METHOD FOR RAISING OUTPUT OF OIL BED IN MULTIPLE-BED DEPOSIT Russian patent published in 2000 - IPC

FIELD: oil production industry. SUBSTANCE: method can be used for intensification of oil recovery in producing wells and for increasing injectivity in injection wells. Method for raising output of oil bed implies cleaning of bottom-hole zone of bed by successive injection into it of solutions containing increasing concentration of surface-active matter which is solving in muriatic acid or creating fine-dispersive stable system with muriatic acid, then bringing well to mode of operation effected after preliminary temporary blocking of high-permeable zone of bed by means of stabilized oil emulsion with period of stabilization corresponding to period of treating and bringing well to mode of operation, and achieved due to introduction into oil emulsion of surface-active matter used for cleaning of bottom-hole zone of bed. Application of method allows for temporary isolation of watered beds with retention of their permeability together with increasing productivity factor of remaining low-permeable oil beds. EFFECT: higher efficiency. 1 ex