关键词: 孔眼冲蚀；定向射孔；长井段多簇；数值模拟；玛湖 

Abstract: Long-interval multi-cluster fracturing is to achieve uniform and effective fracture opening and propagation for each cluster by increasing the interval length and controlling the number of perforation holes. In the process of fracturing，the phenomenon of hole erosion can cause imbalanced fluid feed among clusters，resulting in the failure of uniform fracture propagation. Directional perforating technology can mitigate the impact of hole erosion to a certain extent，but the pattern of hole erosion rate versus perforating angle is still unclear. In this paper，the hole erosion rate under directional perforating conditions is studied using the approach of numerical simulation to investigate the hole erosion pattern for different perforating angles by gradually analyzing from a single cluster to multiple clusters. The results show that the hole erosion rate is the minimum when the perforating angle is 90°，and the difference in hole erosion rates between different clusters is the minimum when the perforating angle is 80°，which can alleviate the negative impact of uneven fluid distribution due to hole erosion. The study findings are of significant reference for field fracturing jobs. 

Key words: hole erosion；directional perforating；long-interval multi-cluster；numerical simulation；Mahu