Seafloor subsidence induced by gas recovery from a hydrate-bearing sediment using multiple well system
The response behavior of the methane exploitation from natural gas hydrate (NGH) using multiple well system is complex and needs to be investigated, as gas production from a single vertical well generally cannot meet commercial demand. This study numerically investigates the production performance a...
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ftchacadsciegiec:oai:ir.giec.ac.cn:344007/25557 2023-05-15T17:12:07+02:00 Seafloor subsidence induced by gas recovery from a hydrate-bearing sediment using multiple well system Jin, Guangrong Lei, Hongwu Xu, Tianfu Liu, Lihua Xin, Xin Zhai, Haizhen Liu, Changling 2019-09-01 http://ir.giec.ac.cn/handle/344007/25557 https://doi.org/10.1016/j.marpetgeo.2019.05.008 英语 eng ELSEVIER SCI LTD MARINE AND PETROLEUM GEOLOGY http://ir.giec.ac.cn/handle/344007/25557 doi:10.1016/j.marpetgeo.2019.05.008 Natural gas hydrate Gas recovery Geomechanical response Multiple wells system Well spacing SOUTH CHINA SEA METHANE-HYDRATE SHENHU AREA MECHANICAL-PROPERTIES BEHAVIOR CORE DEPRESSURIZATION PERMEABILITY DISSOCIATION COMPRESSION Geology Geosciences Multidisciplinary 期刊论文 2019 ftchacadsciegiec https://doi.org/10.1016/j.marpetgeo.2019.05.008 2022-09-23T14:15:23Z The response behavior of the methane exploitation from natural gas hydrate (NGH) using multiple well system is complex and needs to be investigated, as gas production from a single vertical well generally cannot meet commercial demand. This study numerically investigates the production performance and geomechanical response of an unconfined hydrate deposit in Shenhu area, South China Sea, under single and multiple vertical well conditions. For a single vertical well with a mild constant bottom-hole pressure, gas production is relatively stable. However, seafloor subsidence exhibits an initial rapid drop and a subsequent mild drop stage. The vertical displacement is highly developed at the top and bottom of the production zone. The results from doublet and triplet vertical wells indicate that both the gas and water production and seafloor subsidence increase with the increase in number of production wells. The superimposition of subsidence leads to a deterioration in subsidence and the change in location for the largest subsidence, which may affect the risk location of well instability. The interference of pore pressure and subsidence increases with the decrease in well spacing. However, gas production decreases and water production changes insignificantly. Furthermore, a same subsidence at seafloor cannot indicate the same evolution of subsidence in the vertical and lateral direction. The results presented in this study help in balancing the production and subsidence of the NGH exploitation in complex well configurations. Report Methane hydrate Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR Marine and Petroleum Geology 107 438 450 |
institution |
Open Polar |
collection |
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR |
op_collection_id |
ftchacadsciegiec |
language |
English |
topic |
Natural gas hydrate Gas recovery Geomechanical response Multiple wells system Well spacing SOUTH CHINA SEA METHANE-HYDRATE SHENHU AREA MECHANICAL-PROPERTIES BEHAVIOR CORE DEPRESSURIZATION PERMEABILITY DISSOCIATION COMPRESSION Geology Geosciences Multidisciplinary |
spellingShingle |
Natural gas hydrate Gas recovery Geomechanical response Multiple wells system Well spacing SOUTH CHINA SEA METHANE-HYDRATE SHENHU AREA MECHANICAL-PROPERTIES BEHAVIOR CORE DEPRESSURIZATION PERMEABILITY DISSOCIATION COMPRESSION Geology Geosciences Multidisciplinary Jin, Guangrong Lei, Hongwu Xu, Tianfu Liu, Lihua Xin, Xin Zhai, Haizhen Liu, Changling Seafloor subsidence induced by gas recovery from a hydrate-bearing sediment using multiple well system |
topic_facet |
Natural gas hydrate Gas recovery Geomechanical response Multiple wells system Well spacing SOUTH CHINA SEA METHANE-HYDRATE SHENHU AREA MECHANICAL-PROPERTIES BEHAVIOR CORE DEPRESSURIZATION PERMEABILITY DISSOCIATION COMPRESSION Geology Geosciences Multidisciplinary |
description |
The response behavior of the methane exploitation from natural gas hydrate (NGH) using multiple well system is complex and needs to be investigated, as gas production from a single vertical well generally cannot meet commercial demand. This study numerically investigates the production performance and geomechanical response of an unconfined hydrate deposit in Shenhu area, South China Sea, under single and multiple vertical well conditions. For a single vertical well with a mild constant bottom-hole pressure, gas production is relatively stable. However, seafloor subsidence exhibits an initial rapid drop and a subsequent mild drop stage. The vertical displacement is highly developed at the top and bottom of the production zone. The results from doublet and triplet vertical wells indicate that both the gas and water production and seafloor subsidence increase with the increase in number of production wells. The superimposition of subsidence leads to a deterioration in subsidence and the change in location for the largest subsidence, which may affect the risk location of well instability. The interference of pore pressure and subsidence increases with the decrease in well spacing. However, gas production decreases and water production changes insignificantly. Furthermore, a same subsidence at seafloor cannot indicate the same evolution of subsidence in the vertical and lateral direction. The results presented in this study help in balancing the production and subsidence of the NGH exploitation in complex well configurations. |
format |
Report |
author |
Jin, Guangrong Lei, Hongwu Xu, Tianfu Liu, Lihua Xin, Xin Zhai, Haizhen Liu, Changling |
author_facet |
Jin, Guangrong Lei, Hongwu Xu, Tianfu Liu, Lihua Xin, Xin Zhai, Haizhen Liu, Changling |
author_sort |
Jin, Guangrong |
title |
Seafloor subsidence induced by gas recovery from a hydrate-bearing sediment using multiple well system |
title_short |
Seafloor subsidence induced by gas recovery from a hydrate-bearing sediment using multiple well system |
title_full |
Seafloor subsidence induced by gas recovery from a hydrate-bearing sediment using multiple well system |
title_fullStr |
Seafloor subsidence induced by gas recovery from a hydrate-bearing sediment using multiple well system |
title_full_unstemmed |
Seafloor subsidence induced by gas recovery from a hydrate-bearing sediment using multiple well system |
title_sort |
seafloor subsidence induced by gas recovery from a hydrate-bearing sediment using multiple well system |
publisher |
ELSEVIER SCI LTD |
publishDate |
2019 |
url |
http://ir.giec.ac.cn/handle/344007/25557 https://doi.org/10.1016/j.marpetgeo.2019.05.008 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
MARINE AND PETROLEUM GEOLOGY http://ir.giec.ac.cn/handle/344007/25557 doi:10.1016/j.marpetgeo.2019.05.008 |
op_doi |
https://doi.org/10.1016/j.marpetgeo.2019.05.008 |
container_title |
Marine and Petroleum Geology |
container_volume |
107 |
container_start_page |
438 |
op_container_end_page |
450 |
_version_ |
1766068900695375872 |