Nanosensors for oil reservoirs

Nanowerk reports that the Advanced Energy Consortium (AEC), is to develop subsurface nanosensors that can be injected into oil and gas well bores.

By virtue of their very small size, these sensors would migrate out of the well bores and into the pores of the surrounding geological structure to collect data about the physical characteristics of hydrocarbon reservoirs. The data collected could enable the more efficient exploitation of hydrocarbon resources

You would able to know more precisely how much oil was left and where it was so you could better determine how to get the most out.