FIELD: oil and gas industry, particularly bottomhole formation zone treatment.
SUBSTANCE: method involves serially or simultaneously injecting aqueous acetic ester solution and water plugs in formation; holding the plugs in formation to form acetic acid in formation and to provide acetic acid reaction with formation rock; bringing well into operation. 20% aqueous acetic ester solution mixed with 3% of hydrochloric acid is used. Ratio between aqueous solution and water plugs is 1:1.4-4 in dependence of formation temperature.
EFFECT: increased simplicity and reduced costs due to cheap available reagent usage, increased intensity of oil and water production due to progressive acid forming in formation, increased radius of formation interval to be treated, elimination of oil-field equipment and improved acid treatment.
3 ex, 3 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF BOTTOMHOLE ACIDISING | 2008 |
|
RU2395682C2 |
| METHOD FOR NONUNIFORM PERMEABLE CAVERNOUS FRACTURED RESERVOIR DEVELOPMENT | 2004 |
|
RU2276257C2 |
| COMPOSITION FOR ACID TREATMENT OF BOTTOMHOLE ZONE OF CARBONATE RESERVOIRS | 2023 |
|
RU2810383C1 |
| FORMULATION FOR TREATING CRITICAL AREA OF CARBONATE RESERVOIR AND A METHOD OF ACID TREATMENT OF CRITICAL AREA OF FORMATION | 2005 |
|
RU2293101C1 |
| METHOD FOR PROCESSING BOTTOMHOLE FORMATION ZONE | 2014 |
|
RU2583104C1 |
| METHOD OF TREATING BOTTOM ZONE OF LOW-PERMEABLE OIL RESERVOIRS | 2003 |
|
RU2244111C1 |
| WATER-IN-OIL EMULSION FOR TREATMENT OF BOTTOM-HOLE FORMATION ZONE | 1992 |
|
RU2019688C1 |
| METHOD OF ACID TREATMENT OF UNDERGROUND BEDS | 1994 |
|
RU2122633C1 |
| METHOD FOR DEVELOPING OIL DEPOSITING CARBONATE COLLECTORS OF FISSURE-CAVITY TYPE | 1992 |
|
RU2073791C1 |
| PROCEDURE FOR DEVELOPMENT OF NON-UNIFORM OIL RESERVOIR | 2009 |
|
RU2394155C1 |
