PO.DCA.THM.D Function

Description:

Calculates instantaneous decline rate D(t) for Transient Hyperbolic Model, [1/T]. Computed analytically.

Excel Function Syntax:

=PO.DCA.THM.D(Qi, Di, bi, bf, telf, time)

Parameters:

Parameter	Description
Qi	Initial rate, [L3/T].
Di	Initial nominal decline rate, [1/T].
bi	Initial hyperbolic exponent (typically 2.0 for linear flow).
bf	Final hyperbolic exponent (boundary-dominated).
telf	Time to end of linear flow, [T].
time	Time, [T].