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DeploymentBorehole
Log NameDIFP
Math Symbol

LaTeX Math Inline
body\Delta p

Measured PropertyFluid pressure gradient
Sensor TypeQuartz resonator
Units
SIPa/m
Oil MetrickPa/m
Oil Field

psi/m



Applications


  • Assessing borehole multiphase flow components

  • Assessing borehole flow velocity along the tool


Sample Logs



Tool Schematic





Mathematical Model

LaTeX Math Block
alignmentleft
\sigma_f = \sigma_w s_w + \sigma_o s_o + \sigma_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\{ \sigma_w , \ \sigma_o , \ \sigma_g \}
 – are reference values for conductivity of water, oil and gas at given temperature and pressure.


Image RemovedMathematical model for fluid pressure gradient is set in WFS – Wellbore Flow Simulation