PetroCalcHub
Calculators
Reservoir EngineeringPressure Transient Analysis

Skin Factor from Pressure Transient Semilog Analysis

s=1.151(Rp−L+3.23)Rp=Δp1hr/mL=log⁡10(kϕμctrw2)\begin{aligned}s&=1.151(R_p-L+3.23)\\R_p&=\Delta p_{1hr}/m\\L&=\log_{10}\left(\frac{k}{\phi\mu c_tr_w^2}\right)\end{aligned}

Tabular solver

Run the same equation across multiple cases and compare results in one table.

CaseDelta_p_1hrpsimpsi/cyclekmDphifractionmucPc_t1/psir_wftResultAction
1Pending
2Pending
3Pending