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InputsOutputs

LaTeX Math Inline
bodyp(t)

field-average formation pressure at time moment

LaTeX Math Inline
bodyt

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

Cumulative subsurface water influx from aquifer

LaTeX Math Inline
bodyp_i

initial formation pressure

LaTeX Math Inline
bodyq^{\downarrow}_{AQ}(t) = \frac{dQ^{\downarrow}_{AQ}}{dt}

Subsurface water flowrate from aquifer

LaTeX Math Inline
bodyB

water influx constant

LaTeX Math Inline
body\chi

aquifer diffusivity

LaTeX Math Inline
body--uriencoded--A_e = \pi \, r_e%5e2

net pay area
Expand
titleDetailing
Detailing Inputs

LaTeX Math Inline
bodyB = \frac{\theta}{\pi} \cdot A_e \cdot h_a \cdot \phi_a \cdot c_t

water influx constant

LaTeX Math Inline
body\theta

central angle of net pay area ↔ aquifer contact

LaTeX Math Inline
bodyh_a

aquifereffective thickness

LaTeX Math Inline
body\phi_a

aquiferporosity

LaTeX Math Inline
bodyc_t=c_\phi +c_w

aquifer total compressibility

LaTeX Math Inline
bodyc_\phi

aquifer pore compressibility 

LaTeX Math Inline
bodyc_w

aquifer water compressibility


Physical Model

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Radial Composite Reservoir

Transient flow
Computational approximation to van Everdingen-Hurst (VEH)









Fig. 1. Carter-Tracy aquifer drive schematic

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