Excel Function
ExponentialDeclineTime
Description:
Time to reach an economic rate limit for Arps exponential decline, [T]. Returns the time when the production rate falls to the specified economic limit.
Excel Function Syntax:
ExponentialDeclineTime(Qi, Di, econRate)
Online Calculator:
| Parameter | Value | Description |
|---|---|---|
| Qi | Initial rate, [L3/T]. | |
| Di | Initial nominal decline rate, [1/T]. | |
| econRate | Economic rate limit, [L3/T]. | |
| Result |
Related Functions
5 items
ExponentialDeclineRate
Calculates rate using Arps (1945) exponential decline curve, [L3/T]. Units of volume [L3] and time [T] must be consistent.
ExponentialDeclineCumulative
Calculates cumulative production using Arps (1945) exponential decline curve, [L3]. Units of volume [L3] and time [T] must be consistent.
ExponentialDeclineEUR
Estimated Ultimate Recovery (EUR) to an economic rate limit for Arps exponential decline, [L3]. Returns cumulative production up to the time the rate reaches the economic limit.
ExponentialDeclineFitParameters
Fit Arps exponential decline to rate-time data and return parameters as a row array [Qi, Di].
ExponentialDeclineWeightedFitParameters
Fit Arps exponential decline to rate-time data with weights and return parameters as a row array [Qi, Di].