FIELD: oil production industry. SUBSTANCE: method relates to oil deposits characterized by nonuniform permeability and separation of beds. Created in bed by means of successive injection of water solutions of reagents are high-viscous flow-deflecting barriers. For wider embracing of bed by displacement due to formation of barrier of needed configuration and at given distance from well and insignificant reduction of permeability of bottom-hole zone, following succession of operations is adopted. Preliminary laboratory investigations of viscous, adsorption or adhesive characteristics of individual reagents and their mixtures are performed and reagents are injected in succession according to their reducing sorption with use of separating water interlayers. Dimensions of interlayers are determined by numerical investigation of dual-phase multicomponent flow in nonuniform bed depending on nonuniform permeability and separation of bed and aforesaid characteristics of reagents. EFFECT: high efficiency. 1 cl, 2 tbl, 12 dwg
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Authors
Dates
1997-07-10—Published
1993-07-08—Filed