裂隙岩体渗透各向异性对地下储油洞库水封性的影响规律  

Influence of Permeability Anisotropy in Fractured Rock Masses on Water Seal Property of Underground Oil Storage Cavern

作　　者：施雪松 张一驰 林鹏[1] 吴杰 熊悦 刘彤晖 SHI Xue-song;ZHANG Yi-chi;LIN Peng;WU Jie;XIONG Yue;LIU Tong-hui(Geotechnical and Structural Engineering Research Center,Shandong University,Jinan 250061,China)

机构地区：[1]山东大学岩土与结构工程研究中心,济南250061

出　　处：《科学技术与工程》2020年第18期7262-7270,共9页Science Technology and Engineering

基　　金：国家自然科学基金(51879153);山东省自然科学基金(ZR201808080053)。

摘　　要：为研究岩体渗透各向异性对地下储油洞库的水封性影响规律,建立油库单一洞室的二维等效连续介质模型,用不同渗透张量表征岩体渗透各向异性的不同情况,并开展数值模拟。从洞室周围水压力、渗流场和涌水量等角度对模拟结果进行分析,并评价了洞室水封性。结果表明:岩体各向渗透性较均匀时,储油洞室水封性要求相对一致,有利于水幕系统的统一设计和施工处理,容易通过设置的水幕系统保证洞室整体的水封密闭;岩体最强渗透方向在45°~90°之间时,有利于水幕系统的水压力向下传递,形成高水力梯度区包围洞室,保证洞室密封。To study the influence of rock mass permeability anisotropy on the water seal property of underground oil storage cavern, a two-dimensional equivalent continuous medium model of a single cavern was established. Different permeability tensors were used to represent different permeability anisotropy of rock mass, and numerical simulation was carried out. The simulation results were analyzed from the perspectives of water pressure, seepage field, and water inflow around the cavern, and the water seal property of the cavern was evaluated. The results show that when the rock mass has relatively uniform permeability, the water sealing requirements of the oil storage cavern are relatively consistent, which is conducive to the unified design and construction treatment of water curtain system, and it is easy to ensure the overall water seal of the cavern through the installed water curtain system. When the strongest penetration direction of the rock mass is between 45° and 90°, it is beneficial for the water pressure of the water curtain system to transfer downward, forming a high hydraulic gradient area surrounding the cavern and ensuring the water seal of the cavern.

关 键 词：地下储油洞库 水封性 渗透张量 各向异性 数值模拟 

分 类 号：TE822[石油与天然气工程—油气储运工程]