Simulation of Sandstone Acidizing of a Damaged Perforation

Summary A mathematical model was developed to study the effect of acidizing on the productivity of a single perforation penetrating a sandstone reservoir as a function of the distribution of damage around the perforation. Assuming the perforation to be ellipsoidal, we derived a 2D model that describes the single-phase flow of an acid through a perforated sandstone that contains two pseudochemical minerals dissolving at different rates. This paper presents cases that show the effectiveness of acidizing in removing both drilling-fluid damage and perforation damage. The most effective stimulation occurs when the perforation damage is removed by the acid.

Simulation of Sandstone Acidizing of a Damaged Perforation Academic Article