Texas and OK are having a race to the top. Texas has the advantage of increasing faster, but OK has been at it a long time. Who will crack the 4 barrier? I've totally lost track of the megathrusts down by Texas, but they must have a hanging wall there, or there would be no major injection. Many injection sites go into the Cambrian sandstone, but that is dribs and drabs. To make real money, you need to go into fractured Precambrian, and the water flows like beer down Rob Ford's throat.