Arps decline conversion from effective to nominal

Description

Convert effective to nominal Arps decline.

Usage

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as.nominal(D.eff,
    from.period=c("year", "month", "day"),
    to.period=c("year", "month", "day"))

Arguments

D.eff

tangent effective Arps decline [1 / time].

from.period

time period for D.eff (default "year").

to.period

time period for result (default "year").

Details

D.eff should be specified in fractional (i.e. 95% = 0.95) units as a tangent effective decline (see SPEE REP#6 [https://secure.spee.org/sites/default/files/wp-files/pdf/ReferencesResources/REP06-DeclineCurves.pdf]).

When appropriate, internally uses rescale.by.time to perform time unit conversion.

Value

Returns the Arps nominal decline rate in units of [1 / to.period].

See Also

as.effective, rescale.by.time.

Examples

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## 95% / year effective decline to nominal daily decline
as.nominal(0.95, from.period="year", to.period="day")