METHOD OF DEVELOPING WATER-FLOODED OIL POOL

oil producing industry; applicable in regulation of development of oil deposits, equalization of injectivity profile of injection wells and restriction of inflow of formation water in oil wells. SUBSTANCE: method includes withdrawal of fluid from producing well and periodic injection of sediment-for...

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Bibliographic Details
Main Authors MAZAEV V.V, LYTKIN A.EH, PROKHOROV N.N, GAZIMOV R.R
Format Patent
LanguageEnglish
Russian
Published 10.07.2002
Edition7
Subjects
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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Summary:oil producing industry; applicable in regulation of development of oil deposits, equalization of injectivity profile of injection wells and restriction of inflow of formation water in oil wells. SUBSTANCE: method includes withdrawal of fluid from producing well and periodic injection of sediment-forming reagent of alkaline type into injection wells. Solution of said reagent is injected in two stages. Injected first is a solution with reagent concentration of 0.1-5 wt.% and then, a solution with reagent concentration of 5-25 wt.% is injected. Then, additionally injected is a solution of calcium chloride. Sediment-forming reagent is used in the form of sodium phosphate. Ratio of sodium-phosphate injected at the second stage to calcium chloride is 1:(0.7-1.3). EFFECT: higher efficiency of oil pool development due to increased coefficient of oil displacement, redistribution of filtration flows and development of dead and slightly drained zones. 2 ex
Bibliography:Application Number: RU20000115834