Petroleum Science >2024,??Issue2:??- DOI: https://doi.org/10.1016/j.petsci.2023.10.018.
Research on casing deformation prevention technology based on cementing slurry system optimization Open?Access
文章信息
作者：Yan Yan, Meng Cai, Wen-Hai Ma, Xiao-Chuan Zhang, Li-Hong Han, Yong-Hong Liu
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引用方式：Yan Yan, Meng Cai, Wen-Hai Ma, Xiao-Chuan Zhang, Li-Hong Han, Yong-Hong Liu, Research on casing deformation prevention technology based on cementing slurry system optimization, Petroleum Science, Volume 21, Issue 2, 2024, Pages 1231-1240, https://doi.org/10.1016/j.petsci.2023.10.018.
文章摘要
Abstract: The casing deformation prevention technology based on the optimization of cement slurry is proposed to reduce the casing deformation of shale oil and gas wells during hydraulic fracturing. In this paper, the fracture mechanism of hollow particles in cement sheath was firstly analyzed by discrete element method, and the effect of hollow particles in cement on casing deformation was investigated by laboratory experiment method. Finally, field test was carried out to verify the improvement effect of the casing deformation based on cement slurry modification. The results show that the formation displacement can be absorbed effectively by hollow particles inside the cement transferring the excessive deformation away from casing. The particles in the uncemented state provide deformation space during formation slipping. The casing with diameter of 139.7?mm could be passed through by bridge plug with the diameter of 99?mm when the mass ratio of particle/cement reaches 1:4. According to the field test feedback, the method based on optimization of cement slurry can effectively reduce the risk of casing deformation, and the recommended range of hollow microbeads content in the cement slurry is between 15% and 25%.
關鍵詞
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Keywords: Cement slurry; Hollow ceramsite; Casing deformation; Formation slip; Field test