2D Model Study of CO₂ Plumes in Saline Reservoirs by Borehole Resistivity Tomography

Table 1

All possible 4-pole tripotential configurations α and β (nonequivalent, nonreciprocal) of a survey between two borehole electrode arrays.

Group
Configure	Inhole		Crosshole
	4-0	0-4	3-1	1-3	2-2
α	CPPC-0	0-CPPC	CPP-C	C-PPC	CP-PC
β	CCPP-0	0-CCPP	CCP-P	C-CPP	CC-PP

For example, group 4-0 denotes for number of electrodes (current, C/potential, P) in the first (4) and second (0) boreholes, respectively.