Effects of Fracturing Parameters on Fracture Unevenness During Large-Stage Multi-Cluster Fracturing in Horizontal Wells

Horizontal wellswith multi-cluster fracturing technology is an effective approach to exploit unconventional hydrocarbon reservoirs. The on-site diagnosis results indicate that fractures always tend propagate unevenly due stressinterference, therefore it very essential study the effect of parameters on fracture propagation unevenness. In this paper, model (UFM, Unconventional Fracturing Model) used unevenness in a large stage. This has been validated with actual case Longmaxi shale. investigated include completion (cluster spacing, number perforations per cluster), pumping (fluid injection intensity and proppant intensity). Our simulation show firstly reducing spacing will increase stress interference, andhydraulic exhibit “radial” pattern. Secondly, perforation single cluster can promote more uniform fractures. Thirdly, increasing fluid length, but also Besides, strength little average length length. Finally, setting reasonable obtain propagation. Meanwhile reach goal propagating evenly. paper provides certain reference for optimization large-stage wells.