DIFP (Differential Pressure Logging Tool)

Applications

• Assessing borehole multiphase flow components
  
  
• Assessing borehole flow velocity along the tool

Sample Logs

Tool Schematic

Mathematical Model

where

  $//<![CDATA[ \begin{array}{l}\{ s_w, \ s_o, \ s_g \}\end{array} //]]>$ – volumetric fractions of water, oil and gas phase ( $//<![CDATA[ \begin{array}{l}s_w + s_o + s_g = 1\end{array} //]]>$), 

$//<![CDATA[ \begin{array}{l}\{ \sigma_w , \ \sigma_o , \ \sigma_g \}\end{array} //]]>$ – are reference values for conductivity of water, oil and gas at given temperature and pressure.