@Article{fdmp.2020.011051,
AUTHOR = {Shan Jin, Xiaohong Bai, Wei Luo, Li Li, Ruiquan Liao},
TITLE = {Improving Existing Drainage and Gas Recovery Technologies: An Experimental Study on the Wellbore Flow in a Horizontal Well},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {16},
YEAR = {2020},
NUMBER = {6},
PAGES = {1229--1242},
URL = {http://www.techscience.com/fdmp/v16n6/40846},
ISSN = {1555-2578},
ABSTRACT = {With the increasing number of horizontal wells with low pressure, low
yield, and water production, the phenomenon of water and liquid accumulation in
gas wells is becoming progressively more serious. In order to fix these issues, it is
necessary to improve existing drainage and gas recovery technologies, increase
the fluid carrying capacity of these wells, and ensure that the bottom-hole airflow
has enough energy to transport the liquid to the wellhead. Among the many techniques of drainage and gas recovery, the gas lift has recently become a popular
method. In the present study, through the simulation of the entire horizontal well,
the flow regularity of the whole wellbore during the lift of low-pressure gas has
been analyzed. The pressure distribution, liquid holdup rate, flow pattern, and
energy loss (including gravity loss and friction loss) have been determined using
the Beggs-brill approach. It has been found that the total pressure drop of the wellbore decreases first and increases gradually after reaching a minimum value when
gas extraction is carried out via gas lift. Based on the analysis of the influence of
the injection volume on wellbore pressure drop and the influence of flow pattern
on the lifting efficiency, the optimal gas-lift injection parameters have been determined by taking the minimum pressure loss of wellbore as the judgment criterion.},
DOI = {10.32604/fdmp.2020.011051}
}