GLOSSARY

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DeploymentBorehole
Log NameILS
Math Symbol

LaTeX Math Inline
bodyf_{ILS}

Measured PropertyFluid flow velocity along the tool
Sensor TypeMechanical Spinner
Units
SIHz 
Oil MetricRPM  = 60 Hz
Oil Field

RPM  = 60 Hz



Applications


  • Assesing donwhole flowrate


Sample Logs



Tool Schematic




Mathematical Model



LaTeX Math Block
alignmentleft
f_{ILS} = S_{\rm slope} \cdot ( v - v_{th})

where 

LaTeX Math Inline
bodyS_{\rm slope}
 is some constant depending on tool construction and well completion , 
LaTeX Math Inline
bodyv_{th}
 a critical value of the flow speed which can initiate spinner rotation, 
LaTeX Math Inline
bodyv
 – flow velocity.