METHOD OF WATER-FLOODING OF OIL FORMATION

oil production; applicable for increasing oil recovery from nonuniform permeable formation and reduction of rate of water encroachment of wells. SUBSTANCE: method includes injection of aqueous suspension of polyacrylamide through injection well. Polyacrylamide is preliminarily mixed with powdery cel...

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Bibliographische Detailangaben
Hauptverfasser:	GRAJFER V.I, ZAKHARENKO L.T, GALUSTJANTS V.A, LISOVSKIJ S.N, LEMESHKO N.N
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 production; applicable for increasing oil recovery from nonuniform permeable formation and reduction of rate of water encroachment of wells. SUBSTANCE: method includes injection of aqueous suspension of polyacrylamide through injection well. Polyacrylamide is preliminarily mixed with powdery cellulose ether with degree of substitution by carboxymethyl groups of 0.65-1.45 and degree of polymerization of 600-100. Cellulose ether is used in the form of cross-linked polyacrylamide. Carboxymethyl cellulose-polyacrylamide ratio is from 1:1 to 2:98. EFFECT: higher efficiency of water-flooding process of oil formation and intensified oil recovery due to increased thermal stability of working solutions and their preset rheological properties in mixing with mineralized water. 4 cl, 2 tbl, 1 ex