Abstract:

Based on analyzing production system of gas wells,a result is obtained that utilizing the tube smaller than a certain diameter will restrain productivity of gas well during production.On the other hand,according to the analysis of the inflow dynamic curves and tube watercarrying curves,it is also demonstrated that there will be liquidaccumulated in well bore if the tube bigger than a certain diameter.In light of the two viewpoints above,the reasonable diameter of tube can be decided.Thereby,the calculation method that the energy supply and well bore rising abilities are considered in terms of formation energy,but also liquidcarrying ability of well bore,can be achieved and will guide the production of gas wells.With case study,it is pointed out that this method has its broad application prospect.

Key words: gas well, analyses of production system, liquid carrying in well bore, formation energy, tube diameter