Yudong Tian1,2, Gonghui Liu1, Yue Qi1,2,*, Jun Li1,3, Yan Xi1,4, Wei Lian1,3, Xiaojie Bai2, Penglin Liu1, Xiaoguang Geng2
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2837-2845, 2023, DOI:10.32604/fdmp.2023.028805
Abstract Organic rich dark shale of Q Formation can be found in many areas (e.g., in the North of S Basin). The shale
target stratum is easy to hydrate and often undergoes spallation. Therefore, centering the casing in the horizontal
section of the irregular borehole is relatively difficult. Similarly, achieving a good cement flushing efficiency under
complex borehole conditions is a complex task. Through technologies such as centralizer, efficient preflushing,
multi-stage flushing and ductile cement slurry, better performances can be achieved. In this study, it is shown
that the cementing rate in the DY2H horizontal section is 97.8%, which is more… More >
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