METHOD FOR INCREASING OIL OUTPUT OF BED Russian patent published in 1999 - IPC

FIELD: oil production industry. SUBSTANCE: this relates to methods for increasing oil recovery from beds in development of deposits by means of flooding. According to method, separately injected into bed are water solution of calcium chloride and emulsion containing petroleum product and water solutions of non-ionogenic surface-active material and salts of polybasic acid. Used in function of water solution of polybasic acid is 0.1-15% solution preferably of sodium silicate or sodium carbonate. Used in function of petroleum product is for example oil or gasoline. Application of aforesaid method enhances efficiency of bed treatment for higher oil recovery. EFFECT: higher efficiency. 2 cl, 1 tbl