METHOD OF ISOLATING FLUSHED ZONES IN OIL FORMATION

FIELD: oil-gas producing industry, particularly, methods of isolation of high-permeability water-saturated interlayers in oil formation; applicable in producing and injection wells in workover. SUBSTANCE: method includes injection into well of preventing fluid, cross-linking agent and water inflow s...

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Bibliographische Detailangaben
Hauptverfasser:	SAGIDULLIN I.A, GUMAROV N.F, POLJAKOV V.N, STAROV O.E, ISHKAEV R.K, KHUSAINOV V.M, KHAMINOV N.I
Format:	Patent
Sprache:	eng ; rus
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:	FIELD: oil-gas producing industry, particularly, methods of isolation of high-permeability water-saturated interlayers in oil formation; applicable in producing and injection wells in workover. SUBSTANCE: method includes injection into well of preventing fluid, cross-linking agent and water inflow shutoff. Preventing fluid is used in the form of mixture of oil with emultal. Cross-linking agent used in the form of solution of oil with polyacrylamide. Water inflow is shutoff by successive injection of oil-cement slurry and water-swelling polymer. After holding for allowing cement setting, excessive pressure is built-up in well. EFFECT: increased oil production and formation oil recovery due to higher quality and efficiency of water shutoff jobs. 1 tbl, 1 ex