ClearView recently completed a BHIP survey using a ‘tomographic’ mode.

The main thing with our cross-hole IP system is that it’s simple, with single wires down each hole, and there are many readings taken at different angles making the inversion converge very quickly even with tight constraints (e.g., UBC low chi factor). 

Just a couple of off-the-shelf winches and new IP wire.  We mark the wire at 10-metre intervals as slippage on the counter is inevitable.

We can use simple rules of ‘superposition’ for apparent resistivity measurements, but for chargeability which is susceptible to anisotropy, this is the preferred method.

Two Cross-hole IP winches and counters: P1, P2 plus P3 reference electrode on surface