CARBONATE FORMATION TREATMENT COMPOSITION

FIELD: oil and gas production. ^ SUBSTANCE: invention provides composition for treatment of carbonate formations in order to intensify production of oil and gas from the wells in question, which composition is constituted by 20-22% hydrochloric acid aqueous solution, 42-48%, polyglycol, 4-16%, and a...

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Hauptverfasser:	ABYZBAEV IBRAGIM IZMAJLOVICH, KHAJREDINOV NIL SHAKHIDZHANOVICH, RYLOV EVGENIJ NIKOLAEVICH, KOTENEV JURIJ ALEKSEEVICH, NECHAEVA OL'GA EGOROVNA, ANDREEV VADIM EVGEN'EVICH, SELIMOV FARID ABDURAKHMANOVICH, BOROVIKOV IGOR' BORISOVICH, POLJAKOV IGOR' GENRIKHOVICH, BULDAKOV SERGEJ VJACHESLAVOVICH, ANDREEV ANTON VADIMOVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	ADHESIVES CHEMISTRY DYES MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES
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Beschreibung
Zusammenfassung:	FIELD: oil and gas production. ^ SUBSTANCE: invention provides composition for treatment of carbonate formations in order to intensify production of oil and gas from the wells in question, which composition is constituted by 20-22% hydrochloric acid aqueous solution, 42-48%, polyglycol, 4-16%, and alumina-chloride solution obtained from chemical process waste, which contains 200-300 g/L of main material in solution having pH 0.6-2.0, 42-46%. Treatment with this composition leads to reduced permeability of washed zones of formation and reduced degree of nonuniformity thereof in direction of replacement. ^ EFFECT: reduced reaction rate and dissolution capacity of solution in water-saturated portion of formation accompanied by increase in dissolution capacity of solution in oil-saturated portion of formation. ^ 2 tbl