Darcy’s Law

Q = (K * A * (P1 - P2)) / (μ * L)

Permeability (K, md): Area (A, ft²): Pressure Difference (P1 - P2, psi): Viscosity (μ, cP): Length (L, ft): Calculate

Flow Rate (Q) = ft³/day

Material Balance Equation (MBE)

Initial Hydrocarbon Volume (N): Produced Volume (Np): Calculate

Remaining Volume =

Z-Factor Calculation

Pressure (P, psi): Temperature (T, R): Calculate

Z-Factor =

Vogel’s Equation

Maximum Flow Rate (qmax): Flowing Bottom Hole Pressure (Pwf): Reservoir Pressure (Pr): Calculate

Flow Rate (q) =

Gas Flow Rate Equation

Coefficient (C): Upstream Pressure (P1, psi): Downstream Pressure (P2, psi): Calculate

Gas Flow Rate (q) =

Bernoulli’s Equation

Pressure at Point 1 (P1, psi): Velocity at Point 1 (v1, ft/s): Elevation at Point 1 (h1, ft): Pressure at Point 2 (P2, psi): Velocity at Point 2 (v2, ft/s): Elevation at Point 2 (h2, ft): Calculate

Bernoulli’s Result =