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LaTeX Math Block
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p_D =\frac{\sigma}{q_t}  \,cdot \Delta p}{q_t}

where

LaTeX Math Inline
body\Delta p

pressure drop

LaTeX Math Inline
bodyq_t

total sandface flowrate

LaTeX Math Inline
body\sigma

reservoir transmissibility


In Oil Field unit system:

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p_D =\frac{\sigma  \cdot \Delta p}{141.2 \, q_t} \, \Delta p

where

LaTeX Math Inline
body\Delta p

LaTeX Math Inline
bodyq_t

LaTeX Math Inline
body\sigma

psibpd(md·ft)/cp



See Also

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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Well Testing / Pressure Testing / Pressure Diffusion

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