초록 ▼

Method and apparatus are disclosed for determining the water cut of an oil-water flow in a wellbore having a known deviation angle less than 90. A first step includes generating a set of predicted response curves where each response curve relates discrete selected values of the water cut to test val

Method and apparatus are disclosed for determining the water cut of an oil-water flow in a wellbore having a known deviation angle less than 90. A first step includes generating a set of predicted response curves where each response curve relates discrete selected values of the water cut to test values representative of a value of the flow mixture functionally related to measured responses of a selected logging instrument capable of distinguishing between the water and oil phases of the flow mixture for a selected oil-water total flow rate and at a borehole deviation within a selected range of deviation values that include the known borehole deviation. Then the selected logging instrument combination is introduced into the borehole for measuring the total flow rate of the oil-water mixture and the values representative of the responses of the selected logging instrument distinguishing between the oil and water phases of the oil-water mixture. A value functionally related to the measured value representative of the responses of the selected logging instrument is generated. From the set of predicted response curves an estimated value of the water cut of the oil-water mixture at the measured borehole total flow rate of the oil-water mixture is determined in response to the generated value functionally related to the measured value representative of the responses of the selected logging tool.

대표청구항 ▼

A method of determining the flow rate of a selected single phase of a flow mixture having at least two phases expressed as fraction of the total flow rate of the flow mixture in a wellbore having a known deviation angle less than 90°, comprising the steps of: generating a set of predicted response c

A method of determining the flow rate of a selected single phase of a flow mixture having at least two phases expressed as fraction of the total flow rate of the flow mixture in a wellbore having a known deviation angle less than 90°, comprising the steps of: generating a set of predicted response curves wherein each such response curve relates discrete selected values of the flow rate of the selected single phase of the flow mixture having at least two phases expressed as a fraction of the total flow rate of the flow mixture to test values representative of the volumetric concentration of the selected single phase of the flow mixture functionally related to measured responses of a selected logging instrument capable of distinguishing between the at least two phases of the flow mixture for a selected fluid mixture total flow rate and at a borehole deviation within a selected deviation range that includes the known borehole deviation; measuring in the borehole the total flow rate of the fluid mixture including the selected single phase thereof; measuring in the borehole values representative of said responses of said selected logging instrument distinguishing between the at least two phases of the flow mixture; generating a value representative of the volumetric concentration of the selected single phase of the flow mixture functionally related to said measured value representative of said responses of said selected logging instrument; and determining from said set of predicted response curves an estimated value of the flow rate of the selected single phase of the flow mixture expressed as a fraction of the total flow rate of the flow mixture at said measured borehole total flow rate of the fluid mixture in response to said generated value representative of said volumetric concentration of the selected single phase of the flow mixture.