聊古一井地下流体场源兆异常特征及震情预测检验
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摘要
聊古一井由于其所处的特殊构造部位、良好的水文地质条件、井孔条件和连续可靠的观测,获得了一批有价值的实际地震观测资料,该井水化学组分的异常变化对其周围500 km范围内的5级以上地震具有良好的映震能力。在对聊古一井自1981-01投测以来观测到的水化学地震前兆异常进行综合分析的基础上,探讨了聊古一井水化学异常变化的场源兆特征及异常形成的物理力学机制和地震预报意义。利用上述研究结果,对聊古一井气体总量2003-05~2003-10出现的低值异常变化进行了分析和震情预测,取得较好的效果。
As the Liaogu-1 well is located in a special tectonic zone with good hydrogeological condition,continuous and reliable observations have been performed resulting in a wealth of valuable data of seismic observations,which indicate that anomalous variations of hydrochemical elements serves as a good precursor to earthquakes with M≥5.0 occurring in the range of 500 km around the well.Based on integrated analyses of the seismic precursors of hydrochemical elements in the Liaogu-1well since the observation began in January,1981,the characteristics of hydrochemical elements are investigated as well as their forming mechanism and predictive significance as the seismic precursors from seismic source and tectonic field.Based on the above studies,we have also analyzed lower anomalous changes of total quantity of gases released from the Liaogu-1 well from May to October 2003,and achieved a satisfactory result in the test of earthquake prediction.
As the Liaogu-1 well is located in a special tectonic zone with good hydrogeological condition,continuous and reliable observations have been performed resulting in a wealth of valuable data of seismic observations,which indicate that anomalous variations of hydrochemical elements serves as a good precursor to earthquakes with M≥5.0 occurring in the range of 500 km around the well.Based on integrated analyses of the seismic precursors of hydrochemical elements in the Liaogu-1well since the observation began in January,1981,the characteristics of hydrochemical elements are investigated as well as their forming mechanism and predictive significance as the seismic precursors from seismic source and tectonic field.Based on the above studies,we have also analyzed lower anomalous changes of total quantity of gases released from the Liaogu-1 well from May to October 2003,and achieved a satisfactory result in the test of earthquake prediction.
引文
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[4]周翠英.菏泽5.9级地震前后鲁西豫北地区小震应力场变化[J].地震,1987,(3):12-19
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[6]马瑾,刘力强,马胜利,等.复杂构造应力场扰动与发震构造识别问题的研究[J].地震地质,1995,17(4):372-382
[2]耿杰.聊古一井水溶气体的震前异常特征[J].地震研究,1996,19(4):356-361
[3]王炜,宋俊高,李文英.菏泽5.9级地震前地震活动异常图像[J].华北地震科学,1984,(4):35-39
[4]周翠英.菏泽5.9级地震前后鲁西豫北地区小震应力场变化[J].地震,1987,(3):12-19
[5]戴维乐.菏泽5.9级地震前小震波速比时空变化特征[J].华北地震,1991,(1):46-50
[6]马瑾,刘力强,马胜利,等.复杂构造应力场扰动与发震构造识别问题的研究[J].地震地质,1995,17(4):372-382
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