Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1980-12-01
1982-09-14
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
367 28, 367 29, 367 40, 367 98, 181103, 364825, 179 1555T, G01V 140
Patent
active
043498965
ABSTRACT:
A well-logging method and apparatus in which a fast real time portion of a logging signal is sequentially sampled at discrete times. These sampled segments are stored and then are clocked out of storage over an expanded time period.
The rms amplitude portion of the logging signal occurring prior to the compression wave part of the logging signal (the nominal noise level) may be used for AGC regulation of an amplifier which amplifies the time-expanded output.
A similar development of an rms value can be used for establishing a threshold level for a peak detector, which level is set slightly higher than such rms value. The first three successive samples greater than the threshold level detected by the detector are presumed to be the first three samples of the compression wave. This presumed compression wave is recorded and convolved against the expanded-time digital form of the logging signal to locate the compression wave in a second received signal and, later, the similarly appearing "shear" wave.
REFERENCES:
patent: 3289157 (1966-11-01), Brokow
patent: 3305785 (1967-02-01), Carrol
patent: 3435224 (1969-03-01), Temenek
patent: 3599175 (1971-08-01), Hollingsworth et al.
patent: 3944965 (1976-03-01), Caforin et al.
patent: 4012712 (1977-03-01), Nelligan
patent: 4027281 (1977-05-01), Greve et al.
patent: 4042907 (1977-08-01), Trouiller
patent: 4210966 (1980-07-01), Lugran
patent: 4216536 (1980-08-01), Mou
patent: 4307380 (1981-12-01), Garder
Beard William J.
Halliburton Company
Moskowitz Nelson
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