修正衰减曲线法在低渗气藏动态分析中的应用

摘要：压力是气井和气藏生产动态分析的灵魂，很多动态分析方法都与压力有着直接的联系。然而，由于致密低渗透气藏产量低、压力下降快、关井压力恢复缓慢等生产特征，以及生产方式的限制，在生产过程中很难获得气井或气藏地层压力资料。压降法、产量不稳定分析法和产量递减曲线分析方法是气藏常用的气井生产动态分析方法，但由于地层压力资料缺乏，压降法和产量不稳定分析法也都受到了很大的限制，在衰减递减曲线分析方法的基础上对其进行修正，摆脱了压力资料的限制，通过和压降法对比分析，验证了修正衰减曲线分析方法在生产动态分析中的可靠性。

Correction for Attenuation Curve Method in Low Permeability Gas Reservoir Dynamic Analysis Application

The pressure is the soul of gas reservoir/well production performance analysis.Many dynamic analysis method has a direct link with pressure.However,it is very difficult to obtain the bottom hole flow pressure and formation pressure data of tight and low permeability gas reservoir in the production process,due to the low yield,quick decrease in the formation pressure,slow increases in the shut-in pressure and constraints of the mode of production.The pressure drop method,production uncert aintyanalysis and production decline curve analysis method are generally used to produce gas reservoir dynamic analysis,but due to the lack of pressure data,the pressure drop method and production uncertainty analysis meet very big limitation.Based on the modified attenuated decline curve analysis method,we got rid of the limitation of pressure data.It is also verified to be reliable by comparisons with pressure drop method.