METHOD OF OIL RECOVERY FROM FORMATION

oil producing industry, particularly, methods of oil recovery from formations with use of displacing agents in form of alkali solutions. SUBSTANCE: method includes oil displacement from formation to producing well by cyclic injection of still waste and sewage water. Still water is injected with pH 5...

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Bibliographische Detailangaben
Hauptverfasser:	RAMAZANOVA A.A, GAFUROV O.G, ALMAEV R.KH, LADIN P.A, MUKHAMETSHIN M.M, BAZEKINA L.V, GARIFULLIN SH.S
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	oil producing industry, particularly, methods of oil recovery from formations with use of displacing agents in form of alkali solutions. SUBSTANCE: method includes oil displacement from formation to producing well by cyclic injection of still waste and sewage water. Still water is injected with pH 5.5-7.0 in amount of 0.04-0.09 of pore volume washed with water, and sewage water with density of, at least, 1100 kg/cu.m in amount of 0.017-0.03 of pre volume washed with water, and still water-sewage water ratio in each cycle amounts to 2:1 to 5:1. EFFECT: higher displacement efficiency, reduced water cutting of well production and increased coverage of formation with flooding. 2 dwg, 3 tbl, 2 ex