The conventional development effect evaluation after flow field adjustment is usually based on the numerical simulation results, commonly utilizing the cumulative oil production (COP) index for evaluation. However, this approach of calling numerical simulation until the end of development is time-consuming. The comprehensive reservoir development history is typically assessed from a macroscopic standpoint, hindering a swift evaluation of the efficacy of adapted measures. Therefore, a rapid evaluation method based on the flow field potential coefficient (FPC) is introduced. This method integrates reservoir numerical simulation results and factors impacting flow field distribution. By extracting the instantaneous attribute characteristics of the flow field, it creates a comprehensive index. This index considering the potential of the flow field to influence remaining oil, the abundance of remaining reserves, and the fluid’s flow state. This coefficient can reflect the adaptability of reservoir flow field during development. The development effects of well location adjustments and injection-production parameter adjustment schemes in two-dimensional and three-dimensional heterogeneous reservoirs is assessed using COP and FPC, respectively. Findings indicate consistent dynamics between the evaluation index (FPC) and development index (COP). In addition, a positive correlation exists between the instantaneous flow field potential coefficient (IFPC) and the final COP. The reason why IFPC can reduce the time-dependency of development effect evaluation is that it only needs to call the streamline simulator to simulate the first instantaneous time-step after flow field adjustment, and then the long-term effect of the adjustment scheme can be evaluated. Therefore, curtailing the runtime of numerical simulations, facilitates rapid evaluations of development effects, resolving the time-consuming task of utilizing numerical values to assess the impact of simulation results on development effects. Adopting the new approach enables rapid and accurate assessment of the development effect post-flow field adjustments. Simultaneously, it also provides an objective function for swiftly optimizing injection and production adjustment schemes, offering crucial guidance for efficient-ly tapping into the potential of mature oilfields.