Functions for Arps decline-curve analysis on oil and gas data. Includes exponential, hyperbolic, harmonic, and hyperbolic-to-exponential models as well as the preceding with initial curtailment or a period of linear rate buildup. Functions included for computing rate, cumulative production, instantaneous decline, EUR, time to economic limit, and performing least-squares best fits.
aRpsDCA provides R implementations of functions for carrying out Arps decline-curve analysis on oil and gas production data.
aRpsDCA currently implements the following decline-curve types:
aRpsDCA provides functions for
aRpsDCA is released under the LGPL v2.1 and is free for commercial and non-commercial use.
The current "released" version of aRpsDCA is 1.1.1 and is available from CRAN.
The current pre-release version of aRpsDCA can also be installed from github using the devtools library:
install.packages('devtools')
devtools::install_github('derrickturk/aRpsDCA')
Release notes:
v1.0.0 (2014-04-03): initial release
v1.0.1 (2015-06-21): S3 methods for formatting now correctly print curve family; handling of Np for D = 0 is corrected
v1.0.2 (2016-01-06): evaluation of hyperbolic-to-exponential declines with Di = Df now handled correctly
v1.1.0 (2016-04-04): Arps declines with linear initial buildup periods, and fitting to interval-volume data; additional bug fixes for daily data and better initial guesses for decline parameters
v1.1.1 (2017-07-23): EUR for declines with buildup now handled correctly; zero results from arps.q and arps.Np when decline with buildup was passed with only post-buildup time values are now corrected
(c) 2017 dwt | terminus data science, LLC