METHOD OF WELL COMPLETION Russian patent published in 2002 - IPC

FIELD: oil and gas producing industry; applicable in well tapping. SUBSTANCE: in well completion, selected for tapping is formation with low pressure. Well is cased, and annulus is cemented. Well is filled with fluid to increase hydrostatic pressure over formation pressure. Well bottom is filled with aqueous solution of surfactant with intensifying component. Longitudinal slots are punctured in casing string, within interval of producing formation. After formation of longitudinal slots, jet fluid for washing out of caverns in annular space is used in the form of aqueous solution of surfactant with intensifying component. Speed of motion of jet type nozzle is maintained within 15-25 mm/min and jet fluid flow rate of 2-3 l/s with wellhead pressure of 12-15 MPa. After washing out of cavern in annular space, well is let to stand for technological purposes, and then well is completed. EFFECT: increased productivity of wells in zone of formations with low formation pressure. 1 ex