FIELD: drilling of wells.
SUBSTANCE: invention relates to acidification of a subterranean formation through which a wellbore extends. Method of acidifying a subterranean formation through which a wellbore passes, comprising steps of pumping into a wellbore at pressure below pressure, wherein cracks are formed in the subterranean formation, treating a fluid medium having a first viscosity and containing an aqueous acid solution and a gelling agent of the reduced structural formula, creation in said underground formation of at least one cavity under treatment of fluid medium and exposure to second viscosity of treatment fluid medium greater than first viscosity. Invention is developed in dependent items of the formula.
EFFECT: technical result is higher efficiency of treatment of underground formation.
10 cl, 5 dwg, 6 tbl, 5 ex
| Title | Year | Author | Number |
|---|---|---|---|
| SELF-DIVERTING ACID SYSTEM | 2017 |
|
RU2745681C2 |
| SALT OF MONOCHLOROACETIC ACID WITH A CHELATING AGENT FOR DELAYED ACIDIFICATION IN THE PETROLEUM INDUSTRY | 2019 |
|
RU2763498C1 |
| METHOD AND LIQUID FOR IMPROVEMENT OF PERMEABILITY OF SANDSTONE FORMATIONS BY CHELATING AGENT | 2011 |
|
RU2627787C2 |
| PROCESSING ILLITE FORMATIONS WITH CHELATING AGENT | 2011 |
|
RU2582605C2 |
| GEL-FORMING LIQUIDS CONTAINING QUATERNARY AMMONIUM SALTS AS GEL TIME MODIFIERS AND METHODS OF THEIR USE | 2012 |
|
RU2517342C2 |
| EMULSIONS CONTAINING WATER-SOLUBLE AGENTS, RETARDING ACID REACTION, AND METHODS OF THEIR PRODUCTION AND APPLICATION | 2016 |
|
RU2736755C2 |
| WATER INFLUX ELIMINATION AGENT FOR USE IN OIL FIELDS | 2016 |
|
RU2693105C2 |
| SPECIAL LIQUID CONTAINING CHELATING AGENT FOR CARBONATE FORMATIONS TREATMENT | 2011 |
|
RU2618789C2 |
| THICKENED VISCOELASTIC FLUID MEDIA AND THEIR APPLICATION | 2012 |
|
RU2598959C2 |
| SYSTEMS AND METHODS OF OIL AND/OR GAS PRODUCTION | 2011 |
|
RU2574645C2 |
