Waterflood front imaging using segmentally insulated well liners as on-demand electrodes

A system for monitoring waterfront movement in a subsurface formation, the system comprising:

• a plurality of well liners disposed in at least one well, wherein each well liner comprises an electrically conductive material having a shape of a hollow cylinder;
• at least one electrically insulating spacer disposed between two of the plurality of well liners to form at least one on-demand electromagnetic source electrode;
• at least one electrically insulating spacer disposed between two of the plurality of well liners to form at least one on-demand electromagnetic receiver electrode;
• a well logging tool comprising:
• a cylindrical housing having an outer diameter less than an inner diameter of the hollow cylinder;
• a plurality of insulated centralizers disposed around the cylindrical housing;
• a plurality of electrical connections that selectively connect to at least one of the plurality of well liners;
• a power connection that receives power from a surface location;
• and
• a communication connection that communicates with the surface location;
• and
• a conveyor that disposes the well logging tool within the plurality of well liners.