Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1978-07-27
1980-07-01
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
364422, 181103, G01V 140, G01V 128
Patent
active
042109671
ABSTRACT:
A predetermined signal is removed from waveforms generated in an acoustic investigation of a borehole to enable the accurate detection of relatively weak formation signals. A plurality of waveforms are produced from different sonic receivers used in an acoustic investigation of an earth formation from inside casing set in a borehole. The waveforms include a casing signal which is representative of the acoustic casing wave which traveled from a transmitter through the casing to the receivers. The casing signal is removed by aligning the waveforms in accordance with the known travel times for the casing wave from the transmitter to the receivers and summing the waveforms to produce a casing signal emphasized waveform. A portion of the latter is then subtracted from the waveforms from which the casing signal is thus effectively filtered to facilitate detection and analysis of formation signals present in the waveforms.
REFERENCES:
patent: 3292729 (1966-12-01), Blizard
Scott et al, "Acoustic Logging For Mining Applications", 6/5/74, pp. 1-10, SPWLA Fifteenth Annual Logging Symposium.
Garrana Henry N.
Moskowitz Nelson
Olsen Kenneth
Reens Louis H.
Schlumberger Technology Corp.
LandOfFree
Method and apparatus for determining acoustic wave parameters in does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for determining acoustic wave parameters in, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for determining acoustic wave parameters in will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-302003