FIELD: oil and gas production.
SUBSTANCE: invention relates to area of acid treatment of terrigenous reservoirs and unmuding of bottomhole formation zone. Acid composition contains 52.85-84.7% mud acid, 10-40% organic solvent mixable both with aqueous phase and with hydrocarbons, 0.2-2.0% surfactant, 5% acetic acid, and 0.10-0.15% hydrophobic silica "Polysil", said organic solvent being selected from isopropyl alcohol, butyl cellosolve, and liquid pyrolysis products. Composition exhibits lowered rate of interaction with reservoir rock, increased wettability of oil/water interface layers, high ability of washing out asphaltic-resinous paraffin deposits, high ability of removing iron hydroxide from treatment zone, and reduced corrosion activity.
EFFECT: improved performance characteristics.
2 cl, 4 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| ACIDIC COMPOSITION FOR TERRIGENOUS RESERVOIRS TREATMENT AND SCALE ELIMINATION (VERSIONS) | 2006 |
|
RU2337126C2 |
| ACID COMPOSITION FOR TREATMENT OF TERRIGENOUS RESERVOIRS (VERSIONS) | 2020 |
|
RU2744899C1 |
| ACIDIC COMPOSITION FOR BOTTOM-HOLE TREATMENT OF OIL RESERVOIR | 2012 |
|
RU2495075C1 |
| METHOD OF MULTI-STAGE TREATMENT OF INJECTION WELL BOTTOMHOLE ZONE IN TERRIGENOUS AND CARBONATE FORMATIONS | 2017 |
|
RU2642738C1 |
| ACID SURFACE-ACTIVE COMPOSITION FOR TREATING BOTTOM-HOLE ZONE OF OIL AND GAS WELLS | 2015 |
|
RU2643050C2 |
| METHOD OF ACIDISING OF HOLEBOTTOM AREA TREATMENT OF TERRIGENOUS COLLECTOR | 2008 |
|
RU2386803C1 |
| ACIDIC COMPOSITION FOR PROCESSING LOW-PERMEABILITY TERRIGENOUS RESERVOIRS | 2008 |
|
RU2386666C1 |
| ACID COMPOUND FOR TREATING TERRIGENOUS RESERVOIRS | 1996 |
|
RU2101482C1 |
| METHOD OF TREATMENT OF BOTTOM-HOLE ZONE OF HIGH- TEMPERATURE LOW-PERMEABILITY SAND RESERVOIRS | 2000 |
|
RU2186962C2 |
| BASE OF COMPOSITION FOR OXYGEN TREATMENT OF TERRIGENOUS RESERVOIR AND DECLAYING OF BOTTOMHOLE FORMATION ZONE | 2005 |
|
RU2301248C1 |
