Patent ID: 8126661

Claim:
A method comprising: passing a multi-phase process fluid through a vibratable flowtube, the multi-phase process fluid comprising more gas than liquid during a first period and more liquid than gas during a second period; inducing motion in the vibratable flowtube; determining a first apparent property and a second apparent property of the multi-phase process fluid based on the motion of the vibratable flowtube, the first apparent property being associated with the multi-phase process fluid during the first period, the second apparent property being associated with the multi-phase fluid during the second period, and the first and second apparent properties incorporating respective inaccuracies caused by the multi-phase process fluid passing through the flowmeter; determining a first apparent intermediate value based on the first apparent property and a second apparent intermediate value based on the second apparent property; determining a first modified intermediate value based on the first apparent intermediate value and a second modified intermediate value based on the second apparent intermediate value, the first and second modified intermediate values at least partially correcting for the inaccuracy caused by the multi-phase process fluid passing through the flowmeter; determining, based on the first modified intermediate value, a phase-specific property of a phase of the multi-phase process fluid passing through the flowtube during the first period; and determining, using one or more processing devices and based on the second modified intermediate value, a phase specific property of a phase of the multi-phase process fluid passing through the flowtube during the second period.