钻探工程2025，Vol.52Issue(5)：25-33,9.DOI:10.12143/j.ztgc.2025.05.004
固井水泥石温度与裂缝抑制用微胶囊实验研究
Development and study of microcapsules for suppression of temperature rise and crack generation in well cementing
摘要
Abstract
Deep-sea oil and gas wells often traverse natural gas hydrate formations.Due to the stable existence of natural gas hydrates under low temperature and high pressure conditions,the hydration heat of cement slurries can lead to the decomposition of hydrates around the wellbore,resulting in serious wellbore accidents.Moreover,hydration heat can induce thermal stress in the cement sheath,causing cracks and reducing the sealing capability of the cement sheath,ultimately leading to decreased cementing quality.In this study,low-carbon chain mixed alkanes were used as phase change materials and epoxy resin as the base material for crack suppression.A temperature-controlled self-healing microcapsule suitable for cement slurries in hydrate formations was prepared by the surface coating of calcium carbonate and stearic acid using a self-assembly method and a condensation method.The basic properties of the microcapsules were characterized using DSC,TG,optical microscopy,heat cycle tests,and fracture surface adhesion tests.The performance of the microcapsules in controlling temperature and suppressing cracks in cement slurry systems was investigated through rheological property tests,hydration heat rise tests,changes in the mechanical strength of cement stone,and crack development assessments.关键词
深海固井/水合物地层/水泥浆水化热/水合物稳定性/水泥石温度控制/水泥环裂缝抑制/微胶囊Key words
deepwater cementing/hydrate-bearing formation/hydration heat of cement slurry/hydrate stability/temperature control of cement stone/cement sheath crack inhibition/microcapsule分类
能源科技引用本文复制引用
王强,温达洋,赵琥,冯颖韬,田进,苏芷晗,杨国坤,郑少军,刘天乐..固井水泥石温度与裂缝抑制用微胶囊实验研究[J].钻探工程,2025,52(5):25-33,9.基金项目
国家重点研发计划课题"井下原位取样技术与装置"(编号:2024YFC2814304) （编号:2024YFC2814304）
国家自然科学基金项目"水合物分解对深水固井水泥环孔隙特征与力学性质的影响机制研究"(编号:42072343) （编号:42072343）
国家高层次人才特殊支持计划(编号:107-KZ23Z20016) （编号:107-KZ23Z20016）
