Excel Function
DuongDeclineRate
Description:
Calculates rate using Duong decline model, [L3/T]. Units of volume [L3] and time [T] must be consistent.
Excel Function Syntax:
DuongDeclineRate(a, m, q1, qInf, time)
Online Calculator:
| Parameter | Value | Description |
|---|---|---|
| a | Intercept constant a, [1/T]. | |
| m | Slope parameter m, [dimensionless]. | |
| q1 | Theoretical rate at t=1, [L3/T]. | |
| qInf | Asymptotic late-time rate q∞, [L3/T]. | |
| time | Time, [T]. | |
| Result |
Related Functions
5 items
DuongDeclineCumulative
Calculates cumulative production using Duong decline model, [L3]. Units of volume [L3] and time [T] must be consistent.
DuongDeclineTime
Time to reach an economic rate limit for Duong decline, [T]. Returns the time when the rate falls to the specified limit.
DuongDeclineEUR
Estimated Ultimate Recovery (EUR) to an economic rate limit for Duong decline, [L3].
DuongDeclineFitParameters
Fit Duong decline to rate-time data and return parameters as a row array [a, m, q1, qInf].
DuongDeclineWeightedFitParameters
Weighted fit of Duong decline to rate-time data and return parameters as a row array [a, m, q1, qInf].