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天然气藏开发过程中的气井产水现象是广泛存在的,如何及时、准确地识别气井产出水的来源,对于认识气藏气水活动规律、确定合理的开发方式和应对措施以及提高开发效果具有重要的现实意义。通过对气井产水动态的研究,将产出水划分为气层内部水、气层外部水以及工业用水,并归纳总结出不同产水来源下的生产特征。详尽地阐述了中高渗与低渗气藏产出水来源以及出水机理,同时结合前人的研究成果,形成了6种气井产水来源的判别方法,其中,首次提出了产出水地层条件下体积分数的判别方法,最后给出了这些方法的应用实例。
Gas production in the process of natural gas reservoir development is widespread. How to identify the source of gas well production timely and accurately is of great significance for understanding the rules of gas and water activities in gas reservoirs, determining reasonable development methods and countermeasures, and improving development effects Important practical significance. Through the study on the dynamic of water production in gas wells, the output water is divided into the water inside the gas layer, the external water layer of the gas layer and the industrial water, and the production features under different water sources are summarized. Elaborated the medium and high permeability and low permeability gas reservoir source of water and water out of the mechanism, combined with previous research results, the formation of six gas well water source discrimination method, which, for the first time put forward the production of water strata conditions Volume fraction of the discriminant method, and finally gives examples of the application of these methods.