An experimental study of liquid unloading in the curve section of horizontal gas wells

Liquid unloading is a very common and important issue in horizontal gas wells, and the presence of curve sections increases the complexity of the phenomenon and its study. Liquid loading in a gas well will sharply reduce production, therefore, the liquid-unloading onset of different curved pipes is...

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Autores principales:	Shi Shuzhe, Han Guoqing, Wu Bohong, Xu Kangtai, Li Zhun, Sun Ke
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	Chemical technology TP1-1185 Energy industries. Energy policy. Fuel trade HD9502-9502.5
Acceso en línea:	https://doaj.org/article/0c99396f58fd4ec9804eb45dada47ab2
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spelling	oai:doaj.org-article:0c99396f58fd4ec9804eb45dada47ab22021-11-08T15:21:30ZAn experimental study of liquid unloading in the curve section of horizontal gas wells1294-44751953-818910.2516/ogst/2021051https://doaj.org/article/0c99396f58fd4ec9804eb45dada47ab22021-01-01T00:00:00Zhttps://ogst.ifpenergiesnouvelles.fr/articles/ogst/full_html/2021/01/ogst210084/ogst210084.htmlhttps://doaj.org/toc/1294-4475https://doaj.org/toc/1953-8189Liquid unloading is a very common and important issue in horizontal gas wells, and the presence of curve sections increases the complexity of the phenomenon and its study. Liquid loading in a gas well will sharply reduce production, therefore, the liquid-unloading onset of different curved pipes is essential to gas production. In this work, liquid-unloading onset experiments were conducted in curved pipes with different curvatures. Then, the critical gas velocity VsgCR can be determined according to the measured pressure gradients, liquid holdup, and liquid film reversal. This work analyzes the factors which will lead to the liquid unloading and explores the trend of the pipe curvature’s influence on the liquid unloading under laboratory conditions. The experimental results show that the critical gas velocity rises with the increase of pipe curvature, the increase is mainly due to the centrifugal force. The present work also compares the predicted results of the OLGA model and Beggs–Brill model with experimental data. The comparison results indicate that both models fit relatively well to the experimental data at the low superficial gas velocity, and both models have poor performance at high superficial gas velocity. The OLGA model fits the experimental data better than the Beggs–Brill model at high superficial gas velocity. The error analysis shows that most of the predicted data is not in good agreement with experimental data. Some errors between experimental data and calculation results are out of the range of 50%.Shi ShuzheHan GuoqingWu BohongXu KangtaiLi ZhunSun KeEDP SciencesarticleChemical technologyTP1-1185Energy industries. Energy policy. Fuel tradeHD9502-9502.5ENFROil & Gas Science and Technology, Vol 76, p 69 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	Chemical technology TP1-1185 Energy industries. Energy policy. Fuel trade HD9502-9502.5
spellingShingle	Chemical technology TP1-1185 Energy industries. Energy policy. Fuel trade HD9502-9502.5 Shi Shuzhe Han Guoqing Wu Bohong Xu Kangtai Li Zhun Sun Ke An experimental study of liquid unloading in the curve section of horizontal gas wells
description	Liquid unloading is a very common and important issue in horizontal gas wells, and the presence of curve sections increases the complexity of the phenomenon and its study. Liquid loading in a gas well will sharply reduce production, therefore, the liquid-unloading onset of different curved pipes is essential to gas production. In this work, liquid-unloading onset experiments were conducted in curved pipes with different curvatures. Then, the critical gas velocity VsgCR can be determined according to the measured pressure gradients, liquid holdup, and liquid film reversal. This work analyzes the factors which will lead to the liquid unloading and explores the trend of the pipe curvature’s influence on the liquid unloading under laboratory conditions. The experimental results show that the critical gas velocity rises with the increase of pipe curvature, the increase is mainly due to the centrifugal force. The present work also compares the predicted results of the OLGA model and Beggs–Brill model with experimental data. The comparison results indicate that both models fit relatively well to the experimental data at the low superficial gas velocity, and both models have poor performance at high superficial gas velocity. The OLGA model fits the experimental data better than the Beggs–Brill model at high superficial gas velocity. The error analysis shows that most of the predicted data is not in good agreement with experimental data. Some errors between experimental data and calculation results are out of the range of 50%.
format	article
author	Shi Shuzhe Han Guoqing Wu Bohong Xu Kangtai Li Zhun Sun Ke
author_facet	Shi Shuzhe Han Guoqing Wu Bohong Xu Kangtai Li Zhun Sun Ke
author_sort	Shi Shuzhe
title	An experimental study of liquid unloading in the curve section of horizontal gas wells
title_short	An experimental study of liquid unloading in the curve section of horizontal gas wells
title_full	An experimental study of liquid unloading in the curve section of horizontal gas wells
title_fullStr	An experimental study of liquid unloading in the curve section of horizontal gas wells
title_full_unstemmed	An experimental study of liquid unloading in the curve section of horizontal gas wells
title_sort	experimental study of liquid unloading in the curve section of horizontal gas wells
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/0c99396f58fd4ec9804eb45dada47ab2
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An experimental study of liquid unloading in the curve section of horizontal gas wells

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