Duong Functions
Duong (2011) fracture-flow decline for fracture-dominated unconventional wells.
6 functions
PO.DCA.Duong.Rate(q1, Qinf, a, m, time)
Calculates rate using Duong decline model, [L3/T]. Units of volume [L3] and time [T] must be consistent.
PO.DCA.Duong.Prod(q1, Qinf, a, m, time)
Calculates cumulative production using Duong decline model, [L3]. Units of volume [L3] and time [T] must be consistent.
PO.DCA.Duong.Time(q1, Qinf, a, m, Q_econ)
Time to reach an economic rate limit for Duong decline, [T]. Returns the time when the rate falls to the specified limit.
PO.DCA.Duong.EUR(q1, Qinf, a, m, Q_econ)
Estimated Ultimate Recovery (EUR) to an economic rate limit for Duong decline, [L3].
PO.DCA.Duong.Fit(times, rates)
Fit Duong decline to rate-time data and return parameters as a column array [q1, qInf, a, m].
PO.DCA.Duong.WFit(times, rates, weights)
Weighted fit of Duong decline to rate-time data and return parameters as a column array [q1, qInf, a, m].