METHOD OF TREATING OIL BED Russian patent published in 1999 - IPC

FIELD: oil and gas production. SUBSTANCE: method includes successively pumping in aqueous solutions of aluminum chloride and alkali, the latter solution additionally containing vat residues from synthetic glycerol production (polyglycerol) and, possibly, anionic surfactant. Edges are pumped in by pairs of portions, number of pairs being at least three. Volume ratio of reagents in edges is as follows: aluminum chloride/(alkali plus surfactant)/polyglycerol = (2-3): 1: 1 with 5-10 wt % concentration of aluminum chloride and alkali and 100% polyglycerol, provided that total concentration of surfactant in disperse system is of order of 0.5%. EFFECT: increased oil bed treatment efficiency due to improved rheological properties of isolation system and increased affected bed volume. 3 dwg, 1 tbl