FIELD: oil production. SUBSTANCE: in process of treatment of face zone of well is irrigated with solvent of asphalt-pitch-paraffin sediments and solvent is forced by oil into face zone of well. Well with intake capability not less than 30 cu.m/day is chosen for treatment of face zone. Solvent carrying 3.0-6.0-% solution of mixture of heavy pyrolysis pitch and diproxamine in proportion (9-11):1 in organic solvent is employed as solvent of asphalt-pitch-paraffin sediments. Production string and string of pump-and- compressor pipes are filled up to depth of lowering of pump by solvent during irrigation, after it well fluid is forced by solvent into face zone till well is filled with solvent. Heater is run into perforation interval and solvent in perforation interval is heated to temperature of 80-90 C. Then heater is removed from well. Heated solvent is forced into face zone by oil in volume of 1.5-2.5 cu.m/m of perforation interval. Technological stop-down with shut-off well is carried out in the course of 12-24 h and then well is put in production. EFFECT: increased efficiency of treatment and increased productivity of well.
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Authors
Dates
2000-02-27—Published
1999-08-09—Filed