aRpsDCA-package {aRpsDCA}

Arps Decline Curve Analysis in R

Description

Functions for Arps decline-curve analysis. Includes exponential, hyperbolic, harmonic, and hyperbolic-to-exponential models.

Details

Index:

arps	Generic functions for Arps decline curves
arps.eur	EUR and time to economic limit for Arps decline curves
curtail	Arps decline curves with initial rate curtailment
as.effective	Arps decline conversion from nominal to effective
as.nominal	Arps decline conversion from effective to nominal
bestfit	Best-fitting for Arps decline curves
exponential	Arps exponential declines
harmonic	Arps harmonic declines
hyp2exp	Arps hyperbolic-to-exponential declines
hyperbolic	Arps hyperbolic declines
print.arps	Print representations of Arps decline curves
rescale.by.time	Time unit conversion for DCA

Author(s)

Derrick W. Turk | terminus data science, LLC <[e-mail]>

References

SPEE REP#6 (https://secure.spee.org/sites/default/files/wp-files/pdf/ReferencesResources/REP06-DeclineCurves.pdf)

Examples

## Plot semi-log rate-time and Cartesian rate-cumulative
## for a hyperbolic-to-exponential decline
t <- seq(0, 10, 0.5)
q <- hyp2exp.q(5000, as.nominal(0.90), 1.5, as.nominal(0.10), t)
Np <- hyp2exp.Np(5000, as.nominal(0.90), 1.5, as.nominal(0.10), t)

old.par <- par(ask=TRUE)
plot(log(q) ~ t)
plot(q ~ Np)
par(old.par)