单一规模化深部卤水开采效率和越流风险评估  

Estimation on Production Efficiency and Leakage Risk of Pure Large-Scale Exploitation of Deep Brine

作　　者：房琦[1] 李义连[2] 吕俊文[1] 程鹏 

机构地区：[1]南华大学环境保护与安全工程学院,湖南衡阳421001 [2]中国地质大学(武汉)环境学院,湖北武汉430074 [3]湖南省有色地质勘察局217队,湖南衡阳421001

出　　处：《安全与环境工程》2016年第3期113-118,共6页Safety and Environmental Engineering

基　　金：国土资源部公益性行业基金项目(201211063);南华大学引进博士科研启动基金项目(2014XQD12)

摘　　要：以江陵凹陷深部高矿化度富钾卤水层为例,通过建立多级砂泥岩互层模型,采用数值模拟的方法评估了不同泥岩隔层渗透条件下单一规模化的卤水开采效率、越流风险和区域压强的变化。结果表明:卤水开采效率受到泥岩隔层渗透性的显著影响,对于单一规模化的卤水开采,单井卤水日产量随着开采时间的延续降低迅速,难以保持卤水的高效开采;各水文地质单元之间发生强烈的越流补给,其越流补给量取决于泥岩隔层渗透性的强弱;无论泥岩隔层渗透性的强弱如何,单一规模化的卤水开采都会使得含水层的区域压强发生大幅度降低,容易诱发地面沉降,引发一系列环境地质问题。By taking potassium-rich brine production in Jiangling depressin for instance,this paper builds up a 3Dmultiple aquifer system model composed of three groups of interbeded sandstone and mudstone layers and carries out numerical simulations to estimate efficiency of pure large-scale brine production and leakage risk as well as regional pressure change under different permeability conditions of mudstone interlayer.The results show that brine production efficiency is significantly influenced by the permeability of mudstone interlayer.As for the large-scale brine exploitation,it is difficult to maintain the effective brine production because the brine production of single well drops rapidly with time.Strong leakage recharge occurs between each hydrogeological unit because of large-scale brine production,and the amount of recharge strongly depends on the permeability of mudstone interlayer.Regardless of the strength of the permeability of mudstone interlayer,significant reduction in regional pressure occurs during the large-scale brine production,which tends to induce land subsidence and causes a series of environmental and geological problems.

关 键 词：深部卤水 开采效率 越流风险 压强变化 单一规模化开采 

分 类 号：X936[环境科学与工程—安全科学] TD74[矿业工程—矿井通风与安全]