FIELD: oil production industry, particularly acid terrigenous reservoir treatment and clay removal from well bottom zone.
SUBSTANCE: dry acid composition comprises ammonium fluoride or ammonium bifluoride or ammonium fluoride-bifluoride, sulfanic acid, phosphor-containing complexing agent, namely phosphonic acid derivative and salmiac taken in the following amounts in aqueous dry acid solution (% by weight): ammonium fluoride - 0.56-18.5, ammonium bifluoride - 0.43-14.25, ammonium fluoride-bifluoride - 0.51-17.00, sulfanic acid in equimolecular ratio, above phosphor-containing complexing agent - 0.01-2.0, salmiac - 0.1-3.0, remainder is water.
EFFECT: increased thermal stability of dry acid composition, prevention of composition sludging after mixing thereof with mineralized water and reduced corrosion activity.
7 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| DRY-ACID COMPOSITION FOR BOTTOMHOLE WELL ZONE TREATMENT AND SCALE REMOVAL | 2016 |
|
RU2652047C1 |
| SOLID BASE OF COMPOUND FOR ACID TREATMENT OF TERRIGENOUS RESERVOIR | 2007 |
|
RU2333235C1 |
| ACIDIC COMPOSITION FOR TERRIGENOUS RESERVOIRS TREATMENT AND SCALE ELIMINATION (VERSIONS) | 2006 |
|
RU2337126C2 |
| BASE OF COMPOSITION FOR OXYGEN TREATMENT OF TERRIGENOUS RESERVOIR AND DECLAYING OF BOTTOMHOLE FORMATION ZONE | 2005 |
|
RU2301248C1 |
| ACID COMPOSITION FOR TREATING TERRIGENOUS RESERVOIRS | 2001 |
|
RU2182963C1 |
| METHOD OF SOUR WELL INTERVENTION IN TERRIOGENOUS RESERVOIR | 2010 |
|
RU2433260C1 |
| ACID COMPOUND FOR TREATING TERRIGENOUS RESERVOIRS | 1996 |
|
RU2101482C1 |
| DRY ACID COMPOSITION FOR ACID TREATMENT OF TERRIGENOUS COLLECTORS | 2020 |
|
RU2752415C1 |
| COMPOSITION FOR PREVENTING FORMATION OF SALT DEPOSITS DURING OIL AND GAS EXTRACTION | 2015 |
|
RU2599150C1 |
| HYDROCHLORIC ACID COMPOSITION FOR TREATMENT AND CLAY CAKE REMOVAL OF BOTTOMHOLE FORMATION ZONE | 2018 |
|
RU2704167C1 |
