Carbonate Acidizing Damköhler Number & Wormhole Calculator

Model reactive dissolution regimes in limestone and dolomite matrix acidizing, calculate Damköhler number (Da), and identify the optimum interstitial injection velocity.

Formation & Acid Injection Inputs

Carbonate Lithology:

HCl Concentration (wt%):

Interstitial Acid Velocity v_i (cm/min): True pore interstitial flow speed

Reservoir Temperature (°C):

Core / Zone Permeability k (mD):

Formation Porosity φ (%):

Dissolution Regime & PVBT Output

Damköhler Number (Da):

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Pore Volume to Breakthrough (PV_bt):

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Optimal Interstitial Velocity v_opt:

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Acid Dissolution Regime:

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Wormhole Propagation Efficiency:

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Péclet Number (Pe):

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Frequently Asked Questions

Why does limestone require faster injection rates than dolomite?

Calcite (limestone) dissolves almost instantaneously in HCl (transport-limited), requiring high injection velocities (typically 1 to 5 cm/min) to reach optimum Da. Dolomite reacts orders of magnitude slower at ambient temperatures, shifting the optimum velocity much lower.

What is Pore Volume to Breakthrough (PVbt)?

PVbt is the ratio of acid volume injected to the total connected pore volume of the treated core when the first wormhole punctures through the exit face. The lower the PVbt, the more efficient the acid treatment.