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
| Title | Year | Author | Number |
|---|---|---|---|
| COMPOSITION FOR TREATING CARBONATE FORMATIONS | 2000 |
|
RU2184224C2 |
| COMPOUND FOR TREATMENT OF CARBONATE FORMATIONS | 2005 |
|
RU2309972C2 |
| ACID TREATMENT OF CARBONATE SEAM | 2013 |
|
RU2535538C1 |
| TREATMENT METHOD OF BOTTOM-HOLE FORMATION ZONE | 2012 |
|
RU2494245C1 |
| METHOD OF TREATMENT OF BOTTOMHOLE FORMATION ZONE | 2014 |
|
RU2566344C1 |
| PROCEDURE FOR ISOLATION OF WATER AND FOR INTENSIFICATION OF OIL INTAKE IN CARBONATE RESERVOIRS | 2010 |
|
RU2408780C1 |
| METHOD FOR TREATMENT OF HETEROGENEOUS FORMATION | 1988 |
|
RU1607481C |
| COMPOSITION FOR TREATMENT OF BOTTOM-HOLE ZONE OF CARBONATE RESERVOIR | 2019 |
|
RU2731302C1 |
| METHOD OF TREATING BOTTOM ZONE OF NONUNIFORM OIL BED | 1994 |
|
RU2065951C1 |
| COMPOSITION FOR TREATMENT OF BOTTOMHOLE CARBONATE FORMATION ZONE | 2003 |
|
RU2254463C1 |
