Research of expanding ability of the cement slurries made on the basis of oil-well cement

Authors: S.E. Chernyshov, A.A. Melekhin, A.A. Kunitskikh, (Perm National Research Polytechnic University, RF, Perm), A.A. Shilkov, A.V. Mosin (Ontustik Munaigas JSC, Kazakhstan, Togus settlement)

Key words: oil well, cementing of casing, expanding cement slurry, technology of casing, quality of casing.

Application of cement slurries for cementing of casing of oil and gas wells without modifying additives on the basis of common oil-well cement often leads to emergence of cross-flow between beds right after cementation, as a result of their shrinkage. The authors developed expanding cement slurries on the basis of a common oil-well cement PCT-I-G with modifying additives. Researches of dynamics of increase in their linear expanding depending on type and quantity of expanding additives are conducted. Results of the trial tests of the developed expanding cement slurries are presented.