Method for interpreting data measured in a hydrocarbon well in production

A method for calculating the relative volumetric flow-rates of at least one of the phases of a multiphase effluent flowing in a well, said method comprising a first step of acquiring local volumetric fractions and/or velocities of said phases across a section of the well at a certain depth, and said method further comprising:

• correcting said local volumetric fraction and/or velocity measurements in order to make them consistent with each other and/or with the effluent flow conditions;
• selecting a suitable flow model mathematically representing the effluent flow;
• interpolating said local volumetric fractions measurements and/or said local velocity measurements by the selected flow model in order to obtain a volumetric fraction profile and/or a velocity profile for at least one phase of the effluent across said section of the well at said depth;
• calculating the relative volumetric flow rates of said at least one phase by integration of said volumetric fraction and/or velocity profiles over said section of the well at said depth.

The method according to claim 1, wherein the steps are achieved as follows:

• correcting the systematic measurement errors due to measurement means;
• selecting a suitable flow model;
• checking coherence of the local volumetric fraction measurement between themselves and/or coherence of the local velocity measurements between themselves;
• checking for mutual coherence between the local volumetric fraction measurements and the local velocity measurements;
• refining the local volumetric fraction measurements and the local velocity measurements thanks to the result of the analysis respectively of the local velocity measurements and the local volumetric fraction measurements;
• re-doing the previous steps until the local volumetric fraction and/or velocity measurements fit the flow model that has been selected;
• interpolating said local volumetric fraction measurements and/or said local velocity measurements by the selected flow model in order to obtain a volumetric fraction profile and/or a velocity profile for at least one phase of the effluent across said section of the well at said depth;
• calculating the relative volumetric flow rates of said at least one phase by integration of said volumetric fraction and/or velocity profiles over said section of the well at said depth.