183168 – Real-Time Friction Simulation for Accurate Calculation of Bottomhole Pressure during Stimulation in Open Hole Sliding-Sleeve Ball Seat Completions

Summary

Accurate estimation of hydraulic fracture geometry depends to a substantial degree on precise information about the pressure within the fracture itself. One approach is to directly measure pressure and pump rate on the surface, and to then computationally account for the fluid friction contributions of each component in the wellbore to deduce the bottomhole fracture pressure. This paper provides a background basis for traditional bottomhole pressure estimation and its shortcomings in the presence of sliding-sleeve completion systems. It then derives a test to identify the friction contribution of a sliding-sleeve completion system on-site in real-time and suggests a practical method for execution of this test on a well site.