天津塘沽、天船井水位异常机理的初步探讨

发布时间：2018-05-21 12:10

本文选题：水平层状含水层一维模型 + 横波分裂　；参考：《地震工程学报》2016年S1期

【摘要】：天津地区天船、塘沽两口浅层承压井自2013年以来陆续出现突升、突降异常变化。虽经水质检测结果认为井水可能受到工业污染,异常信度较低,但通过多方面的环境调查,至今未查到污染源和抽水等环境干扰。依据天船、塘沽两口井现有数据连续性和稳定性好、异常映震率高等特点,并结合距塘沽井28km的同层位潘庄井数据(参考对比),利用1水平层状含水层一维模型的含水层应力与井水位变化关系式、2邻近测震台站近场地震序列Sg震相剪切波分裂、3区域主要断裂库伦应力估算等三个方面所反映的不同深度应力变化结果,初步分析认为塘沽井和天船井所在局部区域存在由深部至浅部的应力扰动情况,并且所反映的应力变化在时间和空间上具有较好的同步性。
[Abstract]:Since 2013, two shallow confined wells in Tianchuan and Tanggu in Tianjin area have been suddenly rising and dropping abnormally. Although it is considered that the well water may be polluted by industry and the abnormal reliability is low, the environmental interference such as pollution source and pumping water has not been detected through various environmental investigations. According to the characteristics of Tianchuan and Tanggu two wells, such as good continuity and stability of existing data, high abnormal seismic response rate, etc. Combined with the data of Panzhuang well in the same horizon from Tanggu well 28km (reference contrast), the relation between aquifer stress and well water level variation in one dimensional model of 1 horizontal layered aquifer is used in the near field seismic sequence Sg shear of adjacent seismograph station. Coulomb stress estimation of the main faults in the wave-splitting area reflects the variation of stress at different depths. The preliminary analysis shows that the stress disturbance from deep to shallow exists in the local area of Tanggu well and Tianyuan well, and the stress changes reflected by them have good synchronism in time and space.
【作者单位】：天津市地震局;中国地震局地球物理研究所;
【基金】：地震科技星火计划(XH16006Y) 国家自然基金(41304048) 中国地震局监测、预测、科研三结合课题(150201);中国地震局定向跟踪任务(2016010313)
【分类号】：P315.723

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