In hard rock and stable shale formations where the horizontal open hole can be completed without a liner, selective testing and stimulation can be achieved using TAM’s PosiFrac® Straddle System. This flexible, multi-set inflatable system provides a means of selectively stimulating multiple sections of the open hole horizontal well with one run. In a Canadian well drilled in a low permeability carbonate reservoir, over 100 acid treatments were achieved on a single trip into the well using this robust system.