Study On The Calibration Method Of Theoretical Recovery Rate Of Tight Gas Reservoir

The recovery rate of accurate calibration is an important basis and guarantee the efficient development of gas fields,but the tight sandstone gas reservoir permeability and seepage law of the complex,the existing recovery calibration method is difficult to adapt to the gas seepage characteristics,so it is urgent to set up to consider the recovery rate calibration method of microscopic reservoir seepage and macroscopic properties.Based on the analysis of influence factors of tight gas reservoir recovery,were studied and the parameters influencing the effect of recovery from the two aspects of seepage characteristics and reservoir property;then,based on the characteristics of seepage,considering calibration recovery should be the material balance method and starting pressure gradient force sensitive effect and the production method;secondly,using the fuzzy comprehensive analysis method,establish the tight gas reservoir parameters influence the reservoir recovery method based on calibration;finally,by Atake Suji,Su 14,Su 75 and Su Dong tight gas reservoir as an example,through the analysis of the example that the three method is practical,and the advantages and disadvantages of each methods with applicability conditions are given.The establishment of the calibration method for the recovery of tight gas reservoirs provides a more practical method for accurately predicting the recovery of tight gas reservoirs.