Ann: Block 9, Alameda-3 Appraisal Update, page-570

https://petroshine.com/matrix-acidizing/
Understanding Matrix AcidizingMatrix acidizing is a well stimulation technique that tries to increase the flow of oil or gas from reservoir rocks by dissolving the formation matrix and establishing new channels. It involves the injection of acid, typically hydrochloric acid, into the reservoir formation at high pressure. The acid reacts with the rock, primarily carbonate formations, and dissolves the minerals, thereby creating wormholes or channels that connect the wellbore to the reservoir. This process effectively increases the permeability of the reservoir and enhances production rates.