ACIDIC COMPOUND FOR TREATMENT OF LOW-PENETRABLE TERRIGENIC COLLECTORS AND METHOD FOR ACIDIC TREATMENT OF FACE-ADJACENT BED AREA WITH USE OF SAID COMPOUND Russian patent published in 2004 - IPC

FIELD: oil and gas extractive industry.

SUBSTANCE: compound has chlorine-containing reagent, fluorine-containing regent and fresh water, as chlorine-containing reagent has ammonium chloride or inhibited hydrofluoric acid or ammonium bi-fluoride, or ammonium fluoride and additionally polyglycols and alkylbenzolsulphoacid, containing 12-14 hydrogen atoms in alkyl group, with following ratio of components for main substance, in percents of mass: said alkylbenzolsulphoacid 10-30, said chlorine-containing reagent 1.0-5.0, said fluorine-containing reagent 1.0-5.0, polyglycols 10.0-40.0, fresh water the rest. In method of acidic treatment of face-adjacent area of terrigenic bed, including consecutive pumping of buffer liquid and acidic compound into well, forcing these into bed by buffer liquid, reaction exposure and following removal of reaction products, as acidic compound, compound described above is used or its water solution, received after watering of said compound by fresh water with relation compound : water 1 : 1-5 respectively, in amount 0.5-2.0 m³ for 1 m of perforated bed thickness, as buffer liquid 1.5-3.0% solution of ammonium chloride or oil are used, or diesel fuel as 0.5-1.5 m³ for 1 m of perforated thickness of bed before pumping of acidic compound and in amount 1.0-5.0 m³ - during its forcing, and reaction exposure is no more than 8 hours.

EFFECT: higher efficiency.

2 cl, 4 ex, 3 tbl