METHOD FOR TREATING BOTTOM-HOLE ZONE OF PRODUCING WELL Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: according to method. well is washed-off by solvent of asphalt-resin and paraffin-hydrate sedimentations with partial pressing-in of this solvent into bottom-hole zone of well. Then undertaken is vacuum-pulse treatment with simultaneous recovering of reaction products. Interval of well productive bed is filled with solution intended for treating bottom-hole zone of well, and this solution is forced down by oil into bottom-hole zone of well. Technological pause is held. Then undertaken is vacuum-pulse treatment with simultaneous recovery of reaction products. Above operations are repeated. At repeating of operations, after each filling of interval of well productive bed with solution intended for treating bottom-hole zone of well, this solution is forced by oil into bottom-hole zone of well. At filling of interval of well productive bed with subsequent portion of solution intended for treating bottom-hole zone of well, volume of this portion is increased by 1.15-1.25 as compared with volume of preceding portion of solution intended for treating bottom-hole zone of well. Application of aforesaid method increases efficiency of treating bottom-hole zone. EFFECT: higher efficiency.