INNOVATIVE POWDER MIXTURES AND TECHNOLOGY FOR HIGH QUALITY CEMENTING OF CASING STRINGS IN PERMAFROST FORMATIONS AND LOW TEMPERATURE ENVIRONMENT

Samsonenko, Natalia V. – Cand.Tech.Sci., lecturer at the oil and gas drilling department of the Gubkin Russian State University of Oil and Gas, bur220@gubkin.ru bur220@gubkin.ru
Simonyants, Sergey L. – Dr.Tech.Sci., professor at the oil and gas drilling department of the Gubkin Russian State University of Oil and Gas, ssturbo@mail.ru ssturbo@mail.ru
Samsonenko Alexander V. – Cand.Tech.Sci., Director of LLC "Knitting-Service", speccem@rambler.ru speccem@rambler.ru

УДК 622.24

Key words: : permafrost rocks, cementing of casing strings, power cement slurry mixtures, foamed cement slurry, aerated buffer solution.

Circulation of positive temperature drilling fluids cause thawing and caving of unstable formations, lost circulation in unstable rocks and gas seepage in gas saturated horizons. The authors propose that the problem be solved by improved treatment of annular spaces prior to cement squeeze, decrease of hydrodynamic load on permeable formations and treatment with dispersed bine air bubbles which result from increased hydrodynamic activation of lightweight aerated erosion displacement fluid and cement slurry as well as from contact between high expansion lightweight aerated cement and normal density cement and all formations and casing pipes in the annular space.

INNOVATIVE POWDER MIXTURES AND TECHNOLOGY FOR HIGH QUALITY CEMENTING OF CASING STRINGS INPERMAFROST FORMATIONS AND LOW TEMPERATURE ENVIRONMENT

Samsonenko, Natalia V. – Cand.Tech.Sci., lecturer at the oil and gas drilling department of the Gubkin Russian State University of Oil and Gas, bur220@gubkin.ru
Simonyants, Sergey L. – Dr.Tech.Sci., professor at the oil and gas drilling department of the Gubkin Russian State University of Oil and Gas, ssturbo@mail.ru
Samsonenko, Alexander V. – Cand.Tech.Sci., director, LLC Vyazhushchee Servis, speccem@rambler.ru

Key words: permafrost rocks, cementing of casing strings, power cement slurry mixtures, foamed cement slurry, aerated buffer solution.

Circulation of positive temperature drilling fluids cause thawing and caving of unstable formations, lost circulation in unstable rocks and gas seepage in gas saturated horizons. The authors propose that the problem be solved by improved treatment of annular spaces prior to cement squeeze, decrease of hydrodynamic load on permeable formations and treatment with dispersed bine air bubbles which result from increased hydrodynamic activation of lightweight aerated erosion displacement fluid and cement slurry as well as from contact between high expansion lightweight aerated cement and normal density cement and all formations and casing pipes in the annular space.