Unconventional Decline Models Functions

Calculates production rate using Transient Hyperbolic Model. Units of volume [L3] and time [T] must be consistent.

Calculates cumulative production using Transient Hyperbolic Model. Units of volume [L3] and time [T] must be consistent.

Time to reach an economic rate limit for Transient Hyperbolic Model, [T].

Estimated Ultimate Recovery (EUR) to an economic rate limit for Transient Hyperbolic Model, [L3].

Fit Transient Hyperbolic Model to rate-time data and return parameters as a column array [Qi, Di, bi, bf, telf].

Weighted fit of Transient Hyperbolic Model to rate-time data and return parameters as a column array [Qi, Di, bi, bf, telf].

Calculates production rate using Power Law Exponential (PLE) rate decline model. Units of volume [L3] and time [T] must be consistent.

Calculates cumulative production using Power Law Exponential (PLE) rate decline model. Units of volume [L3] and time [T] must be consistent.

Time to reach an economic rate limit for Power Law Exponential (PLE) decline, [T]. Returns the time when the production rate falls to the specified economic limit.

Estimated Ultimate Recovery (EUR) to an economic rate limit for Power Law Exponential (PLE) decline, [L3]. Returns cumulative production up to the time the rate reaches the economic limit.

Fit Power Law Exponential (PLE) decline to rate-time data and return parameters as a column array [Qi_intercept, Di_intercept, D_inf, n].

Weighted fit of Power Law Exponential (PLE) decline to rate-time data and return parameters as a column array [Qi_intercept, Di_intercept, D_inf, n].

Calculates production rate using Stretched Exponential decline model. Units of volume [L3] and time [T] must be consistent.

Calculates cumulative production using Stretched Exponential decline model. Units of volume [L3] and time [T] must be consistent.

Time to reach an economic rate limit for Stretched Exponential decline, [T].

Estimated Ultimate Recovery (EUR) to an economic rate limit for Stretched Exponential decline, [L3].

Fit Stretched Exponential decline to rate-time data and return parameters as a column array [Qi, Tau, N].

Weighted fit of Stretched Exponential decline to rate-time data and return parameters as a column array [Qi, Tau, N].

Calculates production rate using Extended Exponential Decline Model (EEDM). Units of volume [L3] and time [T] must be consistent.

Calculates cumulative production using Extended Exponential Decline Model (EEDM). Units of volume [L3] and time [T] must be consistent.

Time to reach an economic rate limit for Extended Exponential Decline Model (EEDM), [T].

Estimated Ultimate Recovery (EUR) for Extended Exponential Decline Model (EEDM). Returns Q0/BetaL (approximate EUR based on terminal decline), [L3].

Fit Extended Exponential Decline Model (EEDM) to rate-time data and return parameters as a column array [Q0, BetaL, BetaE, n].

Weighted fit of Extended Exponential Decline Model (EEDM) to rate-time data and return parameters as a column array [Q0, BetaL, BetaE, n].

Calculates rate using Duong decline model, [L3/T]. Units of volume [L3] and time [T] must be consistent.

Calculates cumulative production using Duong decline model, [L3]. Units of volume [L3] and time [T] must be consistent.

Time to reach an economic rate limit for Duong decline, [T]. Returns the time when the rate falls to the specified limit.

Estimated Ultimate Recovery (EUR) to an economic rate limit for Duong decline, [L3].

Fit Duong decline to rate-time data and return parameters as a column array [q1, qInf, a, m].

Weighted fit of Duong decline to rate-time data and return parameters as a column array [q1, qInf, a, m].

Calculates production rate using Logistic Growth Model (LGM). Units of volume [L3] and time [T] must be consistent.

Calculates cumulative production using Logistic Growth Model (LGM). Units of volume [L3] and time [T] must be consistent.

Time to reach an economic rate limit for Logistic Growth Model (LGM), [T].

Estimated Ultimate Recovery (EUR) for Logistic Growth Model (LGM). Returns K (carrying capacity), [L3].

Fit Logistic Growth Model (LGM) to rate-time data and return parameters as a column array [K, a, n].

Weighted fit of Logistic Growth Model (LGM) to rate-time data and return parameters as a column array [K, a, n].

Calculates production rate using Ansah-Knowles-Buba (2000) semi-analytical decline model for bounded reservoirs. Units of volume [L3] and time [T] must be consistent.

Calculates cumulative production using Ansah-Knowles-Buba (2000) semi-analytical decline model for bounded reservoirs. Units of volume [L3] and time [T] must be consistent.

Time to reach an economic rate limit for Ansah-Knowles-Buba (2000) decline, [T]. Returns the time when the production rate falls to the specified economic limit.

Estimated Ultimate Recovery (EUR) to an economic rate limit for Ansah-Knowles-Buba (2000) decline, [L3]. Returns cumulative production up to the time the rate reaches the economic limit.

Fit Ansah-Knowles-Buba (2000) decline to rate-time data and return parameters as a column array [Qi, Alpha, Beta].

Weighted fit of Ansah-Knowles-Buba (2000) decline to rate-time data and return parameters as a column array [Qi, Alpha, Beta].