Presenters
N.J. Isto, Shell Oil Co.
This paper presents a basic method for designing and analyzing continuous and intermittent flow gas lift installations by combining mathematical and graphical design techniques. By expressing the graphical presentations of well performance in the form a pressure-depth diagram, one standard procedure can be employed to design continuous and intermittent flow gas lift installations using any basic type of gas lift valve. This approach to gas lift design presents a complete graphical picture of the pressure conditions that are encountered in the wellbore during the "kick-off" and producing phases of gas lift thus providing the designer with a better understanding of gas lift operation.