Selectively combining segments of at least four acoustic well lo

Details Selectively combining segments of at least four acoustic well lo Selectively combining segments of at least four acoustic well lo

1978-07-27

1980-07-01

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Well logging

367 31, 181103, G01V 140, G01V 136

Patent

active

042109663

ABSTRACT:
At least four waveforms representative of sonic waves obtained from an acoustic investigation of a borehole with at least four sonic receivers are combined to automatically measure a parameter of a wave present in the waveforms. The waveforms are derived from sonic receivers which are selectively spaced from each other as well as the sonic transmitter whose sonic pulses caused the sonic waves. Several techniques are described to measure acoustic wave parameters such as the interval travel time of compressional and shear waves for open or cased boreholes. In accordance with one technique a multiple fold correlation process and apparatus are described to measure the acoustic wave parameter.

REFERENCES:
patent: 3281773 (1966-10-01), Newman
patent: 3292729 (1966-12-01), Blizard
patent: 3424268 (1969-01-01), Vogel
patent: 3696331 (1972-10-01), Guinzy et al.
Scott et al., "Acoustic Logging for Mining Applications," 6/5/74, pp. 1-10, SPWLA 15th Annual Logging Symposium.

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