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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
发表期刊MARINE AND PETROLEUM GEOLOGY
卷号38期号:1页码:158-165
摘要

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.

文章类型Article
关键词Shenhu Area Gas Hydrate Hydrate Formation Hydrate Saturation Numerical Modeling
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.marpetgeo.2012.06.005
研究领域[WOS]Geology
关键词[WOS]GULF-OF-MEXICO ; GAS HYDRATE ; MARINE-SEDIMENTS ; ANAEROBIC OXIDATION ; SULFATE REDUCTION ; STABILITY ZONE ; MODEL ; FLOOR ; SOLUBILITY
收录类别SCI
语种英语
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000310668100012
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10165
专题中国科学院广州能源研究所
作者单位1.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
推荐引用方式
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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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