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为改善井壁内流体的流通状况,例如为了开发干热岩中的热能,人们采用钻孔水压致裂法。重要的问题是要查明实际上是否产生了破裂以及破裂是否沿某方向延伸。根据注入井中的水(稍含盐)和井下围岩间电导率的差别(通常为电阻的差别),用电法可以轻而易举地解决上述问题。地球物理研究中心所使用的技术是根据很简单的原理:把电极A插入井深h处的水中,
In order to improve the circulation of fluid in the borehole wall, for example, to develop thermal energy in dry-hot rocks, a hydraulic fracturing method was used. The important issue is to find out if in fact a rupture has occurred and if the rupture has taken a certain direction. Depending on the difference between the water (slightly saline) injected into the well and the conductivity between the downhole rock masses (usually the difference in resistance), the above problem can be easily solved by the electrical method. The technique used by the Geophysical Research Center is based on the simple principle of inserting electrode A into the water at depth h,