A large-scale visual fracture simulation system and experimental schedule have been designed with consideration of fiber adding method, fiber concentration, and temperature to study the effect of fiber on fiber fracturing. Experimental results show that fracturing fluid carrying capacity was the best through adding fiber, then crosslinking agent, and finally proppant. In a certain temperature range, the higher the fiber concentration, the more stable the network, and the carrying capacity was better, but it became worse when the temperature exceeded 80℃. With increasing of fiber concentration, the sand bank became flat, and the amount of proppant in deep fracture increased, leading to increase of the effective length of the fracture. This study may provide reference for the design of fiber sand fracturing.

fiber sand fracturing  /  method of adding fiber  /  fiber concentration  /  sand bank  /  visual fracture simulation system