Using Transient Flow Modeling to Diagnose Liquid Loading

Summary A lot of work has done on the onset of liquid loading. The fundamental understanding about the phenomena associated with the liquid loading unsatisfactory. Four kinds of modeling approaches have introduced to characterize the liquid loading in gas wells: empirical models, Phenomenological models, the two-fluid model and the drift-flux model. The objective of this research is to observe the post effect of liquid loading, particularly flow regime transitions and hold up due to liquid loading by considering two-fluid approach. In transition wellbore modelling techniques, OLGA uses Single Forchheimer equation in the background for calculating the inflow performance of a well. Despite the availability of wide range of two-fluid modelling techniques, it is very difficult to capture the flow regime transition completely. Dynamic modelling by OLGA captured the flow regime transition from annular to slug, slug to bubble flow. OLGA is capable of capturing the bottomhole hold up which is important to understand the seriousness of the liquid loading. It is incapable of capturing the churn flow. Furthermore, it can be used while selecting the Deliquification technique for any liquid loaded well. It is quiet reliable as it corresponds to the production rate, wellhead pressure and reservoir pressure for the production period.