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Excerpt


LaTeX Math Block
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s_w(h)=P_{cow}^{-1}[(\rho_w -\rho_o) g (h-h_{FWL})]

based on implicit solution of the constant pressure gradient equation:

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(\rho_w -\rho_o) \cdot g \cdot (h-h_{FWL}) = P_{cow}(s_w)

where

LaTeX Math Inline
body\rho_o=\rho_o(T_i, \, p_i)
 и 
LaTeX Math Inline
body\rho_w=\rho_w(T_i, \, p_i)
 – oil and water densities at initial formation temperature
LaTeX Math Inline
bodyT_i
and pressure
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bodyp_i
.


This model requires reliable and representative data bank on capillary pressure at sandface conditions.



See also

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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics / Capillary pressure @model 


References

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SPE 71326, B. Harrison (Enterprise Oil), X.D. Jing (Imperial College, London), Saturation Height Methods and Their Impact on Volumetric Hydrocarbon in Place

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