Paper: Jorge Italo Bahamon Pedrosa, Mark Briney, Carlos Blanco, Barry Peiser and Prentice Creel, Halliburton Energy Services

An operator was experiencing a fast decline in hydrocarbon production in one of their Clearfork Formation CO2 WAG flood patterns due to fracture communications between injectors and offset producers near Littlefield, Texas. In identified wells giving very poor sweep performance, injected Carbon Dioxide (CO2) freely communicated and broke through into offset producers. Following performing diagnostics to determine the extent and magnitude of the existing problem, designs and simulation analysis were developed on an identified well displaying a dominant fracture communication. A foamed Pozzolan slurry squeeze treatment was performed and monitored for purposes of drastically reducing if not completely eliminating the major injected flow entry in the well's open-hole interval and communicating via the reservoir to the offset producer. Elimination and or reduction in CO2 cycling through this eroded communicating fracture conduit has significantly benefited the sweep on hydrocarbon and improved the economics in this section of the WAG Unit.