论文详情
海底地震仪(OBS)能够全方位同时记录纵波和转换横波,记录的资料具有信噪比高等特点,近年来在我国得到快速发展,并广泛应用于南海天然气水合物的勘探和识别,取得了良好的应用效果。以国内OBS技术发展史为基础,介绍了中国南海天然气水合物勘探历程,论述了OBS技术在水合物识别方面的必要性,列举了OBS技术勘探水合物的实例,并对OBS资料的处理、解释及反演技术进行了梳理,现有文献表明OBS技术在地层弹性参数反演、判定储层储集类型、水合物饱和度估计等方面发挥了重要作用,最后对OBS技术未来的发展及应用方向进行了展望。认为将OBS资料用于渗漏型水合物地震各向异性研究是未来的一个重要研究方向。
Gas hydrate has been generally considered a new,clean energy source with one of the greatest potentials in the 21st century;it is expected to replace coal,oil,and natural gas.It is also an energy source with huge reserves that has not yet been commercially developed.The ocean bottom seismic (OBS) data is able to concurrently record P-waves and converted S-waves,with a high signal-to-noise ratio.It is also able to carry out wide angle observation on the target body.In recent years,OBS exploration technology has been widely used throughout the world to detect gas hydrate.With the rapid development of OBS technology in China,it has been applied by researchers in the exploration and identification of gas hydrates in the South China Sea with good results.This study introduces the development history of OBS technology in China,discusses the necessity of OBS technology in hydrate identification,and then lists the examples of OBS exploration hydrate;this was based on the gas hydrate exploration history in the South China Sea and the history of OBS technology in China.Finally,the processing,interpretation,and inversion technology of OBS data is analyzed.OBS technology is considered to have already played an important role in the inversion of formation elastic parameters,the determination of reservoir types,and the estimation of hydrate saturation.Finally,the future development and application of OBS technology is outlined;one such future potential is the study of the seismic anisotropy of leaky hydrate using OBS data.
国家自然科学基金面上项目(41874131)、中央高校基本科研业务费项目(2652018269)共同资助。