The complex nature of fracture generation and distribution in the development of fractured reservoirs presents challenges for the exploitation of low permeability oil fields. Gas injection is a commonly employed method to enhance oil recovery; however, the proliferation of fractures can lead to gas breakthrough, reducing the sweep range and overall effectiveness of gas drive. Therefore, this paper investigates the phenomenon of gas channeling within reservoirs. In this study, microfluidic technology is utilized to conduct gas flooding experiments within a matrix fracture model. The residual oil saturation at various injection times is observed, with a comparative analysis conducted on the impact of gas injection speed and crude oil viscosity on gas channeling. Furthermore, a single fracture model is used to carry out additional gas channeling experiments, comparing and analyzing changes in starting pressure and time under different parameters such as gas injection speed, crude oil viscosity, and fracture aperture. The findings reveal that after gas channeling in the matrix-fracture model, there is no significant alteration in residual oil saturation. Optimal recovery degree is achieved with a 1.0 μl/min gas injection speed; both excessively fast or slow speeds diminish displacement effectiveness. High crude oil viscosity impedes effective displacement by injected gases leading to continuous reduction in oil recovery. Additionally during the process of gas channeling, starting pressure increases with higher injection speeds and crude oil viscosities while decreasing with increased fracture aperture. This research provides valuable insights into suitable injection parameters for field application.