Aquifer Models Functions - Petroleum Office

Calculates aquifer productivity index for radial flow (Fetkovich), [bbl/day/psi].

Calculates aquifer productivity index for linear flow (Fetkovich), [bbl/day/psi].

Calculates average aquifer pressure (Fetkovich), [psi]. pa = pi * (1 - We/Wei).

Calculates water influx rate (Fetkovich), [bbl/day]. qw = J * (pa - pr).

Calculates maximum encroachable water (Fetkovich), [bbl]. Wei = ct * Wi * pi.

Calculates initial water volume in aquifer (radial), [bbl].

Calculates aquifer pore volume for pot aquifer model, [bbl].

Calculates instantaneous water influx for pot aquifer, [bbl]. We = ct * Wi * deltaP.

Calculates instantaneous water influx rate (Schilthuis), [bbl/day]. qw = C * (pi - p).

Calculates dimensionless radius for VEH aquifer, [dimensionless]. reD = ra / rr.

Calculates dimensionless time for VEH aquifer, [dimensionless]. tD = 0.00634*k*t / (phi*muw*ct*rr^2).

Calculates aquifer constant for VEH model, [bbl/psi]. U = 1.119 * phi * ct * h * rr^2 * (theta/360).

Calculates dimensionless influx for finite aquifer (VEH), [dimensionless].

Calculates dimensionless influx for infinite aquifer (VEH), [dimensionless]. Uses Edwardson correlation.