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).