FIELD: oil and gas production.
SUBSTANCE: invention refers to compositions for preparing the process liquids and can be used in servicing of oil and gas extraction wells, particularly in oil recovery production steps (primary, secondary opening-out, bottoms up, quick-gain perforation and re-perforation, well killing etc.). In the method for preparing the process liquid of oil and gas wells involving water dissolution of calcium chloride and introduction of a corrosion inhibitor into the prepared solution that is ensured by introduction of the corrosion inhibitor and the scale inhibitor in crystalline 4-aquaous calcium nitrate with reducing the solution to density 1.15-1.55 t/m3 in the following ratio, wt %: calcium chloride 1.0-30.0; crystalline 4-aquaous calcium nitrate 69.8-98.8; the corrosion inhibitor 0.1-3.0; the scale inhibitor 0.1-1.0.
EFFECT: lower freezing temperature of the end solution and prevented salt loss with simultaneous improving collecting properties of a bottomhole formation zone.
4 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| HEAVY WELL-KILLING LIQUID WITHOUT SOLID PHASE WITH A DENSITY OF UP TO 1600 kg/m | 2021 |
|
RU2782915C1 |
| HEAVY WELL-KILLING LIQUID WITHOUT SOLID PHASE WITH A DENSITY OF UP TO 1450 kg/m3 | 2021 |
|
RU2778752C1 |
| COMPOSITION FOR PREPARATION OF PROCESS LIQUIDS OF OIL AND GAS WELLS | 2006 |
|
RU2329290C1 |
| BASE FOR KILL FLUIDS AND WELL COMPLETION | 2006 |
|
RU2347797C2 |
| WELL STOPPING METHOD | 2003 |
|
RU2250360C1 |
| METHOD FOR PRESERVING COLLECTING PROPERTIES OF FACE-ADJACENT AREA OF PRODUCTIVE BED OF OIL-EXTRACTIVE WELL | 2003 |
|
RU2245998C1 |
| WELL KILLING COMPOSITION | 2007 |
|
RU2350641C2 |
| DRY MIXTURE FOR KILLING OF OIL AND GAS WELLS AND TREATMENT OF BOTTOMHOLE ZONE | 2014 |
|
RU2582151C1 |
| PRODUCING LAYER FILTRATION PROPERTY MODIFIER | 2012 |
|
RU2506298C1 |
| STABILIZER FOR COLLECTOR PROPERTIES OF OIL FORMATION | 2006 |
|
RU2312880C1 |
