Acid composition of well treatment in carbonate and terrigenous reservoirs and method for acidizing bottomhole formation zone with its use

摘要

1. Acidic composition for acidizing production and injection wells in carbonate and clastic reservoirs containing hydrochloric acid, alkylbenzenesulfonic acid, the alkyl group containing 12-14 carbon atoms, citric acid, acetic acid, methanol, OC-20 formulation, the type of corrosion inhibitor "CGI-118" and water, characterized in that it further comprises urotropin and may comprise a fluorine-stovodorodnuyu acid and iron type stabilizer "Feriks", with the following component ratio, wt%:. 2. Method carbonate acidizing well bottom zone, or mixed terrigene formation comprising pumping into the well an acidic composition in an amount of 1.0-5.0 m mna 1 apertured layer thickness, pro-crush it into the reservoir, the shutter speed at the reaction for no more than 8 hours and subsequent removal of reaction products, characterized in that the composition is used as the acid composition according to claim 1, as well as its solutions in fresh water at a ratio of composition: fresh water, of 1: 1-1: 2, sootvetstvenno.3. Method carbonate acidizing well bottom zone, or mixed terrigene reservoir according to claim 2, characterized in that it comprises pre-download into the wellbore the whipstock liquid in an amount of 0.5-2.5 m mna 1 apertured layer thickness, thus as a liquid -otklonitelya uses hydrocarbon-based gel complex gelling "Himeko-H" and diesel fuel.