METHOD FOR DISCRETE HYDRAULIC FRACTURING OF PRODUCTIVE FORMATION

摘要

A method for discrete hydraulic fracturing of productive formation includes formation of primary and secondary differential pressure. Primary differential pressure is formed before lowering a tubing string to the well, with removal of part of washing liquid with drilled rock from the well till mounting level of remaining washing liquid at height of 5-6 m from the face of well. To form secondary differential pressure impulses of increased pressure are alternated with impulses of decreased pressure that are obtained by suction of fracturing fluid from the formation. The interval of the impulse of decreased pressure makes 1.05-1.2 of the interval of the pulse of increased pressure.