METHOD OF INCREASE OF OIL RECOVER FROM NON-UNIFORM PERMEABLE FORMATIONS AT LATE STAGE OF OIL DEPOSIT DEVELOPMENTS

oil producing industry. SUBSTANCE: method includes injection of working agent and polymer aqueous solution into formation through injection wells and oil withdrawal through producing wells. Polymer aqueous solutions is injected together with cross-linking agent. After allowing to stand for 1-6 days,...

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Hauptverfasser:	IBRAGIMOV N.G, ZHEGLOV M.A, IBATULLIN R.R, KANDAUROVA G.F, KHANNANOV R.G, KHISAMOV R.S, GANEEVA Z.M, JUSUPOV I.G, SHAKIROV A.N, TAKHAUTDINOV SH.F, MUSABIROV R.KH, KUBAREVA N.N, DOBROSKOK B.E, SALIKHOV I.M, JAKOVLEV S.A
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY DYES EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MINING MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PAINTS POLISHES
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Beschreibung
Zusammenfassung:	oil producing industry. SUBSTANCE: method includes injection of working agent and polymer aqueous solution into formation through injection wells and oil withdrawal through producing wells. Polymer aqueous solutions is injected together with cross-linking agent. After allowing to stand for 1-6 days, injected additionally is low-concentrated aqueous solution of sodium carboxymethyl cellulose with cross-linking agent, and after 1-6 days of standing, working agent is additionally injected. Before, during and after injection of polymer aqueous solution with cross-linking agent, or together with polymer solution with cross-linking agent, filling agent is injected. EFFECT: increased oil recovery from oil pool. 2 cl, 5 ex