Development of backfill compositions for well cementing in complicated geological conditions

Authors: A.A. Melekhin, A.V. Storchak (Saint-Petersburg State Mining University, Saint-Petersburg, Russian Federation)

For increase quality of isolation of absorbent intervals during well casing authors propose to use the backfill based on Portland cement with the expanding polymer additive. Designed composition is backfill system, which increases in volume up to 10-12 % during pumping into an absorbent layer, thus forming the cement stone, which secures leaktightness of whole interval.

Key words: well, absorption, casing, backfill composition

For increase quality of isolation of absorbent intervals during well casing authors propose to use the backfill based on Portland cement with the expanding polymer additive. Designed composition is backfill system, which increases in volume up to 10-12 % during pumping into an absorbent layer, thus forming the cement stone, which secures leaktightness of whole interval.

Key words: well, absorption, casing, backfill composition


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