Method and apparatus for determining acoustic wave parameters in well logging
Patent
·
OSTI ID:5027294
An automatic sonic borehole investigating method operating with sonic waveforms derived from a plurality of sonic receivers which are vertically disposed in a predetermined manner in a borehole to respond to sonic waves introduced to propagate through an acoustic responsive medium by a transmitter located at preselected distances from the receivers comprising the steps of producing waveforms individually representative of sonic waves incident upon respective different receivers; estimating the arrival time of a predetermined signal in the different waveforms; combining the different waveforms in correspondence with an alignment of the estimated signal arrivals to form a signal emphasized waveform; and removing predetermined portions of the signal emphasized waveform from respectively associated waveforms to produce waveforms from which the predetermined signal is effectively filtered.
- Assignee:
- Schlumberger Technology Corp
- Patent Number(s):
- US 4210967
- OSTI ID:
- 5027294
- Country of Publication:
- United States
- Language:
- English
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