INCREASE OF BOTTOM HOLE ZONE PERMEABILITY USING CHEMICAL REAGENTS

The article examines the use of acid compositions to enhance permeability and improve oil recovery from reservoirs. Injecting acids (such as hydrochloric or sulfuric acid) into productive reservoirs results in their interaction with the rock, leading to mineral dissolution, the formation of soluble salts, and the release of carbon dioxide and heat. Particular attention is given to lowpermeability terrigenous reservoirs, where the use of fluoride-containing acid compositions helps improve the hydraulic conductivity of pore spaces. For effective application of acid technologies, comprehensive well preparation and sequential physicochemical treatment methods are recommended. Additionally, the article highlights the need to develop and apply gel-forming and sediment-forming compositions to equalize reservoir permeability, stabilize oil production, and reduce water influx. The article emphasizes the importance of selecting optimal reagents based on reservoir characteristics and pore structure, particularly in the presence of clay sandstones, to prevent clogging. It proposes further research into the interactions between acid compositions and clay formations, as well as the development of technologies tailored to the specific chemical reactions occurring in reservoirs.