Effect of Drilling Fluid Invasion on Natural Gas Hydrate Near-Well Reservoirs Drilling in a Horizontal Well

Horizontal wells can significantly improve the gas production and are expected to be an efficient exploitation method for the industrialization of natural gas hydrates (NGHs) in the future. However, the near-wellbore hydrate is highly prone to decomposition during the drilling process, owing to the...

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Autores principales:	Qibing Wang, Ren Wang, Jiaxin Sun, Jinsheng Sun, Cheng Lu, Kaihe Lv, Jintang Wang, Jianlong Wang, Jie Yang, Yuanzhi Qu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	marine natural gas hydrate horizontal well drilling drilling fluid invasion near-wellbore drilling mud property reservoir response Technology T
Acceso en línea:	https://doaj.org/article/6735c806845d4085b7309a808edef01c
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id	oai:doaj.org-article:6735c806845d4085b7309a808edef01c
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spelling	oai:doaj.org-article:6735c806845d4085b7309a808edef01c2021-11-11T15:52:49ZEffect of Drilling Fluid Invasion on Natural Gas Hydrate Near-Well Reservoirs Drilling in a Horizontal Well10.3390/en142170751996-1073https://doaj.org/article/6735c806845d4085b7309a808edef01c2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7075https://doaj.org/toc/1996-1073Horizontal wells can significantly improve the gas production and are expected to be an efficient exploitation method for the industrialization of natural gas hydrates (NGHs) in the future. However, the near-wellbore hydrate is highly prone to decomposition during the drilling process, owing to the disturbance aroused by the factors such as the drilling fluid temperature, pressure, and salinity. These issues can result in the engineering accidents such as bit sticking and wellbore instability, which are required for further investigations. This paper studies the characteristics of drilling fluid invasion into the marine NGH reservoir with varied drilling fluid parameters via numerical simulation. The effects of the drilling fluid parameters on the decomposition behavior of near-wellbore hydrates are presented. The simulating results show that the adjustments of drilling fluid density within the mud safety window have limited effects on the NGH decomposition, meanwhile the hydrates reservoir is most sensitive to the drilling fluid temperature variation. If the drilling fluid temperature grows considerably due to improper control, the range of the hydrates decomposition around the horizontal well tends to expand, which then aggravates wellbore instability. When the drilling fluid salinity varies in the range of 3.5–7.5%, the increase in the ion concentration speeds up the hydrate decomposition, which is adverse to maintaining wellbore stability.Qibing WangRen WangJiaxin SunJinsheng SunCheng LuKaihe LvJintang WangJianlong WangJie YangYuanzhi QuMDPI AGarticlemarine natural gas hydratehorizontal well drillingdrilling fluid invasionnear-wellboredrilling mud propertyreservoir responseTechnologyTENEnergies, Vol 14, Iss 7075, p 7075 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	marine natural gas hydrate horizontal well drilling drilling fluid invasion near-wellbore drilling mud property reservoir response Technology T
spellingShingle	marine natural gas hydrate horizontal well drilling drilling fluid invasion near-wellbore drilling mud property reservoir response Technology T Qibing Wang Ren Wang Jiaxin Sun Jinsheng Sun Cheng Lu Kaihe Lv Jintang Wang Jianlong Wang Jie Yang Yuanzhi Qu Effect of Drilling Fluid Invasion on Natural Gas Hydrate Near-Well Reservoirs Drilling in a Horizontal Well
description	Horizontal wells can significantly improve the gas production and are expected to be an efficient exploitation method for the industrialization of natural gas hydrates (NGHs) in the future. However, the near-wellbore hydrate is highly prone to decomposition during the drilling process, owing to the disturbance aroused by the factors such as the drilling fluid temperature, pressure, and salinity. These issues can result in the engineering accidents such as bit sticking and wellbore instability, which are required for further investigations. This paper studies the characteristics of drilling fluid invasion into the marine NGH reservoir with varied drilling fluid parameters via numerical simulation. The effects of the drilling fluid parameters on the decomposition behavior of near-wellbore hydrates are presented. The simulating results show that the adjustments of drilling fluid density within the mud safety window have limited effects on the NGH decomposition, meanwhile the hydrates reservoir is most sensitive to the drilling fluid temperature variation. If the drilling fluid temperature grows considerably due to improper control, the range of the hydrates decomposition around the horizontal well tends to expand, which then aggravates wellbore instability. When the drilling fluid salinity varies in the range of 3.5–7.5%, the increase in the ion concentration speeds up the hydrate decomposition, which is adverse to maintaining wellbore stability.
format	article
author	Qibing Wang Ren Wang Jiaxin Sun Jinsheng Sun Cheng Lu Kaihe Lv Jintang Wang Jianlong Wang Jie Yang Yuanzhi Qu
author_facet	Qibing Wang Ren Wang Jiaxin Sun Jinsheng Sun Cheng Lu Kaihe Lv Jintang Wang Jianlong Wang Jie Yang Yuanzhi Qu
author_sort	Qibing Wang
title	Effect of Drilling Fluid Invasion on Natural Gas Hydrate Near-Well Reservoirs Drilling in a Horizontal Well
title_short	Effect of Drilling Fluid Invasion on Natural Gas Hydrate Near-Well Reservoirs Drilling in a Horizontal Well
title_full	Effect of Drilling Fluid Invasion on Natural Gas Hydrate Near-Well Reservoirs Drilling in a Horizontal Well
title_fullStr	Effect of Drilling Fluid Invasion on Natural Gas Hydrate Near-Well Reservoirs Drilling in a Horizontal Well
title_full_unstemmed	Effect of Drilling Fluid Invasion on Natural Gas Hydrate Near-Well Reservoirs Drilling in a Horizontal Well
title_sort	effect of drilling fluid invasion on natural gas hydrate near-well reservoirs drilling in a horizontal well
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/6735c806845d4085b7309a808edef01c
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Effect of Drilling Fluid Invasion on Natural Gas Hydrate Near-Well Reservoirs Drilling in a Horizontal Well

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