明确缝内多级暂堵转向力学机理和主控因素对优化缝内暂堵方案至关重要。采用有限元方法建立了缝内多级暂堵转向裂缝扩展模型，研究岩石杨氏模量、抗拉强度、地应力差和注入排量等因素对缝内多级暂堵裂缝转向扩展的影响规律。结果表明：岩石杨氏模量从22 GPa增大到30 GPa时，天然裂缝被激活的时间缩短了25.6%，人工裂缝宽度从21.86 mm降低到17.71 mm，降低幅度为18.9%；天然裂缝抗拉强度从2.5 MPa增加到3.5 MPa时，天然裂缝被激活的时间增加了3.8%，人工裂缝宽度从28.28 mm增加到29.93 mm，增加幅度为5.8%；地应力差从7 MPa增加到9 MPa时，天然裂缝被激活的时间增加了47.4%，人工裂缝宽度从22.66 mm增加到29.38 mm，增加幅度为29.7%；注入排量从0.000 5 m²/s增加到0.001 5 m²／s时，天然裂缝被激活的时间缩短了75.2%，人工裂缝宽度从28.64 mm增加到41.46 mm，增加幅度为44.8%。研究成果可为缝内多级暂堵转向压裂优化与效果评价提供一定的理论指导。

It is very important to clarify the diversion mechanism and main control factors of multi-stage temporary plugging in the seam to optimize the temporary plugging scheme in the seam. The finite element method was used to establish a multi-stage temporary plugging diversion fracture propagation model in the fracture, and the influence of Young's modulus, tensile strength, in-situ stress difference, and injection displacement on the diversion propagation of multi-stage temporary plugging fracture in the fracture was studied. The results show that when Young's modulus of rock increases from 22 GPa to 30 GPa, the activation time of natural fractures is shortened by 25.6%, and the fracture width is reduced from 21.86 mm to 17.71 mm, with a decrease of 18.9%. When the tensile strength of natural fractures increases from 2.5 MPa to 3.5 MPa, the activation time of natural fractures increases by 3.8%, and the fracture width increases from 28.28 mm to 29.93 mm, an increase of 5.8%. When the stress difference increases from 7 MPa to 9 MPa, the activation time of natural fractures increases by 47.4%, and the fracture width increases from 22.66 mm to 29.38 mm, an increase of 29.7%. When the injection displacement increases from 0.000 5 m²/s to 0.001 5 m²/s, the activation time of natural fractures is shortened by 75.2%, and the fracture width increases from 28.64 mm to 41.46 mm, an increase of 44.8%. The research results can provide some theoretical guidance for the optimization and effect evaluation of multi-stage temporary plugging diversion fracturing in fractures.