Abstract:

Abstract：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，slowincreasesintheshut-inpressureandconstraintsofthemodeofproduction．Thepressuredropmethod，production
uncertaintyanalysisandproductiondeclinecurveanalysismethodaregenerallyusedtoproducegasreservoirdynamicanalysis，
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

Key words: Key words：tight and low permeability, production performance, attenuation decrement