2008-01-312024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/681480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，將以震測及地熱學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，並利用傳統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年期計畫將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進行仿3維震測、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。以中央地質調查所第1期4年在台灣西南海域對天然氣水合物之分布與特性之調查結果為基礎，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。本(97)年度計畫將由國內8位學者專家合作，進行之調查研究工作包括： 1.在台灣西南海域增積岩體地區(永安線形構造精查區)進行仿3維震測與海底地震儀觀測，並收集海床變頻聲納剖面資料以及地熱測量資料，以期對該探勘好景區能建立完整的天然氣水合物系統分析，提出最理想的鑽探目標。 2.評估並發展長支距反射與海底地震儀廣角反射與折射震波資料的分析技術，以掌握更多的地層中天然氣水合物特性與儲量資訊。 3.採購紅外線測溫熱像儀，並建立紅外線掃描岩心標本之技術，以快速找出岩心標本中是否含有天然氣水合物。 4.彙整台灣西南海域天然氣水合物相關各項地球物理、地質與地化資訊，探討構造與沉積作用對天然氣的生成、移棲到儲存的影響，以天然氣水合物系統分析、觀念提出精查區內天然氣水合物及其下天然游離氣的可能賦存模式。 本計畫並將持續管理、維護天然氣水合物資料庫以及推展國際合作研究。 <br> Abstract: This proposal requests the 1st 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 will be carried out to investigate the detailed gas hydrate distribution and energy resource potential in the study area. In this 4-year program, gas hydrate prospects will be selected for in-depth investigation, petroleum system approach will be adapted to establish the “gas hydrate system” for each prospect. Large-offset deep seismic imaging data will be collected and analyzed across the area offshore of southwestern Taiwan to provide a structural framework and seismic characters of the hydrate-bear strata in the region. Major works to be carried out for this year (2008) include: 1.Integrations of geophysical data collected during the first phase of the Central Geological survey gas hydrate investigation program to select gas hydrate prospects, and to prepare for the deep seismic reflection and OBS surveys to be conducted in 2009. 2.Detailed investigation in a pre-selected area across the Yung-An Linearment (the 2004 2.5D survey area) will be conducted. The surveys will include pseudo-3D seismic experiment, OBS active source observations, chirp sonar profiling, and heat flow measurements. All the information obtained will be used to establish the gas hydrate system for this prospective area. This “intensive study area” will be used as a model for the study of other gas hydrate prospects. 3.A new thermal scan camera and data analysis system will be purchased. This system will help to quickly identify possible gas hydrate samples from long piston cores onboard survey ships. 4.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 evaluated and improved. We will also design a “gas hydrate information” web page for general education purpose. This project will also work closely with the 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地球物理探勘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