摘要
近几年,OBS(海底地震仪)勘探技术得到了较大的发展和完善。在海上多分量勘探中,OBS在勘探海底天然气水合物方面有着非常明显的效果。从OBS勘探的观测系统设计、数据处理与解释及实例分析等多方面出发,结合国内外前人的经验,对OBS勘探天然气水合物技术进行了系统的总结与研究。利用OBS勘探海底天然气水合物时,由于其独特的布设方式使其能够采集到转换S波,再利用P波和转换S波速度曲线的差异则可验证海底是否蕴含天然气水合物。
In recent years,ocean bottom seismic(OBS) develops quickly.OBS is more effective than other multi-component seismic methods in detecting gas-hydrate.The paper reviewed the exploration of gas hydrate with OBS technology in terms of geometry design,data processing and interpretation.Real examples were also presented.The unique layout of OBS survey ensures the availability of converted S-waves.Gas hydrate is detectable using the difference between P-and converted S-wave velocity curves.
出处
《勘探地球物理进展》
2008年第4期259-264,共6页
Progress in Exploration Geophysics
关键词
OBS
转换波
极化旋转
天然气水合物
游离气
ocean bottom seismic
converted wave
polarization rotation
gas hydrate
free gas
