Function to calculate the hydraulic parameters for Agarwal solution (skin and wellbore storage)

agarwal_skin_calculate_parameters(ptest, par, hydraulic = TRUE)

Arguments

ptest

A pumping_test object

par

A list with the values of slope and intercept (a and t0) of the straight line fitted to the drawdown data using the Cooper-Jacob approach, and the value of skin factor(sigma)

hydraulic

Logical flag to indicate if hydraulic parameters are calculated. If False, the the statistcal parameter (a and t0) are calculated.

Value

A list with

  • Tr: Transmissivity

  • Ss: Storage coefficient

  • cd: Wellbore storage

  • rd: Dimensionless radius

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

Examples

data(papadopulos_cooper)