welltest_pta.mdh_extrapolation

welltest_pta.mdh_extrapolation(p, t_hr, fit_start_frac=0.30, fit_end_frac=0.85)

Linear regression of \(p_{ws}\) vs \(\log_{10}(\Delta t)\) on the IARF window.

Returns dict with slope_m (psi/cycle), intercept_p1hr (extrapolated pressure at \(\Delta t=1\) hr — used for skin), and r2.

Parameters:

• p (ndarray)

• t_hr (ndarray)

• fit_start_frac (float)

• fit_end_frac (float)

Return type:

dict[str, float]