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Effect of thermal stimulation on gas production from hydrate deposits in Shenhu area of the South China Sea
Su Zheng1,2; Huang Li1,2; Wu NengYou1,2; Yang ShengXiong3
2013-04-01
Source PublicationSCIENCE CHINA-EARTH SCIENCES
Volume56Issue:4Pages:601-610
AbstractThe Shenhu area on the northern continental slope of the South China Sea (SCS) is one of the promising fields for gas hydrate exploitation. The hydrate-bearing layer at drilling site SH2 is overlain and underlain by permeable zones of mobile water. In this study a vertical well was configured with a perforated Interval I for producing gas and a coiled Interval II for heating sediment. The hydrate is dissociated by a small depressurization at Interval I and a thermal stimulation at Interval II. The numerical simulations indicate that the thermal stimulation has a significant effect on gas release from the hydrates in the production duration and improves the gas production in the late period. The gas released by thermal stimulation cannot be produced as quickly as the production gets operated because of the hard pathway for fluids to flow in the sediments. The gas production is enhanced due to the heating for 7242 m(3) in the whole production. Increasing heating temperature at Interval II can improve gas production and restrain water output, and advance the arrival time of the gas flow from the zone at Interval II. The absolute criterion and relative criterion suggest that the thermal stimulation in the production schemes is pronounced for releasing gas from the hydrate deposit, but the production efficiency of gas is limited by the sediment of low permeability. The study provides an insight into the production potential of the hydrate accumulations by thermal stimulation with depressurization in two wells, and a basis for analyzing economic feasibility of gas production from the area.
SubtypeArticle
KeywordGas Hydrates Shenhu Area Hydrate Dissociation Thermal Stimulation Numerical Simulation
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11430-013-4587-4
WOS Subject ExtendedGeology
WOS KeywordDECOMPOSITION
Indexed BySCI
Language英语
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000317347200011
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10032
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Peoples R China
2.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Peoples R China
3.Guangzhou Marine Geol Survey, Guangzhou 510075, Peoples R China
Recommended Citation
GB/T 7714
Su Zheng,Huang Li,Wu NengYou,et al. Effect of thermal stimulation on gas production from hydrate deposits in Shenhu area of the South China Sea[J]. SCIENCE CHINA-EARTH SCIENCES,2013,56(4):601-610.
APA Su Zheng,Huang Li,Wu NengYou,&Yang ShengXiong.(2013).Effect of thermal stimulation on gas production from hydrate deposits in Shenhu area of the South China Sea.SCIENCE CHINA-EARTH SCIENCES,56(4),601-610.
MLA Su Zheng,et al."Effect of thermal stimulation on gas production from hydrate deposits in Shenhu area of the South China Sea".SCIENCE CHINA-EARTH SCIENCES 56.4(2013):601-610.
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