Much has been made about the impressive gains in efficiency and productivity in the shale patch, as new drilling techniques squeeze ever more oil and gas out of new wells. But the limits to such an approach are becoming increasingly visible. The U.S. shale revolution is running out of steam. The collapse of oil prices has forced drillers to become more efficient, adding more wells per well pad, drilling longer laterals, adding more sand per frac job, etc. That allowed companies to continue to post gains in output despite using fewer and fewer rigs. However, the efficiency gains may have been illusory, or at best, incremental progress instead of revolutionary change. Rather than huge innovations in drilling performance, companies were likely just trimming down on staff, squeezing suppliers, and drilling in the best spots – perhaps all sensible stuff for companies dealing with shrinking revenues, but nothing to suggest […]