Simulation and Analysis of Proppant Transport Patterns in Wellbore-Fracture Systems

Staged multi-cluster fracturing of horizontal wells is one the most important tools to achieve efficient development unconventional oil and gas reservoirs. The multi-stage technique forms complex fractures with multiple clusters branches in formation, causing competing diversions leading more proppant transport patterns, placement method determines flow conductivity fractures, so it necessary investigate patterns fractures. To address this issue, a field-scale geometric model established for numerical simulation, multiphase diversion pattern wellbore, distribution under different network conditions, optimization construction parameters are investigated. results obtained as follows: solid liquid phases each cluster well conforms trend variable mass flow; distributed at heel end sand unevenly among number branching affects transport; through sensitivity analysis influencing factors, pumping displacement, fluid viscosity particle size optimized, 14 m3/min, 5 mPa·s, 70/140 mesh, 12% ratio determined. This study has certain guiding significance block.