墨西哥湾海洋地震数据处理案例分析
|
摘要
本文所研究的墨西哥湾深海地震资料取自水深1900～3000m区域。该区盐丘发育,速度纵、横向变化大,多次波及涌浪噪声、外源噪声干扰严重。在进行地震资料处理时,针对上述特点,采用了相应的措施:①认真分析和检查电缆漂移对资料处理的影响,通过面元规则化等手段消除电缆漂移的影响;②选用合适的方法消除多次波、涌浪及外源噪声引起的干扰;③通过建立合理的叠前时间偏移速度场实现叠前时间偏移成像。
The deep-sea seismic data in Mexico Bay the paper studied comes from the region of water depth 1900~3000m, which is characterized by developed salt dome,large variation of vertical and horizontal velocities and severe interference from multiple, surged waves and outside noises. During seismic data processing, we adopted corresponding measures to handle abovementioned characters:①careful analysis and checkup of the influence of feathering on data processing, which was reduced by bin regulanzation;②selecting the appropriate approach to diminish the interference from multiple, surged waves and outside noises;③the prestack time migration imaging was implemented by buildup of reasonable velocity field of prestack time migration.
The deep-sea seismic data in Mexico Bay the paper studied comes from the region of water depth 1900~3000m, which is characterized by developed salt dome,large variation of vertical and horizontal velocities and severe interference from multiple, surged waves and outside noises. During seismic data processing, we adopted corresponding measures to handle abovementioned characters:①careful analysis and checkup of the influence of feathering on data processing, which was reduced by bin regulanzation;②selecting the appropriate approach to diminish the interference from multiple, surged waves and outside noises;③the prestack time migration imaging was implemented by buildup of reasonable velocity field of prestack time migration.
引文
[1]Yilmaz O著,黄绪德等译．地震数据处理．北京:石油工业出版社,1994
[2]吴律．τ-p变化及应用．北京:石油工业出版社,1994
[2]吴律．τ-p变化及应用．北京:石油工业出版社,1994
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心