有水气藏水侵特征分析方法现状及未来发展方向OA

During the development process,water-bearing gas reservoirs may suffer water influx,leading to reduced gas well productivity or even well shutdown,significantly lowering the reservoir's recovery rate.To provide reference for subsequent studies and engineering applications,this paper systematically investigates the research advances of existing water influx characterization methods.According to literature review and technology comparison,this paper critically evaluates the applicability and limitations of hydrochemical analysis,production performance diagnosis,pressure response interpretation,development logging and testing techniques,and data-driven methods in identifying water influx types,assessing aquifer activity,and tracing water influx pathways.The findings indicate that:(i)hydrochemical analysis effectively distinguishes different water sources but suffers from response lag;(ii)the production dynamic analysis method is simple and intuitive,but it is difficult to quantitatively characterize the intensity of water invasion;(iii)pressure response interpretation enables dynamic monitoring and quantitative assessment of water influx impacts,though some models fail to adequately account for mechanisms such as water-blocking gas;(iv)development logging and testing techniques offer high resolution and strong specificity but entail high operational costs;and(v)data-driven method demonstrates strong potential in forecasting water production trends,although their performance is highly dependent on data quality and computational resources.It is concluded that due to the inherent limitations of individual methods,an integrated multi-method approach is essential in practice to enhance the accuracy and reliability of water influx identification and evaluation.Future efforts should focus on developing an early-warning system for water influx that synergistically combines physical constraints with data-driven techniques,thereby shifting from reactive,lagging responses to proactive,early-stage prevention and control.