Research and application of liquid—carrying model for low permeability and water production gas reservoir
Online published: 2013-10-08
Accurate prediction of the critical liquid-carrying gas flow is very important to optimize work systems and exclude wellbore effusion for gas well. The currently used liquid-carrying models generally fail to comprehensively consider the influence of liquid droplet deformation and size for the critical liquid-carrying gas flow, and critical Weber number is taken as a given value or critical liquid-carrying gas flow has nothing to do with the Weber number, which is certainly lack of theory. Considering the droplet size and droplet deformation characteristics, and combined with the critical Weber number algorithm of Tatterson and Azzopdiar, based on the liquid droplet partial force equilibrium theory and energy conservation principle, we deduced a new model to predict the critical liquid-carrying gas flow. The new model coefficient varies from 1.92 to 5.3, which becomes larger with the pressure gradually, and it is to make up a defect on a given value of the coefficients of the currently used liquid-carrying models. Field application shows that the predicted effusion status of the vertical wells by this new model is agreed with actual effusion status, which can meet the production requirements.
ZHOU Ying , TANGHai , LU Dongliang , ZHAOChunming , LIAOXingwu . Research and application of liquid—carrying model for low permeability and water production gas reservoir[J]. Lithologic Reservoirs, 2013 , 25(4) : 123 -128 . DOI: 10.3969/j.issn.1673-8926.2013.04.024
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