Hydroelectric coupling in a clayey material
Hydroelectric coupling in a clayey material
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DOI：
10.1029/2000gl012268
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发表时间：
2001-04
影响因子：
5.2
通讯作者：
André Revil;Philippe Leroy
中科院分区：
文献类型：
--
作者：
André Revil;Philippe Leroy
在过去的四年里，在地球表面记录的水电耦合产生的自电位异常受到了相当大的关注。地球物理学的应用包括利用这种现象绘制地下流体流动图、研究热液活动、利用自然电位异常监测火山活动，以及通过利用动电性质的电磁前兆预测地震活动的可能性，目前仍在争论之中。我们在这里模拟两个关键参数相关的水力耦合在粘土多孔岩石。这两个参数分别是电位和比表面电导率，它们取决于孔隙水/矿物界面的电化学。它们被建模的情况下，饱和的氯化钠盐水使用三层模型（TLM），其中的参数进行了优化，使用单纯形算法的高岭石。
The hydroelectric coupling generating self‐potential anomalies recorded on the Earth's surface has received a considerable attention in the last four years. Geophysical applications include the use of this phenomenon for mapping subsurface fluid flow, the study of hydrothermal activity, and the use of self‐potential anomalies to monitor volcanic activity and the possibility, still debated, of seismic activity forecasting through the use of electromagnetic precursors of electrokinetic nature. We model here two key‐parameters relevant of the hydroelectric coupling in clayey porous rocks. These two parameters are the ζ‐potential and the specific surface conductivity, which depend on the electrochemistry of the pore water/mineral interface. They are modeled in the case of a kaolinite saturated by a NaCl brine using a triple layer model (TLM) in which the parameters are optimized using the Simplex algorithm.