FIELD: oil and gas industry.
SUBSTANCE: invention can be used under conditions of abnormal high formation pressure and high temperatures for primary and secondary drilling-in, for well killing and for various operations, including in multi-pay wells, having different formation pressure and permeability. Composition for preparation of heavy process liquid for completion and repair of oil&gas wells consists of, wt %: calcium chloride 25.7-40.8; calcium nitrate 12.9-24.4; zinc chloride 38.1-60.0; zinc oxide 0.3-0.7; sodium thiosulfate 0.1-0.7.
EFFECT: consistency of solution with formation water, no sediment when solutions are diluted with water, prevention of formation pores from irreversible clogging with solid particles, low crystallisation and corrosion of solutions, reduced energy consumption due to faster dissolution of the composition because of temperature increase for dissolution of metal chlorides.
1 tbl, 7 ex
| Title | Year | Author | Number |
|---|---|---|---|
| COMPOSITION FOR PREPARING SOLID PHASE-FREE PROCESS FLUIDS (DENSITY UP TO 1600 kg/m) DESIGNED FOR COMPLETING AND REPAIRING OIL AND GAS WELLS | 2005 |
|
RU2291181C1 |
| COMPOSITION FOR PREPARING PROCESS LIQUID FOR COMPLETION AND REPAIR OF OIL AND GAS WELLS | 2007 |
|
RU2363717C1 |
| COMPOSITION FOR PREPARATION OF HEAVY PROCESS FLUID FOR WELL KILLING | 2019 |
|
RU2737597C1 |
| BASE FOR CALCIUM-FREE WELL-KILLING FLUID | 2011 |
|
RU2470060C1 |
| COMPOSITION FOR PREPARING HEAVY PROCESS LIQUIDS FOR FINISHING AND REPAIRING OIL AND GAS WELLS | 2009 |
|
RU2406745C1 |
| COMPOSITION FOR PREPARATION OF PROCESS LIQUIDS WITHOUT SOLID PHASE OF DENSITY TO 1,60 g/m | 2010 |
|
RU2427604C1 |
| COMPOSITION FOR PREPARING HIGH-DENSITY NON-SOLID PHASE PROCESS LIQUIDS | 2010 |
|
RU2423405C1 |
| COMPOSITION FOR PREPARATION OF TECHNOLOGICAL LIQUID FOR COMPLETION AND REPARING OF OIL AND GAS WELLS | 2008 |
|
RU2365612C1 |
| HEAVY PROCESS FLUID BASED ON CHLORIDES, COMPOSITION AND METHOD FOR ITS PREPARATION, METHOD FOR KILLING WELLS WITH HEAVY PROCESS FLUID | 2022 |
|
RU2802773C1 |
| HEAVY PROCESS FLUID, COMPOSITION AND METHOD FOR ITS PREPARATION, METHOD OF WELL KILLING WITH HEAVY PROCESS FLUID | 2023 |
|
RU2817459C1 |
