FIELD: drilling of oil and gas wells.
SUBSTANCE: invention relates to backfill solutions intended for well cementing under conditions of intensive (complete) absorption and hydrogen sulphide aggression. Cement mortar for cementing wells in conditions of intense absorption and hydrosulphuric aggression contains backfill sulphate-resistant cement—oil-well portland cement I-G CC-1, expansion additive—DR-100, microcalibrated granulated foam glass—MCGFG and water, characterized by that the composition additionally contains a gas block for reducing filtration, water and gas permeability, which is Gasblok, with following ratio of ingredients, % of cement weight: oil-well portland cement GCC-1—100.0; expansion additive (EX-100)—1.0; micro-calibrated granulated foam glass—6.0; gas block—0.5; water-cement ratio is equal to 0.52.
EFFECT: disclosed is a light-weight plugging compound for cementing wells in highly permeable rocks in conditions of hydrogen sulphide aggression.
1 cl, 2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| GROUTING COMPOSITION | 2001 |
|
RU2202033C2 |
| GROUTING MORTAR | 0 |
|
SU1682531A1 |
| EXPANDING OIL-WELL CEMENT | 1991 |
|
RU2013523C1 |
| DRY MIXTURE FOR PREPARING EXPANDING GROUTING MORTAR | 2019 |
|
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| HYDROGEN SULPHIDE RESISTANT SEALING INHIBITED GROUTING MORTAR | 2015 |
|
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| HYDROGEN SULPHIDE RESISTANT GROUTING MORTAR | 2011 |
|
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| METHOD TO FIX PROCESS WELLS OF UNDERGROUND STORAGES OF GASEOUS AND LIQUID HYDROCARBONS (VERSIONS) | 2015 |
|
RU2576416C1 |
| LIGHT-WEIGHT GASPROOF PLUGGING MATERIAL FOR CEMENTING OVER-PRODUCING INTERVALS (VERSIONS) | 2012 |
|
RU2497861C1 |
| PLUGGING MATERIAL | 2019 |
|
RU2717317C1 |
| MATERIAL FOR CEMENTING WELLS | 0 |
|
SU1303735A1 |
