| 摘要 |
FIELD: oil and gas industry. ^ SUBSTANCE: invention refers to oil and gas industry, particularly to isolating zones of loss in oil or gas well during boring and/or operating. Composition of working fluid for water shut-off operations in oil and gas wells by means of successive supply of the said fluid, water and solution of sodium silicate at ratio of sodium silicate solution to the said fluid 1:1 contains alkaline drain of caprolactam production ADCP and additionally 5% of terephtalic acid solution in dimethyl formamide at following contents of components, wt %: ADCP- 25.0-50.0, and the said solution of terephtalic acid - 50.0-75.0. ^ EFFECT: facilitating water shut-off operations in oil and gas wells with reservoir temperature up to 130C. ^ 3 tbl, 7 ex |
