The New Methods for Non-Steady Productivity Prediction of Condensate Gas Reservoir and the Application Evaluation

In view of the existing shortcomings of the analysis methods for the production system of conventional condensate gas well, the new method that adopts the non-steady gas reservoir seepage and the wellbore coupling has been proposed in this paper, in other words, the gas nozzle control, the wellbore flow and the reservoir seepage have been considered as the coupling entirety; the traditional nodal analysis has been combined with the well test analysis of non-steady seepage; the new production system analysis methods have been employed to discuss the characteristics of gas reservoir seepage, wellbore flow and gas reservoir boundary; at the same time, the changing trends of indicators in the development process have been also analyzed. Afterwards, the coordination state and the changes of parameters of the production system can be predicted in different production methods and different times. And the better results can be obtained through the application evaluation of YK1.