Systematic inmplementation of acid treatment of hydrocarbon wells may bring customers thousands of percents of profit and boost production in short time. The technology of using synthetic hydrochloric acid for bottomhole treatment in production and injection wells was for the first time tried in the late 19th century. Some publications date it back to 1895. To date, virtually all oilfield service leaders like Baker Hughes, Schlumburger, Halliburton, MacDermot, BJ Services and others have designed, patented and now successfully apply treatment of hydrocarbon wells with their own acid solutions based on pure synthetic hydrochloric acid with a number of complex additives, which provide for long-term increase in well flow rates, preservation of reservoir properties of formations, protection of O&G equipment from corrosion.