FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil and gas industry, in particular, to compositions for isolation of water inflows in production wells, control of processed formation coverage and injectivity profile of injection wells. Gel-forming composition contains 6–10 pts. wt. hydrolyzed polyacrylonitrile, 0.5–1.0 pts. wt. chromium acetate, 1.0–2.0 pts. wt. ammonium sulphate and 100 pts. wt. water.
EFFECT: technical result is higher efficiency of gel-forming composition due to formation of strong gel, which maintains pressure drops in formation, and its stability in fresh or slightly mineralized formation water.
1 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING GEL-FORMING COMPOSITION FOR ISOLATING WATER INFLOWS INTO WELL | 2023 |
|
RU2825087C1 |
| GEL-FORMING COMPOSITION FOR ISOLATION OF WATER INFLUX INTO WELL (VERSIONS) | 2018 |
|
RU2703598C1 |
| METHOD OF WATER INFLOW LIMITATION IN FRACTURED CARBONE RESERVOIRS | 2015 |
|
RU2614997C1 |
| METHOD FOR ISOLATION OF WATER INFLUX IN WELL | 2015 |
|
RU2584193C1 |
| METHOD OF WATER INFLUX ISOLATION IN WELL | 2018 |
|
RU2704168C1 |
| GEL-FORMING FORMULATION TO SHUT OFF WATER INFLOW INTO WELL | 2004 |
|
RU2277573C1 |
| POLYMER COMPOSITION FOR IN-SITU WATER PROOFING OF TERRIGENOUS RESERVOIRS | 2022 |
|
RU2793057C1 |
| METHOD FOR LIMITING WATER INFLUX IN WELL | 2014 |
|
RU2560037C1 |
| METHOD FOR BALANCING INJECTION WELL WATER-INTAKE CAPACITY PROFILE AND RESTRICTION OF WATER INFLUX TO PRODUCTION WELLS | 2011 |
|
RU2456439C1 |
| METHOD OF INJECTION WELLS INPUT PROFILE ALIGNMENT AND PRODUCTION WELLS WATER FLOW LIMITATION | 2008 |
|
RU2375557C1 |
