GLOSSARY

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DeploymentBorehole
Log NameCAP
Measured PropertyFluid capacitance
Sensor TypeCapacitor
Units
SIdimensionless
Oil Metricdimensionless
Oil Field

dimensionless



Applications


  • Assesing donwhole flowrate


Sample Logs



Tool Schematic




Mathematical Model



LaTeX Math Block
alignmentleft
CAPY = \frac{CAPY_w s_w + CAPY_o s_o + CAPY_g s_g}{CAP_\mathring{w0Y}_w}

where 

LaTeX Math Inline
body\{ s_w, \ s_o, \ s_g \}
 – volumetric fractions of water, oil and gas phase (
LaTeX Math Inline
bodys_w + s_o + s_g = 1
), 

LaTeX Math Inline
body\{ CAPY_w , \ CAPY_o , \ CAPY_g \}
 – are reference values for capacitance of water, oil and gas at given temperature and pressure,

LaTeX Math Inline
bodyCAP_\mathring{w0Y}_w
 fresh water capacitance at NTP.

The typical values are

LaTeX Math Inline
bodyY_{\rm gas}

7

LaTeX Math Inline
bodyY_{\rm oil}

15 – 30

er

LaTeX Math Inline
bodyY_{\rm gas}