第25卷第2期 2011年4月
现代地质 GEOSCIENCF
关津地区深层地下热水井水动力特征
赵敬波，周训，方斌，刘东林（中国地质大学水资源与环境学院，北京100083）
Vol.25No.2 Apr.2011
摘要：天津地区部分深层地下热水钻井在开采过程中井口水温明显高于开采前的井口水温，井内水的密度随之降低，可导致动水位高于开采前的静水位。采取井底压力的折算公式和室内实验的方式分别对实测数据和该现象进行分析、模拟。结果表明，开采条件下的井底压力明显小于停采条件下的井底压力，水位拟合主要受地热井的密度、井底压力的计算公式和计算方法、地质结构以及地热井回灌等因索的影响；在实验第一阶段观测到井底温度与井口水位呈正线性相关，并底压力与水柱的平均密度呈线性负相关：在第三阶段平均密度和井底压力也呈线性负相关；而在第二阶段
并底压力几乎保持不变时，可以根据该压力对不同井口温度时动水位升高值进行预测。关键词：动水位；井底压力；水位拟合；地下热水；天津
中图分类号：P332.6；P641
文献标志码：A
文章编号：10008527(2011)02=036307
DynamicFeaturesinDeepGeothermalWellsinTianjinArea
ZHAO Jing-bo, ZHOU Xun, FANG Bin, LIU Dong-lin
(School of Water Resources and Emvironment, China Uniersity of Gesciences,Bejing100083, China)
Abstract : The wellhead temperature of part of deep geothermal wells in Tianjin in the pumping process is high-er than the water temperature before pumping and the density of thermal water decreases, which result in the dy-namic water level higher than the static water level prior to pumping. In this paper, the conversion formula of well bottom pressure is adopted to analyze the measured data and a laboratory test is established to simulate the regular patterm of water level of a thermal well. The dynamic water level and static water level can approximately be calculated according to the average well bottom pressure during pumping and the stopping pumping conditions last year. The results show that in pumping condition the well bottom pressure is smaller than that prior to pum-ping and the water level is mainly affected by the number of geothermal wells, the calculating formula of the well bottom pressure, geological structure, geothermal injection and other factors. In the first stage the experiment shows that in the well bottom water temperature and wellhead temperature change linearly. Well bottom pressure and the average density are negatively correlated. In the third stage well bottom pressure and the average density are also negatively correlated. In the second stage bottom hole temperature changes very little, the bottom hole pressure remains almost unchanged. Therefore, according to the pressure the dynamic water level of different wellhead temperature can be predicted.
Key words: dynamic water level; well bottom pressure; fitting of water level; themal groundwater; Tianjin
近几十年来随着开采深层地下热水的不断增热水动态资料表明，深层地下热水钻井在开采的大，地下热水的水位动态资料日渐增加。开采井过程中井口的水温明显高于开采前的水温，同时
收稿日期：2010-12-31；改回日期：2011-03-16：贵任编辑：或开静。基金项目：北京市大学生科学研究与创业行动建设项目。
作者简介：赵散波，男，硕士研究生，1988年出生，水文地质学专业，从事水文地质与工程地质方面的研究。
Email; zhaojingb909090@ sina. com
通信作者：周训，男，教授，博士生导师，1963年出生，水文学与水资源专业，主要从事水文地质、环境地质方面的教学和
研究工作。Email：zhouxun eugh edu.cns