Investigation of Acidizing Techniques for Productivity Index Improvement (Hassi Messaoud region).

Abstract

Various types of formation damage can occur in oil and gas wells, resulting from either continuous production or well intervention operations such as workovers, completions, and stimulations. acidizing is a primary stimulation technique implemented to enhance well productivity or injectivity. This is achieved by injecting tailored acid systems into the formation at a pressure strictly below the formation fracturing pressure to effectively dissolve near-wellbore impairment Especially Matrix Acidizing . Based on our field case study of two wells in Hassi Messaoud and Bir Berkine, which exhibit distinct reservoir rock mineralogies and petrophysical properties, each well required a specific acid formulation to optimize damage removal. This targeted treatment successfully restored flow capacity, leading to a substantial increase in the well flow rate and a significant improvement in the Productivity Index (PI).