FIELD: oil and gas production. SUBSTANCE: invention relates to compositions for hydraulic breakdown of formations, killing and conservation of wells, to drilling mud compositions, fluids for perforation and gravel package that can also be used for limiting water inflow into oil and gas wells. Composition, containing fresh or mineralized water, polysaccharide thickener, boric cross-linking agent, diethanolamine, and oxidant component taken from group consisting of ammonium persulfate and alkali metal persulfates, percarbonates, and perborates, contains additionally a quaternary ammonium compound: Catamine AB or waterproofing agent: Neftenol GF in amounts between 0.05 kg and 1 kg per 1000 l water (gel base). EFFECT: extended range of controlled polysaccharide gel destruction of within formation temperature range between 10 C and 950 C. 8 tbl, 4 ex
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Authors
Dates
2001-09-20—Published
1999-04-21—Filed