地震研究

通过理论分析和现场观测实验,对云南曲江地震观测井水温观测出现的持续升温变化进行了成因分析,证明了观测井泄流口的“堵塞”或“疏通”可产生水温持续的变化。实验还发现水温可以记录到固体潮效应,对地壳动力作用有响应,地震观测井水温变化可用作地壳应力-应变关系的分析。最后建议重新放置水温探头到更适宜的位置,以提高该井水温观测的映震能力。

Based on theoretical analysis and field observation experiments,the causes of continuous temperature rise of Qujiang well in Yunnan are analyzed,it is proved that the main reason for the change is the blockage and dredging of the outlet of the observation well. For the abnormal change of water temperature,based on theoretical analysis and experimental results,we have made a judgement. Secondly,it is found that the water temperature can record the change of the earth tide,the water temperature can also respond to the dynamic action of the earth's crust,the variation of water temperature in the seismic well can be used as an analysis of the crustal stress-strain relationship. It is suggested that the water temperature probe of the well be repositioned to a more suitable location to enhance the earthquake reflecting ability of the well.

引言
1 曲江地震观测井概况
2 曲江井水温持续升温特征
3 水温变化分析及实验
4 井水温持续升温及固体潮关系的理解与解释
5 结论

图1 曲江井地质构造图<br/>Fig.1 Geological structure diagram of the Qujiang well

图1 曲江井地质构造图
Fig.1 Geological structure diagram of the Qujiang well

表1 曲江井观测项目一览表<br/>Tab.1 Observation items of the Qujiang well

表1 曲江井观测项目一览表
Tab.1 Observation items of the Qujiang well

图2 曲江井水温随深度变化图<br/>Fig.2 Variation of water temperature with depth of the Qujiang well

图2 曲江井水温随深度变化图
Fig.2 Variation of water temperature with depth of the Qujiang well

表2 曲江井水温异常对应地震统计表<br/>Tab.2 Statistics of abnormal temperature of the Qujiang well corresponding to the earthquakes

表2 曲江井水温异常对应地震统计表
Tab.2 Statistics of abnormal temperature of the Qujiang well corresponding to the earthquakes

图3 曲江井水温、水位、泄流口水温及江川日降雨量曲线<br/>Fig.3 Water temperature,water level,water temperature of drainage port of Qujiang well and daily rainfall of Jiangchuan

图3 曲江井水温、水位、泄流口水温及江川日降雨量曲线
Fig.3 Water temperature,water level,water temperature of drainage port of Qujiang well and daily rainfall of Jiangchuan

图4 曲江井井口装置示意图<br/>Fig.4 Sketch map of Qujiang observation well and its wellhead device

图4 曲江井井口装置示意图
Fig.4 Sketch map of Qujiang observation well and its wellhead device

图5 曲江井水位、水温固体潮日变化与其固体潮理论值<br/>Fig.5 Diurnal variation of earth tide of water level and water temperature in Qujiang well and its theoretical value

图5 曲江井水位、水温固体潮日变化与其固体潮理论值
Fig.5 Diurnal variation of earth tide of water level and water temperature in Qujiang well and its theoretical value

图6 曲江井温泉水δ2H-δ18O同位素与全球大气降水线对比图<br/>Fig.6 Comparison chart of the Qujiang hot spring water well δ2H-δ18O isotope and the global meteoric waterline

图6 曲江井温泉水δ2H-δ18O同位素与全球大气降水线对比图
Fig.6 Comparison chart of the Qujiang hot spring water well δ2H-δ18O isotope and the global meteoric waterline

图7 2008年5月12日汶川8级地震曲江井水温同震变化<br/>Fig.7 Coseismal changes of water temperature in Qujiang well during the Wenchuan M8 earthquake on May 12,2008

图7 2008年5月12日汶川8级地震曲江井水温同震变化
Fig.7 Coseismal changes of water temperature in Qujiang well during the Wenchuan M8 earthquake on May 12,2008

蔡永恩,殷有泉,王仁.1992.热状态对地震发生的影响[J].地球物理学报,35(2):204-213.
车用太,刘成龙,鱼金子.2008.井水温度微动态及其形成机制[J].地震,28(4):21-22.
马玉川,刘耀炜,任宏微,等.2010.自流井水温固体潮效应及其应变响应能力[J].中国地震,26(2):172-182.
马宗晋,傅征祥,张郢珍,等,1982.1966～1976年中国九大地震[M].北京:地震出版社,111-112.
孙小龙,刘耀炜.2006.应力加载作用引起地下水微温度场变化的研究综术[J].国际地震动态,(7):17-26.
腾吉文.2003.固体地球物理学概论[M].北京:地震出版社,430-431.
晏锐,官致君,刘耀炜.2015.川西温泉水温观测及其在芦山MS7.0地震前的异常现象[J].地震学报,37(2):347-356.
杨竹转,邓志辉,杨贤和,等.2010.井孔水温动态变化的影响因素探讨[J].地震,30(2):71-79.
云南省地震局.2005.云南省地震监测志[M].北京:地震出版社,526-536.

备注

引言

1 曲江地震观测井概况

2 曲江井水温持续升温特征

3 水温变化分析及实验

4 井水温持续升温及固体潮关系的理解与解释

5 结论

期刊信息