Water-controlling blockage removing and yield increasing method for oil well of low-pressure bottom water oil reservoir

The invention discloses a water-controlling blockage removing and yield increasing method for an oil well of a low-pressure bottom water oil reservoir. The water-controlling blockage removing and yield increasing method for the oil well of the low-pressure bottom water oil reservoir uses a low-pressure, high-displacement and low-displacing liquid dosage injection technology, uses a short-reaction time and strong-suction flow-back technology and uses low-concentration treating agent (subject acid concentration: 6% of hydrochloric acid and 3% of phosphoric acid, formic acid and acetic acid). In order to control the reaction speed and control treating fluid to enter the stratum deeper even enter the bottom water part, a small dose of low-concentration treating fluid is used, and the treating radius is controlled at 0.5 to 1.0 meters; if the concentration and dose of the treating fluid are large, the dose of the replacing liquid is large, the treating agent is easy to enter the bottom water part, and the water content of the oil well is obviously increased after removing the blockage; the water-controlling blockage removing and yield increasing method for the oil well of the low-pressure bottom water oil reservoir is featured with low-concentration and low-dose treating fluid system, low-pressure, high-displacement and low-displacing liquid dosage injection technology, short-reaction time and strong-suction flow-back technology, high measure success rate and obvious oil increase and water controlling effects.