| In recent years research on seismo-electric effect(SEE) is still a focus in the engineering society. SEE has a lot of potential applications in the area of earthquake prediction, engineering prospecting and petrol well logging, especially explore the petrol, gas, and water in the underground. However, the seismo-electric exploration can be used into detecting the oil in logged well. Compared with other methods, this exploration cannot only directly explore the contains of the underground, but also is sensitive to Fault Zone.First, Biot established the mechanics theory of elastic wave in fluid-saturated porous media, which to be called Biot.s theory. This theory made some assumptions to the porous media to be research:(1)the scale of pore and solid-phase particle is far less than the wavelength;(2)the pore is connected;(3) Solid-phase are connected. In these assumptions, Biot obtained the stress-strain relations and equations of motion, and gived the plane wave.s solutions in the uniform pore medium The theory forecasted whether exist slow P wave in porous media.This article simply introduces the production mechanism of seismoelectric effect. The elastic waves are coupled with the electromagnetic waves if there is an electric double layer(EDL) at the mineral-water interface. It is explained why such a coupling occurs when a fast P wave or a slow P waves, or a shear wave propagates. It is noted that electrokinetic effect is related to fluid motion, and is primarily related to ion migration in the movable fluid.In this paper the seismo-electric effect has been introduced first, and the experiment system for SEE has been constructed. The observation and measurement on SEE phenomenon is then conducted based on the system mentioned above. The SEE signals have been first observed through the pentrough experiment and the measurement data were discussed initially. Some results meaningful to seismo-electric well logging were also obtained from this work. |
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