| 仙女山断裂带地下流体观测井水位同震响应对比分析 |
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| 引用本文： | 陈 玮,张丽芬,张卫华,赵艳南,周紫岩.仙女山断裂带地下流体观测井水位同震响应对比分析[J].大地测量与地球动力学,2020,40(1):104-110. |
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| 作者姓名： | 陈 玮 张丽芬 张卫华 赵艳南 周紫岩 |
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| 摘 要： | 系统研究三峡库区大河口井、周坪井和郭家坝井对两次远场大地震和4次近场中强地震的同震响应特征,并进行差异分析;同时从地震能量密度、同震响应幅度与震级、井震距的关系等多方面对比3口井的映震能力。结果表明,大河口井的映震能力最强;3口井远场水位同震响应可能由远场面波所引起,近场同震响应主要受区域挤压应力影响,同时受到岩性以及井孔所在断裂构造部位的影响。
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| 关 键 词： | 同震响应 地震能量密度 震级 井震距 |
Analysis on Comparisons of Co-Seismic Response of Underground Water along the Xiannüshan Fault Zone |
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| CHEN Wei,ZHANG Lifen,ZHANG Weihua,ZHAO Yannan,ZHOU Ziyan.Analysis on Comparisons of Co-Seismic Response of Underground Water along the Xiannüshan Fault Zone[J].Journal of Geodesy and Geodynamics,2020,40(1):104-110. |
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| Authors: | CHEN Wei ZHANG Lifen ZHANG Weihua ZHAO Yannan ZHOU Ziyan |
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| Abstract: | We systematically analyze the coseismic response characteristics to 2 earthquakes in the far field and 4 medium-strong earthquakes in the near field of the Dahekou, Zhouping, and Guojiaba wells in the Three Gorges reservoir area. Difference analysis is carried out. In addition, we compare the seismic reflection capability of these three wells with respect to seismic energy density, coseismic response amplitude and magnitude, and well seismic distance. The results show that: 1) Dahekou well has stronger reflection ability than the other two wells. 2) The coseismic response of the far-field water level of the three wells may be caused by the far-field wave triggering. The near-field coseismic response is mainly due to the regional crushing stress, and is also affected by the lithology and the fracture structure of the wellbore. |
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| Keywords: | coseismic response seismic energy density magnitude well-hypocenter distance |
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