</p><p >First Noah Brenner reveals the emerging tight-oil play in which Chesapeake is building up a position.</p><p >Then we address comments from North Dakota's oil regulator that companies have squeezed all the efficiency gains they can out of the Bakken. What does it mean for the future of the premier US shale play?</p><p >And we dig in to Upstream's <strong><a href="http://epaper.upstreamonline.com/upstreamfocusedition/19/1//?query="