Analysis and Application of Formation Pressure Reducing Method in Deep Gas Well

Aiming at the problem that pressure gauge of deep gas wells is not put in the middle part of gas reservoirs and recorded pressure has error with real formation pressure,this paper performs analysis on pressure reducing method for deep gas wells.It uses integral iteration method to reduce pressure for deep gas well data without pressure gauge put into middle part of gas reservoirs since 2000.In order to verify accuracy of theoretical calculation, it uses well head oil pressure data which is recorded in the process of deep gas well testing to reduce the pressure in the depth of pressure gauge,and compares the real pressure measured by pressure gauge,determines the application range of this method,and reduces static pressure in the middle part of gas reservoirs for deep gas wells which has better conformity between calculated pressure and measure pressure.