Swept energy source acoustic logging system
Patent
·
OSTI ID:6528699
An acoustic energy mode propagation speed or travel time measurement system for use in well logging is disclosed. A downhole sonde is provided with an acoustic transmitter and at least one acoustic receiver. The transmitter is repetitively driven with a unique or characteristic swept frequency signal. Propagated acoustic energy detected at the receiver is cross-correlated with the characteristic transmitter swept frequency signal to provide indications of the arrival of various modes of acoustic energy propagation at the receiver. Logs as a function of borehole depth of the speed of propagation of the various modes of propagation may be derived.
- Assignee:
- Halliburton Company
- Patent Number(s):
- US 4450540
- OSTI ID:
- 6528699
- 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
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
BOREHOLES
CAVITIES
COMPUTER CALCULATIONS
DEPTH
DIMENSIONS
EQUIPMENT
FREQUENCY DEPENDENCE
PHASE VELOCITY
PROBES
SIGNALS
SONIC LOGGING
SONIC PROBES
TIME MEASUREMENT
VELOCITY
WAVE PROPAGATION
WELL LOGGING
WELL LOGGING EQUIPMENT
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
BOREHOLES
CAVITIES
COMPUTER CALCULATIONS
DEPTH
DIMENSIONS
EQUIPMENT
FREQUENCY DEPENDENCE
PHASE VELOCITY
PROBES
SIGNALS
SONIC LOGGING
SONIC PROBES
TIME MEASUREMENT
VELOCITY
WAVE PROPAGATION
WELL LOGGING
WELL LOGGING EQUIPMENT