基于四川盆地南部（即川南）地区深层页岩气的开发实践，以负面冲击为主的井间压裂窜扰已成为制约开发效率和效益的关键因素，对深层页岩气的可持续开发提出了重大挑战。针对川南自贡区块页岩气平台井为目标区域，通过结合岩心、测井和地震等多种信息源精细刻画平台真实天然裂缝分布。在此基础上，基于非常规裂缝模型（unconventional fracture model, UFM）建立多井复杂裂缝扩展模型，将天然裂缝划分为强、中、弱三个发育区域，重点分析了井距、施工排量和簇间距等影响参数对多簇裂缝在不同天然裂缝发育条件下的差异化竞争扩展规律，阐明了深层页岩平台井压裂裂缝窜扰特征及防窜对策。研究结果表明：在天然裂缝强发育区，裂缝网络复杂，水力裂缝易在近井区被捕获，建议采用较高排量、较小簇间距和较高黏度压裂液，以减少压窜风险；但若存在大断层或大裂缝，需调整压裂参数以防止井间沟通。天然裂缝中度发育区则需优化压裂参数，以平衡裂缝扩展与压窜控制，确保储层动用率。在天然裂缝弱发育区，水力裂缝易均匀扩展，需精细化控制施工参数，以避免井间裂缝沟通。基于上述特征，形成了防窜压裂施工参数优化图版，为现场压裂作业提供指导。结果表明，结合天然裂缝分布进行差异化设置施工参数能够降低压裂窜扰影响，为提高川南地区页岩气井的综合开发效益提供了技术支撑。

Based on the development practice of deep shale gas in the southern Sichuan Basin, inter-well frac-hit dominated by negative impacts has become a key factor restricting development efficiency and benefits, posing significant challenges to the sustainable development of deep shale gas. Shale gas platform wells in the Zigong Block of southern Sichuan were taken as the target area. The actual distribution of natural fractures on the platforms was finely characterized by combining various sources including core, logging, and earthquake information. On this basis, a multi-well complex fracture propagation model was established using the UFM (unconventional fracture model), in which natural fractures were categorized into three levels of development: strong, moderate, and weak. The effects of key parameters such as well spacing, pumping rate, and cluster spacing on the competitive propagation behavior of multi-cluster fractures under varying natural fracture conditions were analyzed. The characteristics of frac-hit and countermeasures for deep shale platform wells were clarified. The results indicate that in zones with strongly developed natural fractures, with complex fracture networks and hydraulic fractures are more likely to be captured in the near-wellbore region. In such cases, a higher pumping rate, smaller cluster spacing, and higher viscosity fracturing fluid are recommended to reduce frac-hit risks. However, the presence of large faults or dominant fractures may require further adjustment of fracturing parameters to prevent inter-well communication. In moderately fractured zones, fracturing parameters should be optimized to balance fracture propagation and frac-hit control, ensuring effective reservoir stimulation. In weakly fractured zones, hydraulic fractures tend to propagate uniformly, and precise control of construction parameters is necessary to avoid inter-well fracture communication. Based on these findings, an optimization chart for anti-interference fracturing construction parameters adjustment was developed to guide field fracturing operations. It is concluded that the differentiated design of construction parameters based on the distribution of natural fractures can effectively reduce the impact of frac-hit and provides technical support for improving the overall development performance of shale gas wells in southern Sichuan.