Method for extracting acoustic velocities in a well borehole

Patent · Tue Jul 04 00:00:00 EDT 1989

OSTI ID:5285147

Phillips, W E

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
• Resource Relation: Patent File Date: 10 Aug 1987
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
EXPLORATORY WELLS
SONIC LOGGING
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
SONIC PROBES
SOUND WAVES
WELL LOGGING EQUIPMENT
EQUIPMENT
GEOLOGIC DEPOSITS
MINERAL RESOURCES
PROBES
RESOURCES
WELL LOGGING
WELLS
020200* - Petroleum- Reserves
Geology
& Exploration
030200 - Natural Gas- Reserves
Geology
& Exploration