2010-01-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/681456摘要：本計畫為執行中央地質調查所推動之4年期「台灣西南海域新興能源-天然氣水合物資源調查與評估：震測及地熱調查」工作，將以震測及地熱等地球物理探測技術及分析方法在台灣西南海域進行天然氣水合物之調查與探勘研究，以暸解台灣西南海域探勘好景區內天然氣水合物之資源特性，並利用石油系統分析觀念建立調查區內天然氣水合物儲集系統，評估探勘好景區天然氣水合物可能之能源儲量及其開發潛能，規劃出最適合之鑽探井位。為達成本計畫之目標，本4年期計畫調查工作包括進行長支距多頻道深部地殼反射震測及海底地震儀探測，並在擇定之探勘好景區(鑽探井位規劃區)進行仿3維震測、長支距多頻道深部震測、海底地震儀觀測以及地熱量測與分析，以協助釐定每個鑽探好景區之鑽井位置與鑽探目標。所有收集來的資料及分析結果均將置入台灣西南海域天然氣水合物資料庫。本期計畫的工作重點在於整合各項資料，仔細分析並確切掌握探勘好景區內天然氣水合物之特性與能源潛能，因此本期計畫之執行團隊成員特別加強在震測資料之分析、解釋與應用。第2期的4年計畫目前即將展開第3年(99年度)工作。在97年度計畫執行期間，本計畫提出17個鑽探井位，並著重在井位地區之精查。98年度間，租用美國震測研究船，成功完成了長支距深部震測及海底地震儀觀測工作，並根據新收集來之震測與地熱資料與國際學者的建議，調整所提出17個井位之鑽探深度，並增加1個鑽探井位，共達13個站位、18個鑽探井位。本(99)年度計畫由國內8位學者專家合作，進行之調查研究工作包括： 1.使用海研一號在本年度規劃重點調查區，完成1鑽探井位區域(KP-8)的仿3維震測資料收集工作。 2.以分析97年度收集得來之仿3維震測資料之工作經驗為基礎，處理本(99)年度新收集之仿3維震測資料，並持續發展3維震測資料處理技術。 3.結合3維震測與海底地震儀資料，持續更新97年度在永安海脊地區收集之KP-4、KP-5-1，KP-5-2以及KP-5-3井位區之速度模型結果，並依建立之速度構造模型推估天然氣水合物之儲量。 4.反射震測與海底地震儀團隊將完成98年度「藍賽斯」號蒐集資料之分析、解釋與模擬工作，利用長支距反射資料建立各剖面之精細速度構造模式，並探討台灣西南海域之深部構造與沈積體系，以及台南盆地大陸棚及大陸斜坡之石油及天然氣成藏系統。 5.陳浩維教授將利用發展出之疊前成像技術持續處理長支距反射震測資料，而戚務正研究員將配合徐春田教授之工作，結合地熱資料與長支距震測、海底地震儀資料等，發展地層中流體移棲模擬技術，提高對含天然氣水物地層屬性的認知。 6.發展深部震測資料處理技術，如消除複反射、疊前移位等，並持續處理在台灣西南海域收集的長支距深部震測資料，以提高深部地層之影像品質。發展震測資料屬性分析技術如AVO分析等，以期更能掌握含天然氣水物地層的特性。 7.法國船Marion Dufresne (MD)岩心採樣航次中將以紅外線熱相測溫儀掃描取得的活塞岩心標本，以研判岩心中是否有天然氣水合物存在。另外，亦將在MD常岩心管上裝置小型地熱量測儀，以進行岩心採樣點的地熱量測。 8.描述MD航次收集來之岩心標本，並建立岩心地層柱與沈積像解釋。 9.持續修正鑽井計畫書或提出新的鑽探井位，並建立更符合各項觀測資料的天然氣水合物賦存系統。 10.更新與維護資料庫，更新WebGIS之圖層資訊，擴充並改進天然氣水合物資訊網頁內容。 11.國際合作，積極規劃與美國學者合作之ROV與AUV觀測計畫，台德合作於2012年利用德國研究船來台調查台灣西南海域之天然氣水合物賦存區之計畫做準備。另將邀請相關國外學者訪台。 <br> Abstract: This proposal requests the 3rd year support of the 4-year gas hydrate project entitled “Investigation and evaluation of gas hydrate resource potential in the offshore area of southwestern Taiwan: Seismic and heat flow studies”. Multichannel seismic reflection and chirp sonar profiling, ocean bottom seismometer (OBS) observation and heat flow measurements are carried out to investigate the detailed gas hydrate distribution and energy resource potential in the study area. In order to achieve these goals, this 4-year project will collect large-offset seismic reflection and OBS wide-angle reflection and refraction data, conduct pseudo 3D seismic reflection survey in selected prospective sites, measure heat flow values and integrating all the geophysical data analyses results to help define gas hydrate prospects. In the first year of this 4-year project, 17 gas hydrate prospects were selected as potential sites for future gas hydrate drilling investigation. Intensive high-resolution surveys are conducted to establish the “gas hydrate system” for each prospect. Large offset seismic reflection data as well as OBS data were colleted during the 2nd year of this project, and with further investigation and discussion, one more drilling site have been added to the proposed drilling site list. In the 3rd year of this project (this proposal), major works to be carried out include: 1.Collecting a new set of pseudo-3D seismic reflection survey data in the southern part of the Fangliao Ridge which is the key survey area of the 2010 gas hydrate investigation program. 2.Processing and analyzing the newly collected pseudo-3D seismic reflection data set to reveal detail structures of the KP-8 drilling site. 3.Large-offset deep seismic imaging data will be analyzed across the area offshore of southwestern Taiwan to provide a structural framework and seismic characters of the hydrate-bear strata in the region. 4.Processing and analyzing the 3D seismic data as well as the OBS data collected in 2008 to reveal the 3D structure and update the velocity model of the Yung-An Ridge area where 4 proposed dirlling sites are located. 5.Advanced processing techniques, like pre-stack processing techniques and de-multiple processing, will be applied to the large-offset seismic data, and detailed velocity and seismic attributes analysis will be carried out as well. 6.Seismic attribute analyses, such as AVO analyses will be performed to reveal physical properties of the hydrate-bearing sub-strata. 7.Using infrared camera to quickly identify possible gas hydrate samples in the long piston cores to be collectes by the French R/V Marion Dufresne (MD). 8.MD core samples will be described and stratigraphic column will be established for the MD long cores. 9.Data will be integrated to provide bases for revision of the proposed drilling sites. 10.New geophysical, geological and geochemical data will be added to the gas hydrate database, the capability of the GIS-based data management and displaying system will be up-graded and improved. We will also expand the contents of the “gas hydrate information” web page for general education purpose. 11.International cooperative projects will be promoted with possible collaboration with US scientists on AUV and ROV surveys, and preparation for collaboration with Germany on 3D seismic surevey and MeBo shallow seafloor drilling using R/V Sonne in 2012. This project will work closely with colleagues conducting geological and geochemical investigation and high-resolution sea floor survey in the study area. International cooperation will be emphasized so that advanced technology and experience gained by the foreign colleagues could be learned quickly.天然氣水合物台灣西南海域反射震測海底地震儀地熱量測地層構造沉積環境。Gas hydrateOffshore southwestern TaiwanSeismic explorationHeat flowGas hydrate systemDeposition environment.