Continuous wave sonic logging

Patent · Tue Dec 06 00:00:00 EST 1983

OSTI ID:6932149

Siegfried, II, R W

Apparatus and method are disclosed for sonic borehole logging, using a continuous wave transmitted signal. The transmitted signal is received at a plurality of points distributed along the borehole axis and sampled synchronously with the transmitted signal. The resulting sampled signal is analyzed, for example, by Fourier analysis, to identify each spatial frequency component. Each frequency component identified indicates the velocity of a particular acoustic wave path from the transmitter to the receiver.

• Assignee: Atlantic Richfield Co.
• Patent Number(s): US 4419748
• OSTI ID: 6932149
• Resource Relation: Patent File Date: Filed date 5 May 1983; Other Information: PAT-APPL-490208
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
04 OIL SHALES AND TAR SANDS
15 GEOTHERMAL ENERGY
47 OTHER INSTRUMENTATION
BOREHOLES
SONIC LOGGING
ACOUSTIC MONITORING
FOURIER ANALYSIS
FREQUENCY ANALYSIS
MEASURING INSTRUMENTS
SIGNALS
VELOCITY
CAVITIES
MONITORING
WELL LOGGING
020200* - Petroleum- Reserves
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& Exploration
030200 - Natural Gas- Reserves
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040100 - Oil Shales & Tar Sands- Reserves & Exploration- (-1989)
150303 - Geothermal Exploration & Exploration Technology- Exploratory Drilling & Well Logging
440400 - Well Logging Instrumentation