Studying of sedimentation influencing on cement stone properties

Authors: E.V. Kozhevnikov, N.I. Nikolaev (National Mineral Resources University (University of Mines), RF, Saint-Petersburg), O.A. Ozhgibesov, R.V. Dvoretskas (Perm National Research Polytechnic University, RF, Perm)

Key words: horizontal well cementing, cement slurry, sedimentation.

Oil and gas horizontal well drilling associated with the big amount of challenges that may occur while drilling or completion operations. The main risk while horizontal well cementing is sedimentation of cement slurry. Isolation of paid zones can be failed that caused by annular space flows. Results of cement slurry sedimentation studying are presented. Influence of cement sedimentation on cement stone properties is considered. It is determined that plugging back stone has heterogeneity of it properties, under upper wall of horizontal well cement stone has the worst strength and filtration properties.

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