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DeploymentBorehole
Log NameRHOF
Math Symbol

LaTeX Math Inline
body\rho_f

Measured PropertyFluid electrical capacitance
Sensor TypeCapacitorInduced Gamma-ray Detector
Units
SIdimensionlesskg/m3
Oil Metricdimensionlessg/cc = 103 kg/m3
Oil Field

dimensionless

Image Removed

g/cc = 103 kg/m3




Applications


Applications

  • Assesing donwhole flowrate


Sample Logs



Tool Schematic

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Mathematical Model



LaTeX Math Block
alignmentleft
Y\rho_f = F_{\rm cap} \left( \frac{Y\rho_w s_w + Y\rho_o s_o + Y\rho_g s_g}{\mathring{Y}_w} \right)

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\{ Y\rho_w , \ \ Yrho_o , \ \ Yrho_g \}
 – are reference values for capacitance of water, oil and gas at given temperature and pressure,

LaTeX Math Inline
body\mathring{Y}_w
 fresh water capacitance at NTP,

LaTeX Math Inline
bodyF_{\rm cap}
 – non-near function specific to each tool.

The typical values are:

LaTeX Math Inline
bodyY\rho_{\rm gas}

70.001 g/cc

LaTeX Math Inline
bodyY\rho_{\rm oil}

15 – 300.7 – 0.9 g/cc

LaTeX Math Inline
bodyY\rho_{\rm water}

100
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1.00 – 1.17 g/cc