宁夏南部及邻区地震观测井地下水埋藏类型综合评价  

Comprehensive Evaluation of Groundwater Types of Seismic Observational Wells in South Ningxia and Its Adjacent Areas

作　　者：丁风和 贺嘉伟 栾博文 杨学峰 储翔 DING Fenghe;HE Jiawei;LUAN Bowen;YANG Xuefeng;CHU Xiang(Earthquake Agency of Ningxia Hui Autonomous Region,Yinchuan 750001,Ningxia,China)

机构地区：[1]宁夏回族自治区地震局,宁夏银川750001

出　　处：《地震研究》2022年第4期599-607,共9页Journal of Seismological Research

基　　金：地震科技星火计划项目(XH19048);宁夏自然科学基金项目(2020AAC03438);地下流体监测与应用研究创新团队(CX2019-2)联合资助。

摘　　要：利用宁夏南部及邻区6口地震观测井的数字化水位和气压等资料,基于井水位对气压的阶跃响应函数、频谱分析法、潮汐波群相位超前或滞后法诊断和判别了各井井-含水层的地下水埋藏类型,并结合各井点近几年水化学离子样品测量结果,分析了各井的水—岩平衡状态,综合评价和讨论了各井-含水层系统的地下水埋藏类型。结果表明:6口井承压性由强到弱的顺序分别为平凉铁路井、静宁威戎井、固原东山坡井、西吉王民井、海原甘盐池井和平凉柳湖井,但受控于区域地形地貌、构造特征、井孔结构以及裂隙发育程度等,6口井不同程度与外界有着一定的水力联系。依据成井时的贮存埋藏条件定性判别的地下水埋藏类型与多方法综合判定的这些井的地下水埋藏类型不一致的原因为各井含水层的水力特性、裂隙发育程度、井孔结构和固体潮汐波频率存在差异。Using digital data of water level and air pressure in six seismic observational wells including Ganyanchi well in Haiyuan,Wangmin well in Xiji,Dongshanpo well in Guyuan,Liuhu well and Tielu well in Pingliang and Weirong well in Jingning in South Ningxia and its adjacent areas,and based on the spectrum analysis method,the step response function method of well water level to air pressure,and the phase advance or lag method of tidal wave group,we determined the groundwater type of the aquifer in each well.And using the measurements of hydrochemical ion samples of each well in recent years,we analyzed the state of water-rock equilibrium in the wells,and comprehensively discussed the groundwater type of the aquifer of each well.The results show that the bearing strength of the six wells from the strongest to the weakest is Tielu well,Weirong well,Dongshanpo well,Wangmin well,Ganyanchi well and Liuhu well.Controlled by regional landform,structural characteristics,wellhole structure and fracture development,the six wells to some degree have hydraulic connections with the external environment.Finally,we analyzed the inconsistency between groundwater types of these wells judged according to the storage conditions at the time of well completion and the groundwater types of these wells judged according to the method proposed in this paper.The hydraulic property,degree of fracture development,the well-hole structure,and the tidal wave caused the inconsistency.

关 键 词：井水位 井-含水层系统 地下水埋藏类型 宁夏南部及邻区 

分 类 号：P315.723[天文地球—地震学]