Excel Function
ModifiedHyperbolicDeclineRate
Description:
Calculates rate using modified hyperbolic production decline curve. Units of volume [L3] and time [T] must be consistent.
Excel Function Syntax:
=ModifiedHyperbolicDeclineRate(Qi, Di, Dlim, b, time)
Parameters:
| Parameter | Description |
|---|---|
| Qi | Initial rate, [L3/T]. |
| Di | Initial decline rate, [1/T]. |
| Dlim | Decline rate limit when switch to exponential decline occurs, [1/T]. Dlim <= Di. |
| b | Degree of the line curvature, [dimensionless]. |
| time | Time, [T]. |
Related Theory
1 item
Modified Hyperbolic Decline Model
Decline Models
Related Functions
5 items
ModifiedHyperbolicDeclineCumulative
Calculates cumulative production using modified hyperbolic production decline curve. Units of volume [L3] and time [T] must be consistent.
ModifiedHyperbolicDeclineEUR
Estimated Ultimate Recovery (EUR) to an economic rate limit for modified hyperbolic decline, [L3]. Returns cumulative production up to the time the rate reaches the economic limit.
ModifiedHyperbolicDeclineFitParameters
Fit Modified Hyperbolic decline to rate-time data and return parameters as a row array [Qi, Di, Dlim, b].
ModifiedHyperbolicDeclineTime
Time to reach an economic rate limit for modified hyperbolic decline, [T]. Returns the time when the production rate falls to the specified economic limit.
ModifiedHyperbolicDeclineWeightedFitParameters
Weighted fit of Modified Hyperbolic decline to rate-time data and return parameters as a row array [Qi, Di, Dlim, b].