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Most Subsurface E&P Disciplines (except Petrophysics) usually omit index "e" and denote Effective porosity as
. LaTeX Math Inline body \phi = \phi_e
Effective porosity at the initial formation pressure
is usually denoted as LaTeX Math Inline body p_i
. LaTeX Math Inline body \phi_i
See also
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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics (PP) / Volumetric Rock Model
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