雄安新区埋地原油管道泄漏扩散模拟计算分析

Simulation and calculation analysis of leakage and diffusion of buried crudeoil pipelines in Xiong′an New Area

随着雄安新区的设立、环保法的发布以及国家新标准的发表,对环保监测及治理要求日趋严格。借助Fluent软件,以雄安新区的地质条件以及X油田的油品性质为基础参数,对原油管道的泄漏情况进行计算分析。分析结果表明,已泄漏的油品在土壤中扩散速度呈现出一定的规律,油品的泄漏体积随着泄漏速度的减小而减小,且泄漏时间越长,被污染的土壤体积的增率越小;当泄漏时间足够长,泄漏到达一定范围会产生边界回流,随后压力场接近稳定,泄漏状态也逐渐趋于稳定,油品不再向土壤中扩散。以上原油在土壤的扩散特性规律,为制定土壤和地下水的修复方案提供了参考。

With the establishment of Xiong′an New Area,the release of environmental protection law and the release of new national standards,the requirements for environmental protection monitoring and governance are becoming increasingly stringent.With the help of Fluent software,this paper calculated and analyzed the leakage of crude oil pipeline based on the geological conditions of Xiong′an New Area and the oil properties of X Oilfield.After analysis,it is concluded that the diffusion rate of leaked oil in the soil presents a certain rule,and the leakage volume of oil decreases with the decrease of the leakage rate,and the longer the leakage time,the smaller the increase rate of contaminated soil volume.When the leakage time is long enough,when the leakage reaches a certain range,boundary backflow will occur,and then the pressure field will be nearly stable,and the leakage state will gradually become stable,and the oil will no longer diffuse into the soil.The above diffusion characteristics of crude oil in soil provide a reference for the development of remediation plans for soil and groundwater.