PO.FPP.Field.Rate Function

Description:

Calculates field production rate at time t using buildup-plateau-decline model. Linear ramp during buildup, constant rate during plateau, Arps decline after. Supports exponential (b=0), hyperbolic (0<b<1), and harmonic (b=1) decline.

Excel Function Syntax:

=PO.FPP.Field.Rate(t_buildup, t_plateau, Q_plateau, Di, b, t)

Parameters:

Parameter	Description
t_buildup	Time from first production to plateau, [T]
t_plateau	Duration of plateau period, [T]
Q_plateau	Plateau production rate, [L³/T]
Di	Initial decline rate after plateau, [1/T]
b	Arps b-factor: 0=exponential, 0-1=hyperbolic, 1=harmonic
t	Query time, [T]