FIELD: oil and gas production.
SUBSTANCE: invention relates to oil production technology involving use of hydrochloric acid-based chemicals via complex hydrochloric acid effect on well bottom zone to intensify oil production and may be specifically used to increase oil recovery of viscous oil-saturated low-permeable carbonate reservoirs. Composition contains 22-28% of 20 vol % aqueous HCl solution, 7-8% of 98% aqueous acetic acid solution, and 65-70% of solvent based on light pyrolysis tar obtained as secondary product from petroleum processing enterprises.
EFFECT: increased well bottom zone treatment efficiency due to improved quality of treatment composition, in particular stability and dipping depth into formation.
4 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| COMPOSITION FOR TREATMENT OF BOTTOMHOLE CARBONATE FORMATION ZONE | 2003 |
|
RU2254463C1 |
| ACID SURFACE-ACTIVE COMPOSITION FOR TREATING BOTTOM-HOLE ZONE OF OIL AND GAS WELLS | 2015 |
|
RU2643050C2 |
| COMPOSITION FOR COMPLEX TREATMENT OF WELL BOTTOM ZONE | 2008 |
|
RU2378314C1 |
| ACIDISING COMPOSITION FOR BOTTOMHOLE FORMATION ZONE | 2013 |
|
RU2523276C1 |
| ACID EMULSION FOR OIL RESERVOIR BOTTOMHOLE ZONE PROCESSING | 2016 |
|
RU2625129C1 |
| METHOD OF PROCESSING FORMATION BOTTOMHOLE ZONE | 2007 |
|
RU2352773C1 |
| METHOD FOR PROCESSING BOTTOMHOLE FORMATION ZONE | 2014 |
|
RU2583104C1 |
| METHOD FOR EFFECTING FACE-ADJACENT WELL AREA | 2004 |
|
RU2252311C1 |
| COMPOSITION FOR TREATING HOLE-BOTTOM AREA OF WELL | 0 |
|
SU1170127A1 |
| SURFACE-ACTIVE ACID COMPOSITION FOR TREATMENT OF CARBONATE BASINS | 2012 |
|
RU2494136C1 |
