FIELD: oil and gas industry.
SUBSTANCE: in a method of cleaning bottomhole zone (BHZ) from clay formations a loose part of clay formations is removed by washing BHZ with process water, after which a clarifying water-based reagent comprising sodium bisulfate in the amount of 15-17 wt % and hydroquinone in the amount of 2-4 wt % is injected into BHZ and held until destruction of the dense part of the clay formations, then washing from the reaction products is carried out and acid aqueous solution comprising oxyethylidenediphosphonic acid in the amount of 17-19 wt % is injected, then the specified acid aqueous solution is held during the time necessary for dissolution of residual clay formations, and well development is carried out.
EFFECT: increased efficiency of bottomhole zone cleaning due to maximum build-up of productive formation permeability.
3 ex,1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF CLEANING BOTTOMHOLE FORMATION ZONE FROM CLAY FORMATIONS | 2018 |
|
RU2679936C1 |
| METHOD FOR PROCESSING OF FORMATION FACE ZONE | 2003 |
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| METHOD OF TREATING TERRIGENOUS AND CLAY OIL RESERVOIRS | 1999 |
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| METHOD OF FASTENING BOTTOM-HOLE ZONE OF RESERVOIR | 2019 |
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| METHOD FOR REMOVING SILT DEPOSITS FROM HYDROCARBON-CARRYING STRATA | 1994 |
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| TREATMENT METHOD OF BOTTOMHOLE FORMATION ZONE WITH TERRIGENOUS TYPE OF RESERVOIR | 2019 |
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| METHOD FOR COLMATAGE REMOVAL FROM BOTTOMHOLE FORMATION ZONE UPON FIRST OPENING TO RESTORE PERMEABILITY AND POROSITY OF HEADER | 2013 |
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| METHOD OF CHEMICAL TREATMENT OF FORMATION WELL ZONE FOR INTENSIFICATION OF HYDROCARBONS INFLOW | 2001 |
|
RU2209957C1 |
