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Amount Estimation and Geochemical Analysis of Gas Hydrate of Tai Xi Nan Basin
Author: BiHaiBo
Tutor: HuangHaiJun
School: Graduate School , Chinese Academy of Sciences ( Institute of Oceanography )
Course: Marine Geology
Keywords: hydrate stability zone dissolved methane amount of methane geochemical characteristic of pore water SMI depth
CLC: P744.4
Type: Master's thesis
Year: 2010
Downloads: 147
Quote: 0
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Abstract
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One of potential areas containing gas hydrate located in the continental slope of South China Sea is Taixi’nan basin. The study of the hydrate stability zone (HSZ) is of great significance in that it is beneficial to the research of the deposition and the distribution features of marine gas hydrate ore, and also to the resource assessment of the marine gas hydrate. On the basis of gas hydrate data from SO-177 cooperation voyage with China and Germany, we calculated the thickness of the gas hydrate stability zone of A and B; Furthermore, with the help of Geographic Information System (GIS) tools, we get the initial amount of methane in standard condition included in gas hydrate: 8.5739×1011～5.1443×1012 m3 for area A, 1.4518×1012～8.7111×1012 m3 for area B, and 2.3029×1012～13.8544×1012 m3 in all. The calculated results show that there is huge potential methane resource in Taixi’nan basin.Based on investigated data for the South China Sea, the paper analyzed dissolved methane in sea water and the relationship with methane seepages in the offshore area of southwest Taiwan, South China Sea. There are six styles about methane concentration profiles. The exceptionally high methane concentrations appeared in some stations in the bottom layes. In addition, the paper analyzed the geochemical data of the pore water of possibly high gas hydrate occurrence station where the SMI depth is speculated to less than 50m. The two evidence suggest the possible relation with existence of gas hydrate in this area.
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CLC: > Astronomy,Earth Sciences > Oceanography > Marine resources and development > Marine mineral resources and development > Oil and gas
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