Abstract: After a long period development,Shaxi E31 reservoir met some prominent problems,such as high injectors-producers ratio,low recovery degree,low natural production of single well,fast decline and poor production results.In order to improve development effect,enhance the producing degree of difficult recoverable reserves,based on full argument of reservoir development potential,through the fine structure interpretation,reservoir characteristics research,the second logging interpretation and remaining oil distribution,a comprehensive adjustment program combined with infill adjustment,oil wells transferring to water wells,and oil and water wells measurements has been proposed.Through field application,good development effect has been achieved.Compared with the calibration recovery,the predicted ultimate recovery can increase 2.3 percentage points.