Motivation

Inputs & Outputs

Inputs		Outputs
	field-average formation pressure at time moment		Cumulative subsurface water influx from aquifer
	initial formation pressure		Subsurface water flowrate from aquifer
	aquifer Productivity Index

Radial Composite Reservoir
Steady-state flow
Aquifer pressure is constant
Aquifer Productivity Index is constant

		Fig. 1. Schilthuis aquifer drive schematic

Q^{\downarrow}_{AQ}(t) = J_{AQ} \cdot \left[ p_i \cdot t  - \int_0^t p(t) dt \right]

q^{\downarrow}_{AQ}(t) = J_{AQ} \cdot (p_i - p(t))

It maybe considered as partial case of Fetkovich Aquifer Drive @model with infinite Aquifer volume.