Patent ID: 7523647
Filing Date: 2009-04-28
Classification: G01N

Abstract:
1. A method for determining a first phase fraction of a multiphase fluid, comprising the actions of: collecting a plurality of measurements, using at least one measurement sensor and no reference sensor, on at least one gravitationally-separated portion of the fluid corresponding to at least a second phase of the fluid, and identifying at least one said measurement as corresponding to the second phase of the fluid based on a measurement minima; exploiting said identified measurement corresponding to the second phase of the multiphase fluid to correct the values of other ones of said plurality of measurements corresponding to at least the first phase and the second phase of the multiphase fluid; and calculating and outputting the fraction of said first phase of the multiphase fluid using at least some of said corrected values of said plurality of measurements by applying a derived corrective transform to the plurality of measurements covering all of the gravitationally- separated portions to thereby correct said measurements using hindsight determination.