| 摘要 |
A method of estimating chordal holdup values of gas, oil, and water (&egr;G, &egr;O, &egr;W) for tomographic imaging of a three-phase flow through a volume, including: providing an X-ray source for irradiating through said volume and X-ray sensors for discriminating between a first and a second radiation bands, conducting first calibration measurements (IGS, IOS, IWS) of said first radiation band, conducting second calibration measurements (IGH, IOH, IWH) of said second radiation band, arranging a mixture of two or more fluids, irradiating said volume and conducting X-ray measurements (IS, IH) in said radiation bands, establishing a relationship between a function of holdup values f(&egr;G, &egr;W) of at least gas and water and said X-ray measurements (IS, IH), searching holdup values (&egr;G, &egr;W) that minimize said function of holdup values f(&egr;G, &egr;W) under the constraints of the sum of said holdup values is more than or equal to zero and less than or equal to one, i.e. that 0≦̸&egr;G+&egr;W≦̸1. |
