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Modeling calculation of top occurrence of marine gas hydrates
Cao, YC; Chen, DF;
AbstractA major problem in evaluation of gas hydrate resources is lack of a reliable technique to constrain the top occurrence of gas hydrates. We have developed a numerical model of the top occurrence of gas hydrates based on that the depleted quantity of sulfate diffusion downward equals to that of methane flux upward at sulfate-methane interface (SMI) and the methane solubility in the water-hydrate system, using steady state and analytical expressions. In situ methane production and sulfate depletion associated with the oxidation of sedimentary organic matter were considered in the model. We applied this model to ODP site 1245 and IODP site 1327, and calculated the top of gas hydrate occurrence at these two sites, yielding 53 mbsf, 83 mbsf, respectively, which are consistent with the top depth estimated by drilling.
Department[Cao Yun-Cheng ; Chen Duo-Fu] Chinese Acad Sci, CAS Key Lab Marginal Sea Geol, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China ; [Chen Duo-Fu] Chinese Acad Sci, CAS Key Lab Marginal Sea Geol, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China
KeywordSulfate Profile Sulfate-methane Interface Methane Flux Top Occurrence Of Gas Hydrate Numerical Model
Subject AreaGeochemistry & Geophysics
Indexed Bysci
Funding Project海洋地质
WOS IDWOS:000332443600025
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
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GB/T 7714
Cao, YC,Chen, DF, Modeling calculation of top occurrence of marine gas hydrates[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2014,57(2):618-627.
APA Cao, YC,Chen, DF,& calculation of top occurrence of marine gas hydrates.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,57(2),618-627.
MLA Cao, YC,et al."Modeling calculation of top occurrence of marine gas hydrates".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 57.2(2014):618-627.
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