Li and Turner Modified model for Predicting Liquid Loading in Gas Wells

Princewill Maduabuchi Ikpeka, Michael Onyinyechukwu Okolo

    Research output: Contribution to journalArticle

    Abstract

    Liquid loading of gas wells causes production difficulty and reduces ultimate recovery from these wells. Several authors proposed different models to predict the onset of liquid loading in gas wells, but the results from the models
    often show discrepancies. Turner’s et al. (J Pet Technol, 1969) critical model was developed based on the assumption that the droplet is a sphere and remains spherical all through the entire wellbore. On the other hand, Li’s model was developed based on the assumption the liquid droplets are flat in shape and remains same all through the wellbore. However, it is a well-known fact that the droplet alternates between spherical and flat during production operation. Invariably, the Turner’s model and the Li’s model would not be able to predict correctly the critical rate required to lift that droplet which is because the droplet deformation was not taken into account during the development of the models.
    In this work, a new improved model is developed and incorporated into Ms-Excel program to predict liquid loading in gas wells. In the new model, a deformation coefficient “C” is introduced to cater for the deformation of the liquid droplet along the wellbore and in turn be able to predict correctly the critical rate when the droplet varies from the spherical shape to the flat shape. Results from the analysis carried out revealed 35% error on from Turner’s model, 26% error on Li’s model, whereas the new model yielded 20% error. The new developed software and model proved to be more accurate in predicting onset of liquid loading.
    Original languageEnglish
    Pages (from-to)1971-1993
    Number of pages23
    JournalJournal of Petroleum Exploration and Production Technology
    Volume9
    Issue number3
    DOIs
    Publication statusPublished - 27 Nov 2018

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