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地震 ›› 2025, Vol. 45 ›› Issue (1): 16-31.doi: 10.12196/j.issn.1000-3274.2025.01.002

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川05井动水位对典型地震的映震效能分析

陆丽娜1,2, 俞美艳1, 李静1,2, 杜宁1, 袁有恩1,2, 贾建鹏1,2   

  1. 1.防灾科技学院, 河北 三河 065201;
    2.河北省地震动力学重点实验室, 河北 三河 065201
  • 收稿日期:2023-03-01 接受日期:2024-05-12 发布日期:2025-04-15
  • 作者简介:陆丽娜(1983-), 女, 天津市人, 副教授, 主要从事流体地球化学研究。 E-mail: lulina@cidp.edu.cn
  • 基金资助:
    中央高校基本科研业务费项目(ZY20110204); 河北省大学生创新创业项目(S202211775010)

Analysis on Reflecting Earthquake Ability of Dynamic Ground Water Level in the Chuan No.05 Well to Typical Earthquakes

LU Li-na1,2, YU Mei-yan1, LI Jing1,2, DU Ning1, YUAN You-en1,2, JIA Jian-peng1,2   

  1. 1. Institute of Disaster Prevention, Sanhe 065201, China;
    2. Hebei Key Laboratory of Earthquake Dynamics, Sanhe 065201, China
  • Received:2023-03-01 Accepted:2024-05-12 Published:2025-04-15

摘要: 川05井地处川滇地区, 是分布于昔格达—元谋断裂西端的地震观测井。 川05井同震响应的统计数据显示, 其动水位的响应时间为1~85 min, 响应幅度为1~29 mm, 响应形态包括振荡型、 脉冲型、 阶变型和阶变—振荡型。 本文通过统计川05井的记震分布范围, 计算地震发生时井的地震能量密度, 分析该井的映震能力, 得出如下结论: 当震中距(r)和震级(M)满足关系式logr≤0.95M-3.35时, 川05井动水位发生同震响应的可能性较大; 对于MS8.0以上地震, 川05井具有显著的映震能力, 水位变化幅度受震级和震中距的约束较大; 触发川05井动水位响应的能量密度e(r)量级范围为10-6~10-2 J/m3, 当能量密度e(r)≥10-3 J/m3(量级)时, 则能引起水温产生震后阶变。

关键词: 川05井, 动水位, 地震能量密度, 响应特征, 映震

Abstract: The Chuan No.05 well, located in the Sichuan-Yunnan region, is a seismic observation well located at the west end of the Xigeda-Yuanmou fault. The statistical data of the coseismic response of the well show that the response time of the well dynamic ground water level is 1~85 min and the response amplitude is 1~29 mm. The response modes include oscillation type, pulse type, step-change type and step-change-oscillation type. By calculating the seismic distribution range and the seismic energy density of the well, the seismic reflection ability of the well is analyzed. The results show that when the epicentral distance (r) and magnitude (M) meet the relation logr≤0.95M-3.35, the dynamic ground water level of the Chuan No.05 wells more likely to have a coseismic response. For earthquakes above MS8.0, the well has a significant ability to reflect earthquakes, and the variation range of water level is greatly constrained by the magnitude and epicenter distance. It is found that the energy density e(r) of the dynamic ground water level for the response of the Chuan No.05 is in the range of 10-6~10-2 J/m3, and when the energy density e(r)≥10-3 J/m3, the water temperature can produce post-seismic step change.

Key words: Chuan No.05 well, Dynamic ground water level, Seismic energy density, Response characteristic, Earthquake reflecting

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