气井产量递减规律分析方法对比分析

CORRELATION OF PRODUCTION DECLINE FOR GAS WELLS

详细介绍了预测气井产量递减的3种常用方法(Arps递减曲线法、Fetkovich递减曲线法和Blasingame递减曲线法),并对其应用范围、优缺点进行对比,能更科学有效地利用现有方法进行产量递减分析。通过对G8井、G10井的生产数据进行递减分析,获得了两口气井的递减参数,应用效果表明,对于低渗气井或不便长时间关井的气井来说,应用Fetkovich递减曲线法和Blasingame递减曲线法进行地层参数预测更为可行。

This paper presents three common methods to predict the production decline of gas wells including classical Arps decline curve,Fetkovich decline curve and Blasingame decline curve.And it also contrasts their application and advantages / disadvantages in order to analyze production decline effectively.For well G8 and well G10,the decline of production data was analyzed and decline parameters were obtained.Results show that both Fetkovich and Blasingame decline curves are more available for predicting formation parameters for the low-permeability gas wells or some gas wells which can't be shut-in for a long time.