neuzil_solution_dlogt: neuzil_solution_dlogt

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

Description

Function to calculates the derivative of neuzil solution

Usage

neuzil_solution_dlogt(ptest, cd, t0, t)

Arguments

ptest	A pumping_test object
cd	Value of the wellbore storage coefficient (cd)
t0	Intercept
t	A Numeric vector with time

Value

A numeric vector with the derivative of drawdown

Author(s)

Oscar Garcia-Cabrejo [e-mail]

References

Neuzil, C. E. On conducting the modified 'Slug' test in tight formations. Water Resources Research, 1982, 18, 2, 439-441

See Also

Other neuzil functions: neuzil_WF_LT, neuzil_calculate_parameters, neuzil_solution_initial, neuzil_solution, neuzil_well_function

Examples

data(neuzil)
ptest.neuzil <- pumping_test("Well1", Q = 0, r = 0.0, t = neuzil$t, s = neuzil$s)
par <- list(rw = 0.067, ceff = 2.723e-9, vs = 1.59)
ptest.neuzil$additional_parameters <- par
sol0 <- neuzil_solution_initial(ptest.neuzil)
sol_dlogt <- neuzil_solution_dlogt(ptest.neuzil, sol0$cd, sol0$t0, ptest.neuzil$t)
print(sol_dlogt)

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