摘要
南海东沙海域的陆坡台地区,浅表断裂及生物礁发育众多,浅层新生界多为碳酸盐岩层,中深层的中生界内部构造复杂,断裂较多,常规单船窄方位地震剖面显示中深层反射品质较差。利用双船可以设计灵活的观测系统,形成双方位角地震探测方式,对于地下同一反射点的照明,可以获得比窄方位角探测更好的效果,也可以改善高速屏蔽层下方、高陡倾角斜层等区域的成像质量。文章通过重点技术的攻关研发,进行了单源激发、双缆接收的双方位角采集试验,成功实现该方法在南海海域中深层地震勘探中的应用。
In Dongsha slope of the South China Sea, shallow fracture and reefs are numerous. Shallow Cenozoic is composedof carbonate rocks. The internal structure of deep Mesozoic is complex, with a lot of fracture. The conventional single vesselnarrow azimuth seismic section shows poor reflection quality in deep sea. Dual vessels can be used to design flexibleobservation geometry, such as dual-azimuth seismic exploration. For the same reflection point lighting, this method ofdual-azimuth seismic exploration is better than the narrow azimuth detection beneath the high acoustic velocity layer and thesteep dip angle layer. Through key technology research and development, the dual-azimuth seismic acquisition was carried outby using single source and two streamers on both sides. We successfully implemented the experiment for the deep targetseismic exploration in the South China Sea.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2018年第1期98-104,共7页
Journal of Tropical Oceanography
基金
国家海洋地质保障工程项目(GZH201200508)~~
关键词
双船地震
双方位角
观测系统
采集参数
合成剖面
dual-vessel seismic survey
dual-azimuth
observation geometry
acquisition parameter
synthetic array profile
