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LaTeX Math Inline
bodyp_i = p(0)

initial formation pressure

LaTeX Math Inline
bodyQ^{\uparrow}_t(t)

cumulative offtakes from

LaTeX Math Inline
bodyk
-th producer by the time moment
LaTeX Math Inline
bodyt

LaTeX Math Inline
bodyA_e

drainage area

LaTeX Math Inline
bodyQ^{\downarrow}_t(t)

cumulative intakes to

LaTeX Math Inline
bodyi
-th injector by the time moment
LaTeX Math Inline
bodyt

LaTeX Math Inline
bodyh_e

effective formation thickness averaged over drainage area

LaTeX Math Inline
bodyQ^{\uparrow}_t(t)

full-field cumulative offtakes by the time moment

LaTeX Math Inline
bodyt

LaTeX Math Inline
body\phi_e(p)

 effective porosity as function of formation pressure 

LaTeX Math Inline
bodyp(t)
 

LaTeX Math Inline
bodyQ^{\downarrow}_t(t)

full-field cumulative intakes by the time moment

LaTeX Math Inline
bodyt

LaTeX Math Inline
bodyc_t(p)


total compressibility as function of formation pressure 

LaTeX Math Inline
bodyp(t)

LaTeX Math Inline
bodyQ^{\downarrow}_{GC}(t)

cumulative volumetric inflow from Gas Cap Expansion

LaTeX Math Inline
body\Delta Q (t)

full-field cumulative reservoir fluid balance

LaTeX Math Inline
bodyQ^{\downarrow}_{WAQ}(t)

cumulative volumetric inflow from Aquifer Expansion


The MatBal equation  which equation 

LaTeX Math Block Reference
anchorMatBal
 which is often completed by constant PI  model of Bottom-Hole Pressure (
LaTeX Math Inline
bodyp^{\uparrow}_{wf}(t)
 for producers and 
LaTeX Math Inline
bodyp^{\downarrow}_{wf}(t)
 for injectors):

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