Application and Practice of Well Testing Interpretation in Reservoir Injection and Production Adjustment

Well testing technology serves as a fundamental approach for reservoir characterization, evaluation, and dynamic analysis, playing a vital role in the development of low-permeability reservoirs. To apply well test data effectively in dynamic analysis, it is essential for field engineers to accurately interpret dual-logarithmic pressure and derivative curves. Based on these interpretations, comprehensive monitoring programs can be established, enabling the effective use of well test results for production adjustment and providing strong technical support for efficient oilfield development. In this study, interpretation standards and methodologies for well testing in ultra-low-permeability reservoirs were developed by integrating dual-logarithmic curve analysis with an assessment of the impact of water injection on reservoir microfractures. These methods were further applied to injection–production regulation in low-permeability reservoirs. Typical field cases were analyzed to verify the reliability and precision of the proposed approach. The results indicate that the water-injection well test interpretation method offers a dependable early-warning capability and demonstrates strong applicability in optimizing injection–production management and enhancing recovery potential in low-permeability reservoirs.