agarwal_skin_solution_dlogt: agarwal_skin_solution_dlogt

In khaors/pumpingtest: R Package for the analysis and evaluation of pumping tests

Description

Function to calculate the derivative of drawdown with respect to log of time of the Agarwal solution (skin and wellbore storage)

Usage

agarwal_skin_solution_dlogt(ptest, a, t0, sigma, t)

Arguments

ptest	A pumping_test object
a	Slope of the straight line fitted to the drawdown data using the Cooper-Jacob approach
t0	Intercept of the straight line fitted to the drawdown data using the Cooper-Jacob approach
sigma	Value of the skin factor
t	Numeric vector with time

Value

A list with

• x: time coordinates

• y: Derivative value

Author(s)

Oscar Garcia-Cabrejo [e-mail]

References

Agarwal, R.; Al-Hussainy, R. & Ramey, H. An Investigation of Wellbore Storage and Skin Effect in Unsteady Liquid Flow: I. Analytical Treatment. Society of Petroleum Engineers Journal., 1970

See Also

Other agarwal_skin functions: agarwal_skin_WF_LT, agarwal_skin_calculate_parameters, agarwal_skin_solution_initial, agarwal_skin_solution, agarwal_skin_well_function

Examples

data(papadopulos_cooper)

khaors/pumpingtest documentation built on Nov. 15, 2019, 8:10 p.m.