A 3-D Numerical Model for Designing and Planning of Matrix Acid Stimulation in Low-Permeability Rocks

摘要

Based on material balance and theory of surface reactionrnkinetics in porous media, a 3-D numerical model wasrndeveloped to predict changes in rock properties due to acidrnstimulation. The simulator were then verified withrnexperimental results from acidizing test conducted on corernsamples taken from a number of reservoir rocks. It was foundrnthat the simulator could adequately predict spent-acidrnconcentration and changes in porosity and permeability as arnfunction of penetration depth for given acid treatmentrnconditions. We also demonstrated how the numerical modelrncould be used to design and plan acid stimulation work forrngiven reservoir conditions.