非均质土壤多孔介质中泄漏原油扩散特性分析  

Analysis of Diffusion Characteristics of Buried Pipeline Leaking Crude Oil in Heterogeneous Porous Media

作　　者：田志强 廖晓玲 门海东 金斌戈 郭曦 TIAN Zhiqiang;LIAO Xiaoling;MEN Haidong;JIN Bin'ge;GUO Xi

机构地区：[1]上海和中合检测技术有限公司,上海市201611 [2]杭州市特种设备检验科学研究院 [3]东北石油大学土木建筑工程学院

出　　处：《化工装备技术》2024年第5期16-20,共5页Chemical Equipment Technology

基　　金：国家重点研发计划项目(2023YFF0611600);国家市场监管总局科技计划项目(2023MK163);杭州市科技发展计划项目(20201203B159)。

摘　　要：探究埋地管道泄漏原油在非均质多孔介质中扩散特性,对准确预测埋地管道原油泄漏位置、应急修复处理以及降低输油管道泄漏事故危害性有着重要意义。建立埋地输油管道在非均质多孔介质中的泄漏模型,基于计算流体力学方法针对特定变量条件下多孔介质多相渗流开展数值模拟;研究不同回填土孔隙率、泄漏速度对原油扩散特性的影响及原油扩散后非均质多孔介质温度场的变化规律。研究结果表明:无论回填土孔隙率如何,原油泄漏过程均包含加速阶段、过渡阶段、稳定阶段;当泄漏原油体积流量一定时,回填土孔隙率越小、泄漏速率越大,扩散速率越快,其在空气中的扩散效率就越高,反之亦然;泄漏后土壤多孔介质温度场对回填土孔隙率变化并不敏感,泄漏速率是主导温度场变化的主要因素。Exploring the diffusion characteristics of crude oil leaked from buried pipelines in heterogeneous porous media is of great significance for accurately predicting the location of crude oil leakage in buried pipelines,emergency repair and treatment,and reducing the harm of oil pipeline leakage accidents.A leakage model for buried oil pipelines in heterogeneous porous media was established,and numerical simulations of multiphase flow in porous media under specific variable conditions were carried out based on computational fluid dynamics methods.The influence of different backfill soil porosity and leakage rate on the diffusion characteristics of crude oil,as well as the variation law of temperature field in heterogeneous porous media after crude oil diffusion were studied.The research results indicated that regardless of the porosity of backfill soil,the process of crude oil leakage included acceleration stage,transition stage,and stable stage.When the volume flow rate of leaked crude oil was constant,the smaller the porosity of backfill soil,the faster the leakage rate,and the faster the diffusion rate,the higher its diffusion efficiency in the air,and vice versa.The temperature field of porous soil media after leakage was not sensitive to changes in the porosity of backfill soil,and the leakage rate was the main factor that dominates the temperature field changes.

关 键 词：埋地管道 原油泄漏 多孔介质 回填土 孔隙率 

分 类 号：TE832[石油与天然气工程—油气储运工程]