The trade-offs involved with subsurface resistivity probing are studied for the case of a spherical anomaly. In particular, two-, three-, and four-electrode configurations are investigated. The three- and four-electrode configurations have similar results and have significantly better remote detection capabilities than does a two-electrode configuration. Cross-borehole probing is capable of detecting anomalous conditions at a greater range than is single-borehole probing.

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First page of Electrode configuration influence on resistivity measurements about a spherical anomaly
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