TITLE:
A New Model to Predict Average Pressure Difference of Liquid Droplet and Its Application in Gas Well
AUTHORS:
Haiquan Zhong, Jiao Tan, Chi Zhang
KEYWORDS:
Gas Well, Continuous Removal of Liquids, Liquid Droplet, Average Pressure Difference, Deformation, Model Comparison
JOURNAL NAME:
Engineering,
Vol.6 No.8,
July
11,
2014
ABSTRACT:
The distribution of
droplet surface pressure is unevenunder the action of high velocity gas streams in gas wells, and
there exists a pressure difference which leads to droplet
deformation before and after the droplet. Moreover, it affects the critical
liquid carrying rate. The pressure difference prediction model must be determined,
because of the existing one lacking theoretical basis. Based on the droplet
surface pressure distribution in high velocity gas streams, a new model is
established to predict the average differential pressure of droplets. Compared
with the new differential pressure prediction results, the existing pressure
difference prediction results were overvalued by 46.0%. This article also
improves four gas-well critical liquid carrying models using the proposed
pressure difference prediction model, and compares with the original one. The
result indicates that the critical velocity of the original models is
undervalued by 10% or so, due to the overestimate to the pressuredifference. In
addition, comparisons of the improved model with original models show that it is
necessary to consider the adaptability, because the models have significant
differences in results, and different suitability for different well conditions.