An analysis of turbulent fluid friction was made for data of vertical flow of C02-foam slurries. These data were obtained during a fracture stimulation in a uniquely-instrumented, 3.5-inch tubing string. Data were culled to steady state for each C02 cut, gel concentration, sand loading, and rate. Friction gradients were computed and a new friction correlation was developed. The correlation uses the friction factor concept for high speed, single phase flow by defining appropriate mixture density, viscosity, and Reynolds number from foam slurry properties.