[1]字承柱,张 翔,张 源,等.洱源滇20井水温异常特征分析与机理研究[J].华南地震,2025,(01):59-67.[doi:10.13512/j.hndz.2025.01.08]
 ZI Chengzhu,ZHANG Xiang,ZHANG Yuan,et al.Characteristics and Mechanism of Water Temperature Anomalies in Eryuan Dian 20 Well[J].,2025,(01):59-67.[doi:10.13512/j.hndz.2025.01.08]
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洱源滇20井水温异常特征分析与机理研究()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2025年01期
页码:
59-67
栏目:
地震科学研究
出版日期:
2025-03-30

文章信息/Info

Title:
Characteristics and Mechanism of Water Temperature Anomalies in Eryuan Dian 20 Well
文章编号:
1001-8662(2025)01-0059-09
作者:
字承柱张 翔张 源杨树锋
云南省地震局,昆明 650224
Author(s):
ZI ChengzhuZHANG XiangZHANG YuanYANG Shufeng
Yunnan Earthquake Agency , Kunming 650224, China
关键词:
洱源滇20井水温观测异常特征异常机理
Keywords:
Eryuan Dian Well 20Water temperature observationAnomaly characteristicAnomaly mechanism
分类号:
P315.723
DOI:
10.13512/j.hndz.2025.01.08
文献标志码:
A
摘要:
基于震例对洱源滇20井水温观测资料进行分析,结果表明,水温异常与测点周边200km区域中强地震的发生具有良好的中短期指示意义,震前异常多表现为下降变化,持续时间2~6个月,变化幅度在100‰~400‰℃,在异常持续过程中或结束后2个月以内发震。根据总结的异常特征并结合水化学分析、温度梯度分析、水位观测分析,对异常可能的原因进行了研究,洱源滇20井水温异常的原因可能是区域构造活动增强所致,拉张力作用下,孔隙压力减小造成井水回流到含水层中,井筒内发生热对流,导致传感器所处的水温出现下降。
Abstract:
Based on the earthquake cases,the water temperature observation data of the Eryuan Dian 20 well were analyzed. The results showed that the water temperature anomaly has a good short-term indicating significance for the occurrence of medium strong earthquakes in the 200 km area around the measurement point. Before the earthquake, the anomalies mostly showed a downward change, lasting for 2-6 months, with a change range of 100‰ to 400‰ ℃. Earthquakes occurred either during the ongoing thermal anomaly phase or within two months after the anomaly continued. Based on the summarized abnormal characteristics and combined with hydrochemical analysis, temperature gradient analysis, and water level observation analysis, the possible causes of the anomalies were studied. The reason for the abnormal water temperature in the Eryuan Dian 20 well may be due to enhanced regional tectonic activity. Under the action of tension, the decrease in pore pressure causes the well water to flow back into the aquifer,leading to thermal convection inside the wellbore and the decrease of the water temperature at the sensor location.

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备注/Memo

备注/Memo:
收稿日期:2024-05-18
作者简介:字承柱(1988-),男,工程师,主要从事地震监测、运维工作。E-mail:610996163@qq.com
更新日期/Last Update: 2025-03-30