摘要：

双碳目标下，季冻区埋地输油管道安全与污染治理备受关注。土壤冻融循环改变土体孔隙与渗透性，加剧油品渗流复杂性。通过常温油-水-气多相数值仿真，结合冻土冰水相变相关试验数据开展温度-渗流效应外推修正，设置四类典型工况开展分析。结果显示：冻结期土体渗透率显著下降，基质渗流应急窗口较长，冻融裂隙优先流应急窗口期极短；融化期渗透率回升，油品扩散加快，易诱发二次污染。据此构建全流程低碳应急体系，可为季冻区管道泄漏预警与生态修复提供理论依据。

关键词：季节冻土；埋地输油管道；泄漏扩散；热质耦合传递；绿色低碳应急处置

中图分类号：TE832 文献标识码：A

Study on LeakageDiffusion Law and Emergency Disposal of Oil Pipeline in Seasonally Frozen Region Under the Background of Green and LowCarbon Development*

NIU Tian-jia, LIU Kun, WU Ming-yue, XU Zi-han

(College of Petroleum Engineering, Shandong Institute of Petroleum and Chemical Technology, Shandong Dongying 257000, China)

Abstract：Under the dualcarbon goal, the safety and pollution control of buried oil pipelines in seasonally frozen regions have attracted wide attention. Freezethaw cycles of soil alter soil pore structure and permeability, which aggravates the complexity of oil seepage. A temperatureseepage coupling model considering icewater phase change was established, and four typical working conditions were set for analysis. The results show that soil permeability decreases significantly during freezing period; the emergency response window for matrix seepage is relatively long, while that for preferential flow along freezethaw fractures is extremely short. During thawing period, permeability recovers and oil diffusion accelerates, which easily induces secondary pollution. Accordingly, a fullprocess lowcarbon emergency system is constructed, which can provide theoretical basis for leakage earlywarning and ecological restoration of oil pipelines in seasonally frozen regions.

Key words：seasonally frozen soil; buried oil pipeline; leakage and diffusion; heatmass coupled transfer; green lowcarbon emergency disposal