Matrix Acidizing in Carbonate Formations

Matrix acidizing in carbonate reservoirs is a process that has been long used to increase productivity oil and gas producing formations. The main goal create wormholes bypass the damage formation. Hydrochloric acid (HCl) for this; however, it several disadvantages affect success of these treatments. Its high reaction rate, inability divert, corrosive nature are few reasons why research this area focused on finding alternative fluids. This paper discusses studies successful alternatives HCl. It observed emulsified acids, which work with addition surfactant HCl, have shown positive results as their viscosity allows them retard rate between rock form effective dominant wormholes. needed, especially high-temperature environments. As HCl also lacks ability divert low-permeability zones highly heterogeneous formations, acids helpful task. While viscoelastic surfactants found be less susceptible since they do not any polymer content, diversion performance acids. Corrosion one greatest most expensive issues faced matrix use corrosion inhibitors proposed best way deal problem. Inorganic no longer an option extremely toxic pose great danger environment. Organic 1970s. However, organic compounds still hazard use. Natural extracts inhibition ability. henna extract aqueous garlic peel lower rates compared some conventional inhibitors.