DELAYED-ACTION ACID AND GELLING COMPOSITION

• Main Authors: TAKHAUTDINOV R.SH, AKHMADISHIN R.Z, OVCHINNIKOV R.V, KHLEBNIKOV V.N
• Format: Patent
• Language: English; Russian
• Published: 10.12.2002
• Edition: 7
• 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

FIELD: oil producing industry, particularly, compositions based on hydrochloric acid for treatment of carbonate and carbonate-containing formations of oil deposits. SUBSTANCE: delayed-action acid and gelling composition has aluminosilicate, lignosulfonate and hydrochloric acid with the following ratio of components, mas.%: aluminosilicate (in terms of dry matter), 0.5-10.0; lignosulfonate (in terms of dry matter), 0.5-10.0; hydrochloric acid, the balance. Used in composition may be natural or synthetic aluminosilicate, including process wastes; may be also used nepheline, synthetic zeolites, wastes of zeolite production - zeolite slimes, high-alumina cement, etc. EFFECT: higher efficiency of treatment of carbonate reservoirs. 5 tbl, 5 ex