2002-01-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/714420摘要：瓦斯水合物(gas hydrate)是一種由水分子組成的籠狀構造包裹住甲烷、乙烷、丙烷或二氧化碳等氣體分子的結晶籠形包合物，由於甲烷為最主要的氣體分子，常被稱為甲烷水合物。在自然界中甲烷水合物存在於低溫高壓的環境下，如極區永凍層及大陸斜坡處。由於其在常溫常壓下會解離產生水和天然氣，且其全球蘊藏量所含的天然氣中的有機碳量為目前已知全球化石燃料等能源有機碳總儲量之兩倍，已被視為二十一世紀最有希望的新能源。台灣西南海域也證實有廣泛的甲烷水合物存在，然而由於尚未進行有系統的測勘調查，對於這個區域中甲烷水合物的分布與蘊藏量並無明確資料，相關研究也未積極展開。 由於調查海域中甲烷水合物的分布主要依據震測剖面中所顯示的海底仿擬反射(BSR)信號，本研究擬以一年的時間，利用計畫主持人所持有的震測資料，針對台灣西南海域的BSR分布及特性做全面的檢視，一以擇定一最有潛力開發甲烷水合物的地區供做下一階段研究的重點目標區，另則學習並建立最新的震測資料分析技術，以增加我們對甲烷水合物在沉積層中所表現出一些物理特性的瞭解。 鑑於甲烷水合物在未來能源開發上的重要性，以及美、日等國在甲烷水合物探勘技<br> Abstract: Naturally occurring gas hydrate is a solid, ice-like substance, composed of rigid cages of water molecules that enclose molecules of gas, mainly methane, thus often being called methane hydrate. Methane hydrate formation is stable under low temperature and high pressure conditions. These conditions exist on earth in polar regions as well as in submarine continental slopes and rises. Under normal pressure and temperature conditions on earth’s surface, methane hydrate will dissociate into methane gas and water. Since the estimated amount of the presently known methane hydrate reserves is very large, methane hydrate has been regarded as the most likely new energy resources in the 21st century. It has been proven that there are vast amount of methane hydrates distributed in the area offshore southwest Taiwan, however, due to the fact that there has no funded research on methane hydrate study, the actual distribution and the amount of gas hydrate in existence are little known. Investigation of the methane hydrate in the offshore environment depends heavily on geophysical observations, especially the seismic methods. The presence of methane hydrate deposits has been inferred from the appearance of “bottom simulating reflection” (BSR) on marine seismic profiles. Thus, this proposal intends to carefully review all the seismic reflection profiles in the area offshore southwest Taiwan for the purposes of mapping the distribution of BSR and documenting its characteristics. The objectives of this proposal are: First, to understand the distribution and characters of the methane hydrate offshore SW Taiwan and to identify an area where the concentration of methane hydrate warrants detailed investigation in the future. Second, to learn and establish the most advanced geophysical techniques for methane hydrate analyses, and to develop a practical approach to investigate some physical properties of the methane hydrate bearing sediments. To achieve these goals, the principal investigator of this proposal will participate in the gas hydrate research work conducted at the US Geological Survey and the Ocean Drilling Program. We will also collaborate with other colleagues in Taiwan who intend to investigate methane hydrate via other means. After the completion of this project, we shall be ready to carry out a multi-year integrated research program to investigate the properties of methane hydrate in a selected target area offshore SW Taiwan, and eventually to develop methane hydrate into a potential new energy resource.甲烷水合物海底仿擬反射(BSR)震測資料處理震測特性分析台灣西南海域Methane hydrateBottom simulating reflectionSeismic data processingSeismic attributes analysesOffshore southwest Taiwan.