Method for extracting acoustic velocities in a well borehole
This patent describes in a sonde carrying an acoustic transmitter means for transmitting an acoustic pulse along a well borehole to an acoustic receiver wherein the transmitter and receiver are supported by the sonde in a well borehole, a method of improving the accuracy of an acoustic log. The method comprising the steps of: for a depth zone of interest, determining a first interval transit time measurement; for the same depth zone, determining a second and independent interval transit time; as a function of the first and second interval transit times, forming a difference signal; and evaluating the difference signal relative to a specified determinant the determinant being a function of the time period of a primary frequency acoustic pulse for an indication of acoustic pulse cycle skipping in recognition of onset of received acoustic pulses at the acoustic receiver while correcting for any detected cycle skips.
- Assignee:
- Halliburton Logging Services, Inc., Houston, TX
- Patent Number(s):
- US 4845616
- Application Number:
- PPN: US 7-083140A
- OSTI ID:
- 5285147
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
EQUIPMENT
EXPLORATORY WELLS
GEOLOGIC DEPOSITS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
PROBES
RESOURCES
SONIC LOGGING
SONIC PROBES
SOUND WAVES
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS