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A production logging tool is provided for use within a well to directly measure a velocity profile of a multiphase fluid flow within a cross-section of a well. The production logging tool includes a tool housing from which a plurality of arms are radially extensible. The plurality of arms are rotata

A production logging tool is provided for use within a well to directly measure a velocity profile of a multiphase fluid flow within a cross-section of a well. The production logging tool includes a tool housing from which a plurality of arms are radially extensible. The plurality of arms are rotatably mounted to the tool housing for rotating around a tool axis extending longitudinally through the tool housing. At least one Doppler flow sensor is fixedly mounted to one of the plurality of arms for moving with the arm to dispose the Doppler flow sensor within different localized regions within a cross-section of the well. The localized regions of the cross-section are located at different radial distances from and at different angular displacements around the tool axis of the tool housing, at points distal from the tool axis. The Doppler flow sensor has a depth of investigation for detecting flow velocities of a multiphase fluid flow proximate to the Doppler flow sensor, within the localized regions of the cross-section of the well. The plurality of arms are rotated about the tool housing to dispose the Doppler flow sensor within different ones of the localized regions disposed throughout the cross-section for measuring a velocity profile of the multiphase fluid flow through the cross-section of the well. Flow velocities are also preferably detected within localized regions disposed within the boundary layer of the multiphase fluid flow.

대표청구항 ▼

A production logging tool for use to determine flow velocities of a multiphase fluid flow through a cross-section of a well, said production logging tool comprising: a tool housing having a tool axis which extends longitudinally through said tool housing; an arm extensibly and rotatably mounted to s

A production logging tool for use to determine flow velocities of a multiphase fluid flow through a cross-section of a well, said production logging tool comprising: a tool housing having a tool axis which extends longitudinally through said tool housing; an arm extensibly and rotatably mounted to said tool housing; a flow sensor mounted to said arm and having a depth of investigation for measuring flow velocities of said multiphase fluid flow within localized regions of a cross section of said well which are proximate to said flow sensor; means for rotating said arm to pass said flow sensor through a satellite path about said tool axis at different radial distances from and different angular displacements about said tool axis for moving said flow sensor between separate ones of said localized regions of said cross-section; actuator means for selectively controlling said radial distance between said flow sensor and said tool housing; means for monitoring said radial distances from and said angular displacements about said tool axis of said flow sensor; and wherein said flow sensor measures said flow velocities within said separate ones of said localized regions of said cross-section for determining said flow velocities of a velocity profile of said multiphase fluid flow through said cross section of said well.