METHOD FOR ACOUSTIC TREATMENT OF WELLS OF SYSTEM FOR PRESERVATION OF BED PRESSURE Russian patent published in 2004 - IPC

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes prior cleaning of face by washing with water with surfactant until getting pure well liquid. Acceleration profile is determined. In well-adjacent area calculated amount of active technological liquid is forced on basis of soluble surfactants and forced into bed, ultrasound emitter is lowered into perforation zone. Dispersing of colmatants is performed by effecting well-adjacent bed area by ultrasound frequency field in environment of technological liquid. Effecting by field of resilient oscillations is performed by steps in downward direction or upward direction with one meter step and effect time on step from 0.5 to 2.0 hours dependent on loss of well acceleration from project value. Calculated volume of acid is forced. Acid is forced into bed by triple volume of water relative to acid volume. Products of destruction are forced into bed. After acid dissolves dispersed colmatation sediments launch of well is performed for water forcing. Forcing of calculated volume of active technological liquid is performed with tubing pipes lowered to pit-face, and these are not extracted. Before determining acceleration profile and lowering ultrasound emitter into well tubing string is raised above bed ceiling.

EFFECT: higher efficiency of maintenance.

2 cl