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Injection Well Capacity & Design

Calculate injectivity index, maximum injection rate before fracturing, and Hall plot slope interpretation.

Reservoir & Well Parameters

Permeability, k (mD)

Net Thickness, h (ft)

Water Viscosity (cp)

Wellbore Radius, rw (ft)

Drainage Radius, re (ft)

Skin Factor

Reservoir Pressure (psi)

Fracture Gradient (psi/ft)

Depth (ft)

Injectivity Index

BPD/psi

Max BHP (frac)

psi

Max Injection Rate

BPD

Hall Plot Slope

psi-day/BBL

Engineering formulas

Injectivity Index: II = (0.00708 * k * h) / (mu * (ln(re/rw) + S)) [BPD/psi]

Max BHP: Pfrac = Fracture Gradient * Depth

Max Rate: Qmax = II * (Pfrac - Pr)

Hall Plot Slope: m = 1/II [psi-day/BBL]. Increasing slope = plugging. Decreasing = fracturing or stimulation.

Need injection well optimization, pattern balancing, or waterflood management?