FIELD: oil and gas production.
SUBSTANCE: invention relates to gel-forming formulation to shut off water inflow into well for creating insulating shields and can be used to control intake capacity of injecting wells and to increase waterflooding-mediated coverage of formation. Formulation according to invention comprising water-soluble polymer (0.3-1.0%), polyvalent metal salt (0.03-0.1%), ammonium chloride (0.2-1.0%), and water has, polyacrylamide or carboxymethylcellulose as water-soluble polymer, chromium acetate or chromium potassium sulfate as salt, and additionally contains 1.0-10.0% of urea-formaldehyde resin. Invention results in increased quality of insulating properties of formulation and quality of controlling intake profile of injecting wells due to improved strength and adhesion characteristics of formulation with resulting structure of crosslinking gel preserved. Gelation and viscosity time control are also enabled.
EFFECT: improved performance characteristics of formulation.
2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| COMPOSITION FOR KILLING OF WELL | 2007 |
|
RU2357996C1 |
| PROCEDURE FOR DEVELOPMENT OF NON-UNIFORM RESERVOIR | 2010 |
|
RU2431741C1 |
| PROCEDURE FOR DEVELOPMENT OF NON-UNIFORM RESERVOIR | 2010 |
|
RU2424426C1 |
| COMPOSITION FOR ISOLATION OF INFLOWS IN WELL | 2009 |
|
RU2405803C1 |
| METHOD FOR INJECTION WELL INFECTIVITY PROFILE ALIGNING AND WATER IN-FLOW LIMITATION FOR PRODUCTION WELL (VERSIONS) | 2009 |
|
RU2382185C1 |
| COMPOUND FOR CONTROL OF DEVELOPMENT OF OIL DEPOSITS (VERSIONS) | 2009 |
|
RU2429270C2 |
| INJECTIVITY PROFILE CONTROL METHOD FOR INJECTION WELL AND WATER INFLUX RESTRICTION METHOD FOR PRODUCING WELL | 2005 |
|
RU2285785C1 |
| METHOD OF BOTTOM-HOLE REGION LINING | 2010 |
|
RU2467156C2 |
| DEVELOPMENT METHOD OF NON-HOMOGENEOUS OIL FORMATION | 2014 |
|
RU2541973C1 |
| GEL-FORMING COMPOSITION FOR ISOLATION OF WATER INFLUX INTO WELL (VERSIONS) | 2018 |
|
RU2703598C1 |
