FIELD: oil and gas industry, particularly process liquids adapted to kill oil, gas and gas-condensate wells when formation pressure is lower than hydrostatic one during well operation and repair.
SUBSTANCE: well killing liquid has hydrocarbon base, synthetic fatty acid, sodium hydroxide, waterproofing silicone fluid agent used as additional stabilizer and silica-alumina microspheres taken as barrier lightweight filler. All above components are taken in the following amounts (% by weight): hydrocarbon base - 68-88, synthetic fatty acid - 1.2-2.1, sodium hydroxide - 0.2-0.36, waterproofing silicone fluid agent - 0.32 and barrier lightweight filler - remainder.
EFFECT: possibility to create hydrocarbon-based liquid exerting negligible influence on porosity and permeability of well reservoir zone, possibility of above liquid usage for killing wells characterized with low reservoir energy.
1 ex, 2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| LIQUID FOR OIL AND GAS WELL KILLING | 2004 |
|
RU2258802C1 |
| COMPOSITION FOR KILLING OIL, GAS AND GAS CONDENSATE WELLS | 2007 |
|
RU2352603C1 |
| EMULSION COMPOSITION FOR KILLING GAS, GAS CONDENSATE, AND OIL WELLS | 2002 |
|
RU2213762C1 |
| LIGHT-WEIGHT INVERT DISPERSION | 2000 |
|
RU2176261C1 |
| FLUID FOR KILLING OIL, GAS, AND GAS CONDENSATE WELLS | 2001 |
|
RU2187529C1 |
| WELL KILLING FLUID | 2001 |
|
RU2203304C2 |
| LIGHTENED INVERT DISPERSION FOR BORING, KILLING, AND REPAIRING WELLS | 2006 |
|
RU2319539C1 |
| SOLUTION FOR COMPLETION AND KILLING OF LOW-TEMPERATURE OIL AND GAS WELLS | 1999 |
|
RU2167275C2 |
| HYDROCARBON-BASED DRILLING FLUID | 2001 |
|
RU2208035C1 |
| COMPOSITION FOR REPAIR AND WATERPROOFING OPERATIONS IN WELLS | 2002 |
|
RU2211306C1 |
