Abstract:

The article provides a brief analysis of the main factors that cause the need and determine the effectiveness of acid treatment of wells and at the same time, often leveling their success. The clogging of the bottomhole formation zone with solid inorganic particles and organic sediments, as well as the depth of penetration of acidic compounds into the formation and coverage of the acidic bottomhole formation zone, are considered. The compositions for acid treatment of wells (water-based acidic compositions, foam acids, direct acid-containing emulsions and reverse acid-containing emulsions), as well as new acid compositions for re-treatment of wells at a late stage of their operation are described. The methods of hydrochloric acid exposure (acid baths, simple acid treatments and thermo-acid treatment of wells) are shown.

Keywords: effectiveness of acid treatment wells; colmatage of the bottomhole formation zone; depth of penetration of acidic compounds into the reservoir; coverage of the acidic impact of the bottomhole formation zone; acid treatment compositions; methods of hydroch