Numerical Investigation of Influence of Fluid Rate, Fluid Viscosity, Perforation Angle and NF on HF Re-Orientation in Heterogeneous Rocks Using UDEC T-W Method

Numerical simulation is very useful for understanding the hydraulic fracture (HF) re-orientation mechanism from artificial weaknesses. In this paper, UDEC T-W (Trigon–Weibull distribution) modeling method adopted to simulate fracturing process in heterogeneous rocks. First, reliability of validated against previous laboratory experiments and numerical simulations. Then effects fluid rate, viscosity, perforation angle natural (NF) on HF rocks are studied independently. The results show that depends combined effect these factors. distance increases significantly, final trajectory becomes more complex guiding propagation path evident with increase if performed relatively rocks, while differential stress main influencing factor likely dictate become homogeneous. However, increasing viscosity rate can attenuate impact promote along direction. Besides, NFs also important affecting induce secondary some cases