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Evaluation of Gas Production Potential from Marine Gas Hydrate Deposits in Shenhu Area of South China Sea
Li, Gang1; Moridis, George J.2; Zhang, Keni2; Li, Xiao-Sen1
2010-11-01
Source PublicationENERGY & FUELS
ISSN0887-0624
Volume24Pages:6018-6033
Contribution Rank[Li, Gang; Li, Xiao-Sen] Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Peoples R China; [Moridis, George J.; Zhang, Keni] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
Cooperation Status国际
AbstractThe Shenhu Area is located in the Pearl River Mouth Basin the northern continental slope of the South China Sea In 2007 gas hydrate samples were recovered during the scientific expedition conducted by the China Geological Survey in the area Using numerical simulation and currently available data from site measurements including the water depth, thickness of the hydrate bearing layer (HBL) sediment porosity, salinity, and pressures and temperatures at key locations, we developed preliminarily estimates of the production potential of these hydrates as gas-producing resource We used measurements of ambient temperature in the sediments to determine the local geothermal gradient Evidence from this and other field studies showed that the initial pressure distribution followed the hydrostatic gradient Direct measurements from core samples provided estimates of the initial hydrate saturation and of the intrinsic permeabilities in the various strata of the system The hydrate accumulations in the Shenhu Area appear to be hydrate deposits involving a single HBL within fine textured sediments and boundaries (overburden and underburden layers) which have the same intrinsic permeabilities with the HBL We investigated gas production from the Shenhu hydrates by means of depressurization and thermal stimulation using a single horizontal well placed in the middle of the HBL The simulation results indicated that the hydrates dissociate along cylindrical Interfaces around the well and along horizontal dissociation interfaces at the top and bottom of the HBL Production is invariably lower than that attainable in a confined system, and thermal stimulation is shown to affect only a limited region around the well The sensitivity analysis demonstrates the dependence of production on the level of depressurization, the initial hydrate saturation, the intrinsic permeability of the HBL, the temperature of the well, and the initial temperature of the HBL A general observation is that gas production is low and is burdened with significant water production, making the hydrate accumulations at the Shenhu Area unattractive production targets with current technology
SubtypeArticle
Other AbstractThe Shenhu Area is located in the Pearl River Mouth Basin the northern continental slope of the South China Sea In 2007 gas hydrate samples were recovered during the scientific expedition conducted by the China Geological Survey in the area Using numerical simulation and currently available data from site measurements including the water depth, thickness of the hydrate bearing layer (HBL) sediment porosity, salinity, and pressures and temperatures at key locations, we developed preliminarily estimates of the production potential of these hydrates as gas-producing resource We used measurements of ambient temperature in the sediments to determine the local geothermal gradient Evidence from this and other field studies showed that the initial pressure distribution followed the hydrostatic gradient Direct measurements from core samples provided estimates of the initial hydrate saturation and of the intrinsic permeabilities in the various strata of the system The hydrate accumulations in the Shenhu Area appear to be hydrate deposits involving a single HBL within fine textured sediments and boundaries (overburden and underburden layers) which have the same intrinsic permeabilities with the HBL We investigated gas production from the Shenhu hydrates by means of depressurization and thermal stimulation using a single horizontal well placed in the middle of the HBL The simulation results indicated that the hydrates dissociate along cylindrical Interfaces around the well and along horizontal dissociation interfaces at the top and bottom of the HBL Production is invariably lower than that attainable in a confined system, and thermal stimulation is shown to affect only a limited region around the well The sensitivity analysis demonstrates the dependence of production on the level of depressurization, the initial hydrate saturation, the intrinsic permeability of the HBL, the temperature of the well, and the initial temperature of the HBL A general observation is that gas production is low and is burdened with significant water production, making the hydrate accumulations at the Shenhu Area unattractive production targets with current technology
KeywordMethane Hydrate Simulation Sediments Zone Well
Subject AreaEnergy & Fuels ; Engineering
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ef100930m
WOS Subject ExtendedEnergy & Fuels ; Engineering
URL查看原文
WOS KeywordMETHANE HYDRATE ; SIMULATION ; SEDIMENTS ; ZONE ; WELL
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China [20773133, 51004089, 51076155]; CAS [KGCX2 YW 3X6, YZ200717]; Science & Technology Program of Guangdong Province [2009B050600006]; Assistant Secretary for Fossil Energy Office of Natural Gas and Petroleum Technology, through the National Energy Technology Laboratory, under the U S Department of Energy [DE AC02 05CH11231]
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000285265800023
Citation statistics
Cited Times:76[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/8477
Collection中国科学院广州能源研究所
天然气水合物开采技术与综合利用实验室
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Peoples R China
2.Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
Recommended Citation
GB/T 7714
Li, Gang,Moridis, George J.,Zhang, Keni,et al. Evaluation of Gas Production Potential from Marine Gas Hydrate Deposits in Shenhu Area of South China Sea[J]. ENERGY & FUELS,2010,24:6018-6033.
APA Li, Gang,Moridis, George J.,Zhang, Keni,&Li, Xiao-Sen.(2010).Evaluation of Gas Production Potential from Marine Gas Hydrate Deposits in Shenhu Area of South China Sea.ENERGY & FUELS,24,6018-6033.
MLA Li, Gang,et al."Evaluation of Gas Production Potential from Marine Gas Hydrate Deposits in Shenhu Area of South China Sea".ENERGY & FUELS 24(2010):6018-6033.
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