中文摘要：

为研究气田建设项目对地下水产生的石油类污染,以西北某气田开发区地下水为研究对象,在水文地质条件调查和地下水污染源与污染途径分析的基础上,采用GMS软件建立研究区地下水流模型和溶质运移模型,模拟预测了凝析油储罐破裂泄漏情景下石油类污染物在地下水中的迁移规律及自然净化过程。结果表明：模拟期内地下水中的石油类浓度小于标准值,地下水未超标但受到轻微污染;污染晕中心浓度随时间减小,污染场地及下游位置污染物浓度先增大后减小,距离污染源越远的位置峰值浓度越小。

英文摘要：

To study petroleum pollution in groundwater caused by gas field construction projects, the paper took the groundwater of a gas field development zone in northwest China as the research object,established groundwater flow model and the solute transport model in the study area using GMS software,and predicted migration patterns and natural purification process of petroleum pollutants in groundwater in the situation that gas condensate tanks ruptured and leaked,based on hydrogeological conditions of the study area identified through field investigations and the analysis on source and ways of groundwater pollution in the gas field. The results showed that petroleum concentration in the groundwater during simulation period was less than the standard value,and the groundwater was slightly polluted but not exceed the standard; The concentration of pollution halo center decreased over time during forecast period while pollutants concentration of the contaminated site and the downstream position firstly increased and then decreased,and the further the distance from the pollution source was,the smaller the peak concentration was.