Abstract: The high-permeability channels are prone to form along the direction of channels with relatively high permeability, and induced fractures are subsequently generated due to reservoir heterogeneity during the water injection development in tight oil reservoirs. However, current well test models cannot explain the inter-well interference data under the condition of water-flooding induced fractures. In this study, a numerical well test model for water-injection induced fractures is established considering the propagation of water-flooding induced fractures. This model is coupled with the stress field model at the fracture tip and accounts for interference from adjacent wells. An unstructured grid and the Discrete Fracture Model (DFM) are employed to characterize dynamic fractures, and the well test type curve analysis chart is plotted, followed by the sensitivity analysis. Results indicate that the higher injection rate makes it easier for induced fractures to initiate and propagate. When induced fractures activate natural fractures multiple times, the pressure derivative curve exhibits a multi-segment linear ascending pattern during the linear flow stage. In the presence of adjacent well interference, a smaller distance between adjacent wells and a larger injection rate result in an earlier decline of the pressure derivative curve. Finally, the applicability and reliability of the proposed method are verified through field cases.