Calculation of methane hydrate solubility in marine environment and its constraints on gas hydrate occurrence
文献类型：期刊论文
| 作者 | Su Zheng; Chen Duo-Fu |
| 刊名 | Chinese journal of geophysics-chinese edition
 |
| 出版日期 | 2007-09-01 |
| 卷号 | 50期号:5页码:1518-1526 |
| 关键词 | Methane hydrate system Methane solubility Methane phase Ghsz calculation Hydrate and free gas concentration Hydrate ridge Blake ridge |
| ISSN号 | 0001-5733 |
| 通讯作者 | Chen duo-fu(cdf@gig.ac.cn) |
| 英文摘要 | Besides appropriate temperature and pressure, sufficient gas supply is necessary for gas hydrate crystallization within gas hydrate stable zone (ghsz) of marine environment. in this article we construct the calculation of methane solubilities in the equilibrium system of hydrate-water-free gas, hydrate-water, and water-free gas. the phase diagram of methane solubility versus depth is figured out, by which four phase fields of methane occurrence, namely free gas field, dissolved gas field, hydrate-water field and hydrate-water-free gas field. the contents of hydrate and free gas at sites 1249 9 1250, 997 are computed. at site 1249 and 1250, hydrate content is 10% similar to 61% (13.5 similar to 72.4 mbsf) and 0.7% similar to 1.9% (35 similar to 106.5 mbsf) in sediment pores, respectively. the layer of free gas immediately below the base of ghsz at these two sites is about 22 in thick, and its free gas content is about 4% in sediment pores. at site 997 there is no hydrate in the sediment above 146.9 mbsf, hydrate occurs from 202.4 to 433.3 mbsf occupying about 5% similar to 7% of porosity. the free gas layer is about 80 in thick below the hydrate layer, and concentration of methane free gas is about 0.2% similar to 28% in the pore. |
| WOS关键词 | PORE-SIZE DISTRIBUTIONS ; SEA-FLOOR ; PHASE-EQUILIBRIA ; SILICA-GELS ; POROUS-MEDIA ; WATER ; STABILITY ; SEDIMENTS ; RIDGE ; DISSOCIATION |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000249679300028 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2383316 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Chen Duo-Fu |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su Zheng,Chen Duo-Fu. Calculation of methane hydrate solubility in marine environment and its constraints on gas hydrate occurrence[J]. Chinese journal of geophysics-chinese edition,2007,50(5):1518-1526. |
| APA | Su Zheng,&Chen Duo-Fu.(2007).Calculation of methane hydrate solubility in marine environment and its constraints on gas hydrate occurrence.Chinese journal of geophysics-chinese edition,50(5),1518-1526. |
| MLA | Su Zheng,et al."Calculation of methane hydrate solubility in marine environment and its constraints on gas hydrate occurrence".Chinese journal of geophysics-chinese edition 50.5(2007):1518-1526. |
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来源：中国科学院大学
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