地下水封石油洞库渗流场的数值分析

对研究区水文地质条件和地下水封石油洞库、水幕系统进行了概化,利用Visual MODFLOW软件,建立了某地下水封石油洞库无水幕和有水幕条件下的三维地下水数值模拟模型,模拟了地下水封石油洞库区的渗流场。利用所建模型预报了2种条件下涌入地下水封石油洞库的涌水量、区域地下水降落漏斗扩展情况及洞库上方地下水位变化情况等。由预测结果可知,2种条件下洞库涌水量均逐渐减小并趋于稳定,而有水幕条件下的地下漏斗扩展范围和速度均比无水幕条件小;在洞库开挖初期水幕作用较小,随时间延长作用愈加明显,因此水幕系统在保证地下水封石油洞库的储油安全和保护周围地下水资源方面都起到重要作用。

Seepage Simulation of Underground Petroleum Storage Caverns and Necessity Analysis of a Water Curtain System

According to hydrogeologic conditions and the design data of certain underground petroleum storage caverns and their water curtain systems,3D-numerical simulation models with and one without water curtain are created respectively to simulate the groundwater flow of the caverns using Visual MODFLOW.The quantity of gushing groundwater and the pansion of groundwater depression cone as well as the groundwater level variation over the caverns are forecasted by running the models.By the results analysis,it shows that the quantity of gushing groundwater is decreasing and stabilizing gradually both on the two conditions,but the extending range and rate of the groundwater depression cone of the model with the water curtain is less than the one without.The water curtain plays a more and more important role on protection to the safety of oil storage and groundwater resource.