DRY-ACIDIC COMPOSITIONS FOR TREATING TERRIGENOUS RESERVOIRS AND DE-ARGILIZATION OF WELL BOTTOM ZONE

摘要

The invention relates to oil and gas producing industry, in particular to acidic treatment of terrigenous reservoirs and de-argilization of formations. The acidic composition does not form sediments when mixing with stratal minerilized water and has low corrosive activity. A dry-acidic composition for treating terrigenous reservoirs and for de-argilization of well bottom zone comprises ammonium fluoride or ammonium bifluoride or ammonium bifluoride fluoride, sulfanic acid, phosphoro-containing complexon – a phosphonic acid derivative such as oxyethylidenphosphonic (OEDP) or nitriletrimethylphosphonic (NTP) acids, and ammonium chloride with the following amount thereof in aqueous solution of the dry-acidic composition, wt %: