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Tip

In Well Testing applications the logarithmic derivative is often denoted as 

LaTeX Math Inline
bodyp' = t \, \frac{dp}{d t}
 which is misnomer as the usual mathematical convention for prime " ' " is the regular Derivative with respect to the argument
LaTeX Math Inline
bodyp' = \frac{dp}{d t}
.


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Formal science / Mathematics / Calculus

[ Logarithmic Derivative @model ]

Petroleum Industry / Upstream / Subsurface E&P Disciplines / Well Testing / Pressure Testing / Pressure Transient Analysis (PTA) /  PTA Diagnostic Plot

[ Well & Reservoir Surveillance ] [ Pressure Diffusion ] [ Pressure log-log plot ][ Logarithmic Derivative @model ]