河北冀24井流体观测同震响应特征分析

Analysis of Coseismic Response Characteristics of Hebei No.24 Well Fluid Observation

为研究河北冀24井数字化流体观测对远场大震同震响应,对2010—2018年国内外发生的10次Ms>8.0地震进行同震响应分析。结果表明河北冀24井对远场大震具有较好的映震能力。水位同震响应表现为振荡型,水位振荡幅度与震中距、震级、井-含水层系统自身特性、震源方位、震源机制、震中距以及地震波的传播途径有关,水温同震响应表现为下降—上升—恢复变化,水温同震下降的速率受控于水位振荡的幅度与频次,具体表现为水位振荡水温下降,响应形态不受地震方位、震级、震源深度以及震中距的影响。

In order to understand the response of digital fluid to far-field earthquake in the coseismic response characteristics of 10 large far-field earthquakes Ms>8.0 from 2010 to 2018 were analyzed,The results show that Hebei No.24 well,has a good ability to reflect large earthquakes in the far field.The type of water level coseismic response is always oscillatory.The amplitude of water level oscillation is closely related to the epicenter distance,magnitude,characteristics of well aquifer system,source orientation,source mechanism,epicenter distance and propagation path of seismic wave;The water temperature always decreases,rises and recovers in response to the same earthquake.The rate of water temperature drop depends on the amplitude and frequency of water level oscillation.The water temperature drop of water level oscillation is independent of the earthquake direction,magnitude,focal depth and epicenter distance.