North American fields have been extensively drilled. And I mean that in the most pincushion sense of the word. There is no other area on the entire planet that has so many holes in it. Drilling the holes was one step, now comes the slow milking of the reserves. An expert told me once that this might be the real bonanza as it is supposed to be relatively low cost and could lay the foundation of shale baseload bleeders.
Recovering reserves left behind in mature horizontal wells requires refracturing with modern techniques. A new single-trip expandable technology enables operators to restimulate existing perforations, to increase production and EUR with relatively low capital investment.