PO.DCA.ModHyp.EUR Function
Description:
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.
Excel Function Syntax:
=PO.DCA.ModHyp.EUR(Qi, Di, Dlim, b, Q_econ)
Parameters:
| Parameter | Description |
|---|---|
| Qi | Initial rate, [L3/T]. |
| Di | Initial nominal decline rate, [1/T]. |
| Dlim | Decline rate limit when switch to exponential decline occurs, [1/T]. Dlim <= Di. |
| b | Hyperbolic exponent, [dimensionless]. |
| Q_econ | Economic rate limit, [L3/T]. |
Used in Blueprints
Modified Hyperbolic Decline
Modified Hyperbolic decline model that transitions from hyperbolic to exponential decline at a specified terminal decline rate. This addresses the unrealistic EUR predictions from pure hyperbolic decline with high b-factors.