地下水封石洞油库对地下水的影响数值模拟分析

根据钻孔提水试验数据求出影响半径和渗透系数,按照地下水动力学方法求出了洞库涌水量,采用三维地下水数值模拟模型MODFLOW对山东某地地下水封石洞油库涌水对地下水位的下降影响规律和地下水漏斗进行了数值模拟和预测,分析石洞油库涌水对区域地下水的影响。分析结果表明:洞库涌水量较小,在施工3 a期间涌水主要来自岩石的弹性释水,对地下水位基本无影响;不考虑储油的情况下,模拟洞库运行50 a,地下水位在垂向随时间线性下降,平面上影响范围不大。

Numerical simulation analysis on influence of water-sealed underground oil storage in rock caverns on groundwater

The influence radius and the permeability coefficient of rock caverns are obtained according to drilling water lifting test.The cave water inflow is obtained according to groundwater dynamics.The influence of watersealed underground oil storage in rock caverns on the groundwater and groundwater funnel in Shandong province are simulated and predicted using MODFLOW.The influence of rock cavern water inflow on regional groundwater is analyzed.The results show that the cave water inflow is relatively smaller,originates from the elastically released water of rocks over a three-year period of construction,and has little influence on the groundwater level.Without consideration of the oil storage,the groundwater level was oberved to decline vertically at a rate that was linear with time over 50 years of simulation,with little horizontal influence.