Exploring Borehole-to-Borehole Electrical Resistivity Surveys
We like to dig into various topics on our blog. One method that we want to drill into today is the borehole-to-borehole electrical resistivity survey.
We’ve broached the subject of borehole-to-borehole surveys a couple of times on our blog. We mentioned it in our post about the Bipole-Bipole array and our Panama seminar recap. The Panama case is fascinating because it utilizes our SwitchBox Grid and DIY cables. Today, let’s delve into the concept of this survey, walk through the step-by-step process, and unearth its applications in groundwater and mineral exploration, as well as other subsurface investigations. (We’re all out of borehole puns, we promise.)
Understanding Borehole-to-Borehole Electrical Resistivity Surveys
As the name suggests, a borehole-to-borehole electrical resistivity survey is a technique employed to measure the electrical resistivity of the subsurface between two boreholes. By injecting an electrical current into one borehole and measuring the voltage between two electrodes located in the same or another borehole, we can determine the resistivity of the surrounding subsurface materials. The resolution is uniform, no matter what depth you are scanning.