The Optimal Sine Pulse Frequency of Pulse Hydraulic Fracturing for Reservoir Stimulation

Pulse hydraulic fracturing (PHF) is a key technique for reservoir stimulation. PHF can well accelerate the rupture of rock. However, supercharging mechanism not fully understood. The main reason that pressure distribution and its variation, especially peak characteristics, are unclear inside pipe fissure. present research focuses on sine pulse applied at inlet or fracture to reveal variation regularity with frequency, amplitude, length, diameter wave speed. First, weakly compressible Navier–Stokes equations were developed simulate fluid pressure. computation codes using MacCormack method validated by existing experimental data. Then, effect was studied Last, new frequency model built describe relationship between optimal speed length. results show there family frequencies which endpoint be significantly enhanced these frequency. It found depends fissure length At increased 100% more, cavitation phenomenon occurs. decreases when decrease in departure due friction drag wall. These landmark findings very important technique. In addition, universal predict shows develops frequency-controlled method, providing potential guide