修正等时试井在气藏动态分析中的应用

Application of Modified Isochronal Testing to Performance Analysis of Gas Reservoirs

修正等时试井的传统应用 ,主要确定气井当前无阻流量 ,进而制定合理工作制度。实际上 ,还可以根据延续生产动态资料 ,分析气井生产动态特征 ,评价稳产水平和能力 ;根据压降、压力恢复曲线解释气层物性参数和气藏工程参数 ,分析储层类型、非均质性和边界特征 ,初步计算动态储量等。修正等时试井成果的广泛推广应用 ,丰富了气藏动态分析内容 ,加深了对气藏的认识和评价 ,提高了动态分析水平。

Conventional application of modified isochronal testing is mainly to determine the current open flow capacity of the gas well,and thus making a reasonable working system.In fact,it can be used to analyze the dynamic characteristics of production of the well,and to evaluate the level and production rate-maintenance capability,according to the continuous production performance data,to interpret parameters of physical properties of the gas reservoir,and reservoir engineering parameters,to analyze the reservoir types,heterogeneity and marginal characteristics,and to calculate preliminarily the dynamic reserves of gas ,on the basis of pressure draw-down and build-up curves.The spreading and using of the results of modified isochronal testing enrich the content of gas reservoir performance analysis,and make us deepen the understanding and evaluation of the gas reservoirs.Thereby the level of performance analysis has been raised.