METHOD OF TREATING NONUNIFORM OIL BED Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: improved efficiency of method is achieved due to levelling of displacement front and involvement in development of bed sections non-covered by draining process. According to method, injected into bed is water-gas mixture with ratio of water and gas volumes equal to 1:1. Periodically after every 12 months counting from start of injecting mixture into bed, performed is recovery from producing wells so as to increase recovery of liquid, and increased is recovery from selected wells. Recovery from producing wells to increase recovery of liquid is carried out at simultaneous observing of following inequalities: r_o>0,5; r_e<0;5;r_g 0,5;, where r_o,r_w,r_g - Spearman coefficient of range correlation respectively between liquid and oil outputs, liquid and water outputs, liquid outputs and monthly values of gas factor in given well, determined according to formulas given in description of invention. EFFECT: high efficiency. 6 tbl