FIELD: oil and gas industry.
SUBSTANCE: method of acid treatment of bottom-hole zone of carbonate reservoir includes injection of the acid composition containing in wt %: inorganic or organic acid, or their mixture 9.0-24.0; zwitterion surface-active substance - oleinamidopropylbetaine 1.0-10.0; hydrophobically-modified polyurethane polymer 0.05-3.0; water - rest, at that the acid composition is injected by single stage or by portions with holding between injections. The acid composition can additionally contain anionic surface-active substance in amount of 0.1-3.0 wt %. The above specified acid composition is injected alternating with injection of hydrochloric acid at 12-24% concentration.
EFFECT: alignment of profile of inflow of the production wells in carbonate reservoirs with non-uniform permeability, creation of new fluid conducting channels through entire perforated thickness of the reservoir, restoration of reservoir characteristics of bottom-hole zone due to its cleaning of mud solid particles.
3 cl, 1 tbl, 16 ex, 4 dwg
Title | Year | Author | Number |
---|---|---|---|
ACID COMPOSITION FOR TREATMENT OF BOTTOM-HOLE ZONE OF CARBONATE RESERVOIR | 2014 |
|
RU2554651C1 |
ACID COMPOSITION FOR TREATMENT OF THE BOTTOMHOLE ZONE OF A HIGH-TEMPERATURE CARBONATE RESERVOIR | 2021 |
|
RU2770192C1 |
METHOD OF SELECTIVE TREATMENT OF PRODUCTIVE CARBONATE FORMATION | 2015 |
|
RU2610967C1 |
COMPOSITION FOR INCREASING EFFICIENCY OF HYDROCHLORIC ACID TREATMENT IN CARBONATE RESERVOIRS | 2023 |
|
RU2829133C2 |
COMPOSITION FOR INTENSIFICATION OF HYDROCARBON FLUID INFLUX FROM PORE-CRACKED CARBONATE RESERVOIR | 2017 |
|
RU2669600C1 |
METHOD FOR INCREASING OIL RECOVERY OF RESERVOIRS BY EXPOSURE TO AN ALKALINE SOLUTION OF A SURFACTANT | 2021 |
|
RU2778920C1 |
METHOD FOR SELECTIVE ACID TREATMENT OF NON-UNIFORM CARBONATE FORMATION | 2018 |
|
RU2704668C1 |
COMPOSITION FOR INCREASING OIL EXTRACTION FROM ZWITTERIONIC-BASED SURFACTANTS | 2019 |
|
RU2716070C1 |
METHOD FOR INTERVAL ACIDISING OF HORIZONTAL WELL USING CARBONATE RESERVOIR | 2014 |
|
RU2554962C1 |
WATERPROOFING FORMULATION FOR TREATING BOTTOMHOLE FORMATION ZONE | 2006 |
|
RU2317312C1 |
Authors
Dates
2015-07-10—Published
2014-05-05—Filed