Abstract: Using the conventional estimation methods, this paper analyzes the deliverability test data of high-pressure gas wells in Tarim field,discusses the relationship between pseudo-pressure analysis and pressure analysis methods, and develops empirical correlation between open-flow potential estimation in forms of pseudo-pressure and square pressure for high-pressure gas wells, providing a new single-point open-flowpotential equation suitable for both forms. The estimations from many cases show that the results from the equation are accordant with those fromthe productivity test data analyses such as conventional test, isochronal test and modified isochronal test. This equation is practical and reliablefor forecasting the production performance of high-pressure gas wells, and helpful to guarantee the reasonable development of the gas wells.

Key words: Tarim basin, gas well, productivity, equation, pressure, openflow capacity