INCL (Inclinometer Logging Tool)

Scope of Applicability

• Assess tool orientation in 3D space 
  
  
• Depth Matching between cased-hole logs and well schematic based on location of tubing/casing collars
  
  
• Correct pressure gradient for well deviation to assess fluid density and fluid friction model 
  
  

Mathematical Model

where 

$//<![CDATA[ \begin{array}{l}l = \int \sqrt{dx^2 + dy^2 +dz^2}\end{array} //]]>$ – along-hole measured depth 

$//<![CDATA[ \begin{array}{l}\theta\end{array} //]]>$ – is deviation from true vertical depth

$//<![CDATA[ \begin{array}{l}\phi\end{array} //]]>$ – azimuth in tangent plane.