Completion and cementing techniques in horizontal wells of Huabei Oilfield

Horizontal well techniques are important for conservation development, security development, and clean development, which enable the number of drilling to increase rapidly. Through the analysis of cementing diffickuties of the horizontal wells in Huabei Oilfield, a set of techniques applicable to horizontal well cementing in the oilfield are summarized, i.e. the techniques to ensure casing quality, improve hole cleaning, improve casing centralization, reduce the static time of drilling fluid, optimize displacement fluid, optimize the slurry system, turbulence displacement and casing floating. Good results have been obtained from the field application of the techniques. By the end of 2008, cementing of 70 horizontal wells has been completed, and the quality rate reached 78.57%. Systematic horizontal well cementing techniques are developed, which may be good reference for horizontal well cementing in the future.