Radial Darcy Flow, Skin Factor & Flow Efficiency Calculator

Determine steady-state oil production rate ($q$), Hawkins near-wellbore skin factor ($s$), additional drawdown loss ($\Delta p_s$), and Flow Efficiency ($FE$).

Formation & Fluid Properties

Permeability k (mD):

Net Pay Thickness h (ft):

Reservoir Pressure p_e (psi):

Bottomhole Flowing P_wf (psi):

Oil Viscosity μ (cP):

Oil FVF B_o (rb/stb):

Drainage Radius r_e (ft):

Wellbore Radius r_w (ft):

Total Skin Factor (s): s > 0: damaged, s = 0: ideal, s < 0: stimulated/fractured

Production Rate & Skin Pressure Drop

Actual Flow Rate (q_actual)

Skin Pressure Drop (Δp_skin)

Flow Efficiency FE

Damage Ratio DR

Productivity Index J

Well Stimulation Opportunity

Acidizing or hydraulic fracturing could recover up to -- stb/day.

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Radial Darcy Flow, Skin Factor & Flow Efficiency Calculator

Formation & Fluid Properties

Production Rate & Skin Pressure Drop

Frequently Asked Questions