Assume the fluid production is coming from a fracture. The lateral dimension, W, of the fracture is 100 cm, the fluid is a brine with a viscosity of 120 cP. The pressure at one end of the fracture is 300 psi and 2500 psi 20 feet away. Make a plot of the calculated response which would let you estimate the fracture aperture. Assume the fluid production is coming from a fracture. The lateral dimension, W, of the fracture is 100 cm, the fluid is a brine with a viscosity of 120 cP. The pressure at one end of the fracture is 300 psi and 2500 psi 20 feet away. Make a plot of the calculated response which would let you estimate the fracture aperture.