METHOD INCREASING PRODUCTIVITY OF OIL WELL Russian patent published in 2000 - IPC

FIELD: oil industry, treatment of face zone of operational well. SUBSTANCE: process includes pumping of fringe of gas and liquid mixture into well and subsequent running-in of well. Fringe of gas and liquid mixture is pumped in volume from 0.5 to 1.0 volume of pores of seam in its face zone with proportion of content of gas phase from 0.25 to 6.0 with reference to liquid under seam conditions. After this gas fringe made of non-explosive gas or mixture of such gases and liquid fringe of heat transfer agent are pumped in turn. Volume of gas fringe under seam conditions amounts to not less than volume of heat transfer agent. Later specified liquid fringe is forced through into seam with liquid to ensure plugging of well. Well is run in by pumping away of plugging liquid and subsequent formation of deep depression on seam while gas agent is pumped up into hole clearance till gas or gas fringe breaks into the latter. EFFECT: increased efficiency of removal of contaminating structures from well. 1 dwg