FIELD: oil and gas production.
SUBSTANCE: invention relates to construction of oil and gas wells and can be used for cementation of casing strings under abnormally low formation pressure conditions. Aerated grouting mortar contains, mass parts: Portland cement 100, foaming agent (Gasblok-M) 0.5-1.0, reagent NMN-200 0.1-0.5, calcium chloride 2.0, air or neutral gas 0.01-0.1, and water 48-50. Mortar is characterized by lowered viscosity, increased adhesion of grouting stone to casing string and rock, improved heat-insulation properties and ensured curing of grouting mortar under permafrost conditions to form sealed annular space excluding interstratal cross-flows and manifestations during operation period of well.
EFFECT: improved performance characteristics of mortar.
1 tbl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| CEMENTING METHOD FOR WELL WITH ABNORMALLY LOW RESERVOIR PRESSURE | 2006 |
|
RU2320848C1 |
| FOAM-CEMENTING PLUGGING MATERIAL FOR BOREHOLES FIXATION | 2016 |
|
RU2623759C1 |
| FOAM CEMENT BACKFILL MATERIAL | 2017 |
|
RU2654112C1 |
| METHOD OF ELIMINATING LEAKAGE OF CASED COLUMN | 2007 |
|
RU2366801C2 |
| BACKFILL FOR CEMENTING WELLS WITH HIGH GAS RATIO | 2011 |
|
RU2447123C1 |
| COMPOSITION FOR PRODUCING AERATED GROUTING MORTAR | 0 |
|
SU1745893A1 |
| AERATED PLUGGING COMPOSITION | 0 |
|
SU1416668A1 |
| WELLS HIGH INTENSITY ABSORPTION INTERVALS INSULATION METHOD AND AERATED SLURRY FOR ITS EXECUTION | 2008 |
|
RU2379474C2 |
| AERATED CEMENT MORTAR COMPOSITION | 1999 |
|
RU2169828C1 |
| LIGHT-WEIGHT GROUTING COMPOSITION FOR WELL CEMENTING IN HIGH-PERMEABILITY ROCKS UNDER CONDITIONS OF HYDROGEN SULPHIDE AGGRESSION | 2016 |
|
RU2741890C2 |
