High water cut well measurements using heuristic salinity determination
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United States of America Patent
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Sep 8, 2009
Grant Date -
Jan 17, 2008
app pub date -
Jun 13, 2007
filing date -
Jun 15, 2006
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Abstract
Methods and systems for determining the amount of water in a high water cut crude petroleum flow stream exiting from a hydrocarbon well. Electrical property measurements such as permittivity measurements are collected with a microwave analyzer system as high water cut oil exits from a well. Collection is continued until the span of the measurements of at least one property reaches at least a characteristic pre-determined value. A heuristic salinity of the water phase of the crude oil can then be determined based on the span statistics and reference equations and/or reference data. The flow-weighted average water content of the oil can then be determined using the heuristic salinity to correct for salinity variation as the output of the well changes over time.
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