Expanding compositions of cement slurries for lost circulation control under cementing of casing of producing wells

Authors: A.A. Melekhin (Saint-Petersburg State Mining University, RF, Saint-Petersburg), S.E. Chernyshov, M.S. Turbakov (State National Research Polytechnic University of Perm)

For isolation quality increase of loss circulation zones during casing of oil wells, is offered plugging slurry based on Portland cement and expanding polymeric additive. This composition represents plugging system, which increases in volume up to 10-12 % during pumping into a formation. Meanwhile take place blinding of pore channels and decreasing of permeability of formation, ipso facto ensures leaktightness of whole interval.

Key words:producing well, extraction of oil trouble, lost circulation control, cementing of casing, cement slurry.

References

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