The main area of the Jiaoshiba anticline of the Fuling shale gas field was taken as the research object, laboratory rock mechanical experiments and direct shear experiments were conducted to clarify the mechanical anisotropy characteristics and parameters of rock samples with rich beddings. Based on the experimental results, a 3D fracture propagation model of the target reservoir taking mechanical anisotropy, weak bedding plane and vertical stress difference into account was established by the discrete element method to analyze distribution patterns of hydraulic fractures under different bedding densities, mechanical properties, and fracturing engineering parameters (including perforation clusters, injection rates and fracturing fluid viscosity). The research results show that considering the influence of the weak bedding plane and longitudinal stress difference, the interlayer stress difference 3–4 MPa in the study area can control the fracture height within the zone of stress barrier, and the fracture height is less than 40 m. If the influence of the weak bedding plane is not considered, the simulation result of fracture height is obviously higher. Although the opening of high-density bedding fractures increases the complexity of hydraulic fractures, it significantly limited the propagation of fracture height. By reducing the number of clusters, increasing the injection rate, and increasing the volume and proportion of high-viscosity fracturing fluid in the pad stage, the restriction on fracture height due to the bedding plane and vertical stress difference can be reduced, and the longitudinal propagation of fractures can be promoted. The fracture propagation model was used to simulate one stage of Well A in Fuling shale gas field, and the simulation results were consistent with the micro-seismic monitoring results.

以Fu陵页岩气田焦石坝背斜的主要区域为研究对象，进行了实验室岩石力学实验和直接剪切实验，阐明了层理丰富的岩石样品的力学各向异性特征和参数。根据实验结果，通过离散元方法建立了考虑机械各向异性，弱层理面和垂直应力差的目标储层3D裂缝扩展模型，以分析不同层理密度，力学性能，水力裂缝的水力裂缝分布规律。压裂工程参数（包括射孔团簇，注入速率和压裂液粘度）。研究结果表明，考虑到弱顺层面和纵向应力差的影响，研究区域的层间应力差为3-4 MPa可以控制应力屏障区内的断裂高度，且断裂高度小于40米 如果不考虑弱层理面的影响，则裂缝高度的模拟结果显然更高。尽管高密度顺层裂缝的开放增加了水力裂缝的复杂性，但它极大地限制了裂缝高度的传播。通过减少簇的数量，增加注入速率以及增加垫阶段的高粘度压裂液的体积和比例，可以减少由于层理面和垂直应力差而对裂缝高度的限制，并且可以促进裂缝的纵向扩展。裂缝扩展模型用于Fu陵页岩气田A井一期模拟，模拟结果与微震监测结果吻合。