The Effects of the Length and Conductivity of Artificial Fracture on Gas Production from a Class 3 Hydrate Reservoir

Natural gas hydrate is considered as a potential energy resource. To develop technologies for the exploitation of natural gas hydrate, several field gas production tests have been carried out in permafrost and continental slope sediments. However, the gas production rates in these tests were still l...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Shilong Shang, Lijuan Gu, Hailong Lu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	numerical simulation artificial fracture gas production hydrate reservoir Technology T
Acceso en línea:	https://doaj.org/article/2d1e406513b542988ffa755495276275
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:2d1e406513b542988ffa755495276275
record_format	dspace
spelling	oai:doaj.org-article:2d1e406513b542988ffa7554952762752021-11-25T17:26:11ZThe Effects of the Length and Conductivity of Artificial Fracture on Gas Production from a Class 3 Hydrate Reservoir10.3390/en142275131996-1073https://doaj.org/article/2d1e406513b542988ffa7554952762752021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7513https://doaj.org/toc/1996-1073Natural gas hydrate is considered as a potential energy resource. To develop technologies for the exploitation of natural gas hydrate, several field gas production tests have been carried out in permafrost and continental slope sediments. However, the gas production rates in these tests were still limited, and the low permeability of the hydrate-bearing sediments is identified as one of the crucial factors. Artificial fracturing is proposed to promote gas production rate by improving reservoir permeability. In this research, numerical studies about the effect of fracture length and fluid conductivity on production performance were carried out on an artificially fractured Class 3 hydrate reservoir (where the single hydrate zone is surrounded by an overlaying and underlying hydrate-free zone), in which the equivalent conductivity method was applied to depict the artificial fracture. The results show that artificial fracture can enhance gas production by offering an extra fluid flow channel for the migration of gas released from hydrate dissociation. The effect of fracture length on production is closely related to the time frame of production, and gas production improvement by enlarging the fracture length is observed after a certain production duration. Through the production process, secondary hydrate formation is absent in the fracture, and the high conductivity in the fracture is maintained. The results indicate that the increase in fracture conductivity has a limited effect on enhancing gas production.Shilong ShangLijuan GuHailong LuMDPI AGarticlenumerical simulationartificial fracturegas productionhydrate reservoirTechnologyTENEnergies, Vol 14, Iss 7513, p 7513 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	numerical simulation artificial fracture gas production hydrate reservoir Technology T
spellingShingle	numerical simulation artificial fracture gas production hydrate reservoir Technology T Shilong Shang Lijuan Gu Hailong Lu The Effects of the Length and Conductivity of Artificial Fracture on Gas Production from a Class 3 Hydrate Reservoir
description	Natural gas hydrate is considered as a potential energy resource. To develop technologies for the exploitation of natural gas hydrate, several field gas production tests have been carried out in permafrost and continental slope sediments. However, the gas production rates in these tests were still limited, and the low permeability of the hydrate-bearing sediments is identified as one of the crucial factors. Artificial fracturing is proposed to promote gas production rate by improving reservoir permeability. In this research, numerical studies about the effect of fracture length and fluid conductivity on production performance were carried out on an artificially fractured Class 3 hydrate reservoir (where the single hydrate zone is surrounded by an overlaying and underlying hydrate-free zone), in which the equivalent conductivity method was applied to depict the artificial fracture. The results show that artificial fracture can enhance gas production by offering an extra fluid flow channel for the migration of gas released from hydrate dissociation. The effect of fracture length on production is closely related to the time frame of production, and gas production improvement by enlarging the fracture length is observed after a certain production duration. Through the production process, secondary hydrate formation is absent in the fracture, and the high conductivity in the fracture is maintained. The results indicate that the increase in fracture conductivity has a limited effect on enhancing gas production.
format	article
author	Shilong Shang Lijuan Gu Hailong Lu
author_facet	Shilong Shang Lijuan Gu Hailong Lu
author_sort	Shilong Shang
title	The Effects of the Length and Conductivity of Artificial Fracture on Gas Production from a Class 3 Hydrate Reservoir
title_short	The Effects of the Length and Conductivity of Artificial Fracture on Gas Production from a Class 3 Hydrate Reservoir
title_full	The Effects of the Length and Conductivity of Artificial Fracture on Gas Production from a Class 3 Hydrate Reservoir
title_fullStr	The Effects of the Length and Conductivity of Artificial Fracture on Gas Production from a Class 3 Hydrate Reservoir
title_full_unstemmed	The Effects of the Length and Conductivity of Artificial Fracture on Gas Production from a Class 3 Hydrate Reservoir
title_sort	effects of the length and conductivity of artificial fracture on gas production from a class 3 hydrate reservoir
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2d1e406513b542988ffa755495276275
work_keys_str_mv	AT shilongshang theeffectsofthelengthandconductivityofartificialfractureongasproductionfromaclass3hydratereservoir AT lijuangu theeffectsofthelengthandconductivityofartificialfractureongasproductionfromaclass3hydratereservoir AT hailonglu theeffectsofthelengthandconductivityofartificialfractureongasproductionfromaclass3hydratereservoir AT shilongshang effectsofthelengthandconductivityofartificialfractureongasproductionfromaclass3hydratereservoir AT lijuangu effectsofthelengthandconductivityofartificialfractureongasproductionfromaclass3hydratereservoir AT hailonglu effectsofthelengthandconductivityofartificialfractureongasproductionfromaclass3hydratereservoir
_version_	1718412340413595648

The Effects of the Length and Conductivity of Artificial Fracture on Gas Production from a Class 3 Hydrate Reservoir

Ejemplares similares