Continuous wave sonic logging

Details Continuous wave sonic logging Continuous wave sonic logging

1983-05-05

1983-12-06

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Well logging

367 28, 367 32, 367912, 181102, G01V 140, G01V 128

Patent

active

044197489

ABSTRACT:
Apparatus and method for sonic borehole logging using a continuous wave transmitted signal. The transmitted signal is received at a plurality of points distributed along the borehole axis and sampled synchronously with the transmitted signal. The resulting sampled signal is analyzed, for example, by Fourier analysis, to identify each spatial frequency component. Each frequency component identified indicates the velocity of a particular acoustic wave path from the transmitter to the receiver.

REFERENCES:
patent: 2868311 (1959-01-01), Tullos
patent: 2878886 (1959-03-01), Overton
patent: 3073406 (1963-01-01), Westphal
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patent: 3719924 (1973-03-01), Muir et al.
patent: 4184562 (1980-01-01), Bakamjian
patent: 4319345 (1982-03-01), Dennis
patent: 4328567 (1982-05-01), Dodge
patent: 4339810 (1982-07-01), Nichols et al.
Pickett, "Acoustic Character Logs . . . Evaluation", 6/63, pp. 659-667, Journ. Petr. Tech.
Aron et al., "Formation Compressional . . . Techniques", 10/78, pp. 1-11, 53rd SPE of AIME.

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