GLOSSARY

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DeploymentBorehole
Log NameRHOF
Math Symbol

LaTeX Math Inline
body\rho_f

Measured PropertyFluid electrical capacitance density
Sensor TypeInduced Gamma-ray Detector
Units
SIkg/m3
Oil Metricg/cc = 103 kg/m3
Oil Field

g/cc = 103 kg/m3




Applications


  • Assessing borehole fluid densityAssessing borehole multiphase flow components


Sample Logs



Tool Schematic





Mathematical Model



LaTeX Math Block
alignmentleft
\rho_f = \rho_w s_w + \rho_o s_o + \rho_g s_g

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\{ \rho_w , \ \rho_o , \ \rho_g \}
 – are reference values for capacitance of water, oil and gas at given temperature and pressure.

The typical values are:

LaTeX Math Inline
body\rho_{\rm gas}

0.001 g/cc

LaTeX Math Inline
body\rho_{\rm oil}

0.7 – 0.9 g/cc

LaTeX Math Inline
body\rho_{\rm water}

1.00 – 1.17 g/cc