An Experimental Investigation of the Effect of Magnetic Acid Injection for Increasing Carbonate Core Permeability and Comparison with Regular Acid

Acidizing is one of the effective and common techniques to minimize formation damage. This method is widely used in carbonate reservoirs to increase permeability. The damaging substances are destroyed by acid and the conductive channels are created in the reservoir rocks. But, before acid injection into the reservoir rock, some tests should be carried out on reservoir rock to prevent more complex problems such as emulsion etc. In this study, tests are performed at two different concentrations of 5% and 15% normal hydrochloric acid of and magnetic hydrochloric acid. Magnetic hydrochloric acid is obtained from the dilution of concentrated hydrochloric acid with magnetic water, which is passed from a magnetic field. At a 5% concentration, due to the addition of more magnetic water to dilute hydrochloric acid, the permeability increases significantly compared to the 15% concentration of hydrochloric acid.