Numerical simulation on gas production from inclined layered methane hydrate reservoirs in the Nankai Trough: A case study

Natural gas hydrate is generally disseminated in tilted sediments. The inclination of hydrate reservoirs significantly affects the fluid migration behaviour and production potential. However, most of the current simulations ideally assume that the hydrate reservoir is horizontally distributed; resul...

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Autores principales:	Peixiao Mao, Jiaxin Sun, Fulong Ning, Lin Chen, Yizhao Wan, Gaowei Hu, Nengyou Wu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Gas hydrate Inclined layered hydrate reservoir Horizontal well Depressurization combined with thermal stimulation Numerical simulation Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/c67eeb7c3f6a456e98abc4822cc1bfb2
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spelling	oai:doaj.org-article:c67eeb7c3f6a456e98abc4822cc1bfb22021-11-28T04:33:36ZNumerical simulation on gas production from inclined layered methane hydrate reservoirs in the Nankai Trough: A case study2352-484710.1016/j.egyr.2021.03.032https://doaj.org/article/c67eeb7c3f6a456e98abc4822cc1bfb22021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2352484721002018https://doaj.org/toc/2352-4847Natural gas hydrate is generally disseminated in tilted sediments. The inclination of hydrate reservoirs significantly affects the fluid migration behaviour and production potential. However, most of the current simulations ideally assume that the hydrate reservoir is horizontally distributed; resulting in the effect of the formation dip on the well deployment and corresponding gas production remains unclear. Here, we implement a real inclined alternating sand–clay hydrate reservoir model based on geological data from the Nankai Trough, Japan, to simulate the production performance of a single horizontal well and dual horizontal wells. Results show that the gas and water productions are enhanced when a single horizontal production well is deployed in the structural low of the reservoir. The gas and water production performance in upper sandy reservoir and the water extraction in the middle muddy reservoir are sensitive to the layout of the production wells, which can cause the daily difference is over 6%. The gas-to-water ratio is independent from the structural deployment positions of the horizontal wells in the same inclined layer. Compared to the single depressurization method, placing a horizontal thermal injection well in the structural high of the upper inclined sandy reservoir and a horizontal production well in the structural low of the same formation improves the gas recovery efficiency nearly twice, which is recommended for production enhancement. Our findings are useful for achieving effective and economic gas recovery from natural inclined layered hydrate reservoirs.Peixiao MaoJiaxin SunFulong NingLin ChenYizhao WanGaowei HuNengyou WuElsevierarticleGas hydrateInclined layered hydrate reservoirHorizontal wellDepressurization combined with thermal stimulationNumerical simulationElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENEnergy Reports, Vol 7, Iss , Pp 8608-8623 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Gas hydrate Inclined layered hydrate reservoir Horizontal well Depressurization combined with thermal stimulation Numerical simulation Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Gas hydrate Inclined layered hydrate reservoir Horizontal well Depressurization combined with thermal stimulation Numerical simulation Electrical engineering. Electronics. Nuclear engineering TK1-9971 Peixiao Mao Jiaxin Sun Fulong Ning Lin Chen Yizhao Wan Gaowei Hu Nengyou Wu Numerical simulation on gas production from inclined layered methane hydrate reservoirs in the Nankai Trough: A case study
description	Natural gas hydrate is generally disseminated in tilted sediments. The inclination of hydrate reservoirs significantly affects the fluid migration behaviour and production potential. However, most of the current simulations ideally assume that the hydrate reservoir is horizontally distributed; resulting in the effect of the formation dip on the well deployment and corresponding gas production remains unclear. Here, we implement a real inclined alternating sand–clay hydrate reservoir model based on geological data from the Nankai Trough, Japan, to simulate the production performance of a single horizontal well and dual horizontal wells. Results show that the gas and water productions are enhanced when a single horizontal production well is deployed in the structural low of the reservoir. The gas and water production performance in upper sandy reservoir and the water extraction in the middle muddy reservoir are sensitive to the layout of the production wells, which can cause the daily difference is over 6%. The gas-to-water ratio is independent from the structural deployment positions of the horizontal wells in the same inclined layer. Compared to the single depressurization method, placing a horizontal thermal injection well in the structural high of the upper inclined sandy reservoir and a horizontal production well in the structural low of the same formation improves the gas recovery efficiency nearly twice, which is recommended for production enhancement. Our findings are useful for achieving effective and economic gas recovery from natural inclined layered hydrate reservoirs.
format	article
author	Peixiao Mao Jiaxin Sun Fulong Ning Lin Chen Yizhao Wan Gaowei Hu Nengyou Wu
author_facet	Peixiao Mao Jiaxin Sun Fulong Ning Lin Chen Yizhao Wan Gaowei Hu Nengyou Wu
author_sort	Peixiao Mao
title	Numerical simulation on gas production from inclined layered methane hydrate reservoirs in the Nankai Trough: A case study
title_short	Numerical simulation on gas production from inclined layered methane hydrate reservoirs in the Nankai Trough: A case study
title_full	Numerical simulation on gas production from inclined layered methane hydrate reservoirs in the Nankai Trough: A case study
title_fullStr	Numerical simulation on gas production from inclined layered methane hydrate reservoirs in the Nankai Trough: A case study
title_full_unstemmed	Numerical simulation on gas production from inclined layered methane hydrate reservoirs in the Nankai Trough: A case study
title_sort	numerical simulation on gas production from inclined layered methane hydrate reservoirs in the nankai trough: a case study
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/c67eeb7c3f6a456e98abc4822cc1bfb2
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Numerical simulation on gas production from inclined layered methane hydrate reservoirs in the Nankai Trough: A case study

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