Abstract: An improved method is disclosed for bringing a well under control by injecting a well-controlling fluid into an adjacent well, through the subterranean formation, and thence into the out-of-control well, wherein the improvement lies in a particular sequence of steps whereby fluid communication between the boreholes is established or improved.

Abstract: A fracturing method wherein (a) a viscous, prop free fluid is injected into a new or preexisting fracture to widen and extend the fracture, (b) a viscous prop carrying fluid is injected in one or more stages, (c) a viscous prop free spacer is injected, (d) a low viscosity inefficient penetrating fluid is injected, all of the foregoing being injected at rates and pressures calculated to prevent said fracture from healing, (e) injection of fluids at rates and pressures calculated to prevent said fracture from healing is ceased (including the embodiments of injecting a low viscosity penetrating fluid at a matrix rate, ceasing injection entirely, flowing back the well, or a combination thereof), and thereafter at least steps (a) and (b) are repeated.