Acoustic logging using ultrasonic frequencies

Details Acoustic logging using ultrasonic frequencies Acoustic logging using ultrasonic frequencies

1975-02-27

1976-06-08

Moskowitz, Nelson

Communications: electrical

Selective

Having electron beam device

340 155BH, 181103, 340 155TN, G01V 140

Patent

active

039626741

ABSTRACT:
A pulse of ultrasonic acoustic energy applied to an earth formation by means of a well logging tool initiates a first compressional formation pulse followed by a secondary pulse of lower amplitude and velocity traveling exclusively in the formation fluid. These two pulses are located, identified and quantized with cross-correlation techniques to give a direct indication of formation permeability, to identify accurately the nature of the formation fluid, and to provide a more accurate determination of formation porosity.

REFERENCES:
patent: 3102251 (1963-08-01), Blizard
patent: 3130808 (1964-04-01), Walker et al.
patent: 3175639 (1965-03-01), Liben
patent: 3356177 (1967-12-01), Loren
patent: 3622969 (1971-11-01), Lebreton et al.
Chombart, "Well Logs in Carbonate Reservoirs", 8/60, pp. 779, 786, 792-810, 830-835, Geophysics, vol. 25, No. 4.

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