Hydraulic fracture height growth control

摘要: A method is given for creating a fracture, in subterranean formation, that has fluid flow barrier at the top, bottom, or both top and bottom. The applied before during conventional hydraulic fracturing treatment used to limit undesired vertical growth of fracture out productive zone. lower-viscosity pad initiate fracture; higher-viscosity containing particles then injected; particle-free injected promote settling (or rising) finger through slug cut it into an upper lower portion. If be bottom are denser than fluids; if less dense fluids. Optionally, between transport stage subsequent stage, there may higher viscosity pushes farther fracture. To provide one treatment, higher-viscosity, include than, more fluid.