, 367 35, 181105, 73579, G01V 140, G01N 2900
Patent
active
049624890
ABSTRACT:
An acoustic borehole logging system employs an acoustic tranmitter excited by a sweep frequency tone burst to produce an acoustic output having a free-field frequency spectrum of at least one resonant frequency of vibration. A closely-spaced acoustic receiver detects a borehole frequency spectrum that is representative of the acoustic transmitter free-field frequency spectrum altered by the effects of the properties of the subsurface formulation materials comprising the borehole wall. Such detected borehole frequency spectrum is recorded in correlation with depth as a log of the material properties of the subsurface formations surrounding the borehole.
REFERENCES:
patent: 3817430 (1989-04-01), Benes et al.
patent: 4128011 (1978-12-01), Savage
patent: 4255798 (1981-03-01), Havira
patent: 4458340 (1984-07-01), Lautzenhiser
patent: 4688185 (1987-08-01), Magenheim et al.
patent: 4715019 (1987-12-01), Medlin et al.
patent: 4718046 (1988-01-01), Medlin
patent: 4733380 (1988-03-01), Havira
patent: 4742495 (1988-05-01), Medlin et al.
Manzi Stephen J.
Medlin William L.
Hager Jr. George W.
McKillop Alexander J.
Mobil Oil Corporation
Moskowitz Nelson
Speciale Charles J.
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