Acoustics – Geophysical or subsurface exploration – Well logging
Patent
1996-12-11
1998-07-07
Eldred, J. Woodrow
Acoustics
Geophysical or subsurface exploration
Well logging
7315232, 73 1903, 7386125, 7386128, 175 48, 166264, G01V 140
Patent
active
057772789
ABSTRACT:
A method and apparatus is disclosed to identify fluid hydrocarbon flow rates in a flow line such as a pipeline or a producing oil well having a unidirectional fluid flow including moving an acoustic tool through a flow line. Acoustic energy is transmitted into the fluid flow. The acoustic energy is then received when it is reflected back by interfaces within the fluid flow. The reflected acoustic energy is transformed into electrical signals. The electrical signals are rectified. The amplitude peaks of the rectified electrical signals are determined. The travel times of the amplitude peaks are also determined. The amplitude peaks and the time values are used to determine hydrocarbon gas and the hydrocarbon liquid in the hydrocarbon fluid flow in the oil well. A transducer within the acoustic tool rotates three hundred sixty degrees six times per second. This enables us to obtain holdup and velocities for the total flow around the tool even in non ideal operating conditions such as deviated wells.
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Bednarczyk Adam
Maute Robert E.
Thompson Laird B.
Eldred J. Woodrow
Keen Malcolm D.
Mobil Oil Corporation
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