WELL BOTTOM HOLE TREATMENT METHOD Russian patent published in 2004 - IPC

FIELD: petroleum extracting industry. SUBSTANCE: method includes selection of well for treatment, filling the well with a compound for dissolving asphalt, resin or paraffin deposits. Compound is a soluted mixture of heavy pirolysis resin and deproxyamine-157 with a carbonic dissolvent. Method further includes supplying of said compound to bottom hole area under pressure, technological detention and beginning of well operation. Wells are selected with lower layer pressure than the pressure of petroleum gas saturation, supplying speed is selected about 3-4 liters per second, compound solution is used with 0.5-0.9% of water, with deproxyamine-157 amount to heavy pirolysis resin amount relationship of about (0.1-15.0):1. Compound supplying is performed under pressure from technical water. Either before supplying the compound or after technological detention acid solution is supplied into operation area, under pressure from technical water. EFFECT: increased well bottom hole treatment effectiveness due to increasing of extracting well output and restoring of acceleration of supplying well. 4 cl, 3 tbl, 2 ex