U.S. Department of EnergyOffice of Scientific and Technical Information
Discrete-frequency multipole sonic logging methods and apparatus
Abstract
This patent describes a method of borehole logging, comprising the steps of: emitting sonic energy from a multipole source at a first location in a borehole, the sonic energy being of at least one discrete frequency which induces propagation of multipole sonic waves in the wall of the borehole; receiving sonic energy of the multipole sonic waves at multiple receiver locations in the borehole to produce a received sonic signal for each location, the multiple receiver locations being spaced apart from one another and from the first location; for each the receiver location, detecting the complex values of the received sonic signal; and processing the detected complex values of the received sonic signals to determine phase velocity of the multipole sonic waves in the borehole as a function of frequency.
- Inventors:
- Publication Date:
- OSTI Identifier:
- 5644168
- Patent Number(s):
- US 5077697; A
- Application Number:
- PPN: US 7-513319
- Assignee:
- Schlumberger Technology Corp., New York, NY (United States)
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 20 Apr 1990
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; BOREHOLES; SONIC LOGGING; MULTIPOLES; PHASE VELOCITY; SIGNALS; SOUND WAVES; WALLS; CAVITIES; VELOCITY; WELL LOGGING; 440400* - Well Logging Instrumentation
Citation Formats
Chang, S K. Discrete-frequency multipole sonic logging methods and apparatus. United States: N. p., 1991.
Web.
Chang, S K. Discrete-frequency multipole sonic logging methods and apparatus. United States.
Chang, S K. 1991.
"Discrete-frequency multipole sonic logging methods and apparatus". United States.
@article{osti_5644168,
title = {Discrete-frequency multipole sonic logging methods and apparatus},
author = {Chang, S K},
abstractNote = {This patent describes a method of borehole logging, comprising the steps of: emitting sonic energy from a multipole source at a first location in a borehole, the sonic energy being of at least one discrete frequency which induces propagation of multipole sonic waves in the wall of the borehole; receiving sonic energy of the multipole sonic waves at multiple receiver locations in the borehole to produce a received sonic signal for each location, the multiple receiver locations being spaced apart from one another and from the first location; for each the receiver location, detecting the complex values of the received sonic signal; and processing the detected complex values of the received sonic signals to determine phase velocity of the multipole sonic waves in the borehole as a function of frequency.},
doi = {},
url = {https://www.osti.gov/biblio/5644168},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 31 00:00:00 EST 1991},
month = {Tue Dec 31 00:00:00 EST 1991}
}