摘要
针对海底地震仪(OBS)数据基准面校正的特殊性,采用Kirchhoff积分法对中国南海实际OBS资料进行了基准面校正处理,将炮点延拓到OBS所在处的海底面上,取得了预期的效果。分析表明该延拓法对地震波场的分辨率及信噪比影响不大,且与静校正方法相比较,该方法能够得到地下地层较真实的速度场,这对于后续的动校正、叠加等常规处理十分重要。
When the OBS（ocean bottom seismograph） technique is used to explore the Earth,the shots are on the sea surface and the receivers are on the sea floor,so the OBS data can＇t be processed in the conventional seismic data processing method.In order to solve this problem,the shots and OBS need correcting into the same surface.Here the Kirchhoff integration method is carried out to extrapolate the shots onto the sea bottom surface where the OBS lies on and ideal results are achieved.The Kirchhoff extrapolation processing used here causes little negative influence on the resolution and wave field＇s signal/noise ratio.In addition,more accurate velocity field is achieved by velocity analysis to the extrapolated data than to the static shift corrected data,and this is very important to the consecutive data processing such as NMO（normal moveout）,stack and so on.
出处
《现代地质》
CAS
CSCD
北大核心
2012年第6期1231-1236,共6页
Geoscience
基金
中央高校基本科研业务费专项资金资助项目(2011YYL135)
国家"973"计划项目(2009CB219505)
中国地质大学国际科技合作项目(2010DFA21630)
关键词
海底地震仪
静校正
KIRCHHOFF积分法
ocean bottom seismograph
static shift correction
Kirchhoff integration method
