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Numerical investigation on methane hydrate accumulation in Shenhu Area, northern continental slope of South China Sea
Su, Zheng1,2; Cao, Yuncheng1,3; Wu, Nengyou1,2; Chen, Duofu1; Yang, Shengxiong3,4; Wang, Hongbin4
2012-12-01
Source PublicationMARINE AND PETROLEUM GEOLOGY
Volume38Issue:1Pages:158-165
Abstract

The hydrate deposits in Shenhu Area on northern continental slope of the South China Sea is regarded as one of the promising targets for gas hydrate exploration and exploitation in China. The hydrates concentrate at base of gas hydrate stability zone (GHSZ) with a peak saturation of 48%. However, the formation mechanism and controlling factors of the hydrates remain unclear. Previous studies suggested that sedimentation flux and water flux are two fundamental parameters controlling hydrate accumulation. Here, we have applied a one-dimensional dynamic model to characterize the hydrate evolution pattern at a drilling site of SH2 in Shenhu Area. The hydrate saturations modeled at current sedimentation rate and water flow rate were much different from the values approved. Some perturbations of the two parameters seemed to be useless to improve the modeling. The big finding was that the modeled result basically matched the saturation values at initial hydrate saturations of 20-22%. The results indicated that massive gas hydrates formed in the early fractured sediment in Shenhu Area, the sediment evolved by inheriting the "ancient" hydrate and lasted for similar to 1.5 Myrs before present and produces the current hydrate feature. The modeling implies that resource potential of Shenhu hydrate has been decreasing. (C) 2012 Elsevier Ltd. All rights reserved.

SubtypeArticle
KeywordShenhu Area Gas Hydrate Hydrate Formation Hydrate Saturation Numerical Modeling
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.marpetgeo.2012.06.005
WOS Subject ExtendedGeology
WOS KeywordGULF-OF-MEXICO ; GAS HYDRATE ; MARINE-SEDIMENTS ; ANAEROBIC OXIDATION ; SULFATE REDUCTION ; STABILITY ZONE ; MODEL ; FLOOR ; SOLUBILITY
Indexed BySCI
Language英语
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000310668100012
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10165
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou, Guangdong, Peoples R China
2.Chinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou, Guangdong, Peoples R China
3.Chinese Acad Sci, Key Lab Marginal Sea Geol, Guangzhou Inst Geochem, Guangzhou, Guangdong, Peoples R China
4.Guangzhou Marine Geol Survey, Guangzhou, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Su, Zheng,Cao, Yuncheng,Wu, Nengyou,et al. Numerical investigation on methane hydrate accumulation in Shenhu Area, northern continental slope of South China Sea[J]. MARINE AND PETROLEUM GEOLOGY,2012,38(1):158-165.
APA Su, Zheng,Cao, Yuncheng,Wu, Nengyou,Chen, Duofu,Yang, Shengxiong,&Wang, Hongbin.(2012).Numerical investigation on methane hydrate accumulation in Shenhu Area, northern continental slope of South China Sea.MARINE AND PETROLEUM GEOLOGY,38(1),158-165.
MLA Su, Zheng,et al."Numerical investigation on methane hydrate accumulation in Shenhu Area, northern continental slope of South China Sea".MARINE AND PETROLEUM GEOLOGY 38.1(2012):158-165.
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