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Continuous wave sonic logging

Patent ·
OSTI ID:6932149
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
Country of Publication:
United States
Language:
English

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Related Subjects

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