ACOUSTIC METHOD OF STIMULATION OF WELL AND BED OF MINERAL DEPOSIT Russian patent published in 1999 - IPC

FIELD: mining of minerals by borehole method; applicable in oil, gas, mining and geological exploration industries, especially in technology of recovery of oil and gas, particularly, in rehabilitation operations on wells and formations (acoustic rehabilitation of well and bed) for increase of oil recovery of beds and intensification of oil recovery. SUBSTANCE: method includes operations of complex acoustic stimulation of well perforated zones. Interval of perforation and bed producing strata are treated successively and selectively by directed acoustic field. Pressure, time and distance of stimulation are combined. Use is made of signals of sound and ultrasound ranges with direction characteristics up to 180 deg, acoustic pressure values from minimal values required for introduction of changes in well current operation, up to maximum values restricted by ranges of rock elasticity. Duration of stimulation equals effective time of stimulation. Distance of stimulation equals initial effective distance of stimulation from 0.05 to 10 m. Stimulation may be effected successively by three acoustic signals. Combination of sequence of these signals is also possible. Method allows unified complex stimulation on all types of wells with various types of operation, found in operating or idle state. EFFECT: increased oil recovery from beds and intensified oil recovery. 3 cl, 13 dwg