高保真多次波剔除法及其在海上地震资料处理中的应用
|
摘要
基于李庆忠院士剔除拟合P波方法的思路,提出了一种可以输出高保真地震道集记录的多次波剔除方法,并研制了相应的处理软件,达到了在道集上剔除多次波能量并且能够保留完整一次波AVO特征的目的。海上地震资料处理结果表明,由于软件中使用了一次波保护技术和近道多次波优先识别、优先剔除等技术,同时还集成了随机噪声压制功能和去假频功能,因此剔除多次波后的道集记录保真度高。本文提出方法对近道多次波压制能力强,处理速度快,适合海上大数据量常规处理及AVO分析前的数据预处理。
Based on an idea from Li Qinzhong’s fitting P-wave deletion method, a method to delete multiple reflections is proposed, which can provide CDP gathers with high fidelity, and the relevant software is developed. By using this method and software, we can delete multiple reflections form CDP gathers and reserve AVO characteristics of primary reflection. The processing results of offshore seismic data show that the CDP gathers after deleting multiple reflections have high fidelity because of the application of several techniques in the software, such as primary protection priority identification and deletion of near trace multiples, and because of the integration with random noise attenuation and anti-alias functions. This method can be used to process huge offshore seismic data and prepare data for AVO analysis, in terms of its strong deletion of near trace multiples and high processing speed.
Based on an idea from Li Qinzhong’s fitting P-wave deletion method, a method to delete multiple reflections is proposed, which can provide CDP gathers with high fidelity, and the relevant software is developed. By using this method and software, we can delete multiple reflections form CDP gathers and reserve AVO characteristics of primary reflection. The processing results of offshore seismic data show that the CDP gathers after deleting multiple reflections have high fidelity because of the application of several techniques in the software, such as primary protection priority identification and deletion of near trace multiples, and because of the integration with random noise attenuation and anti-alias functions. This method can be used to process huge offshore seismic data and prepare data for AVO analysis, in terms of its strong deletion of near trace multiples and high processing speed.
引文
1 李承楚.关于中值滤波的理论基础.石油地球物理勘探,1986,21(4):372～379
2 王宏伟.矢量分解法去噪.石油地球物理勘探,1989,24(1):16～29
3 林盛.叠前相干干扰滤波.石油地球物理勘探,1998,33(3):390～398
4 夏洪瑞.均值加权消除相干干扰.石油物探,2000,39(2):71～82
5 王卫华.利用中值相关滤波预测相干信号.石油地球物理勘探,2000,35(3):273～282
6 何汉漪.海上地震资料高分辨率处理技术论文集.北京:地质出版社,2001.39～47
7 夏洪瑞.中值约束下的矢量分解去噪.石油物探,2001,40(3):29～33
2 王宏伟.矢量分解法去噪.石油地球物理勘探,1989,24(1):16～29
3 林盛.叠前相干干扰滤波.石油地球物理勘探,1998,33(3):390～398
4 夏洪瑞.均值加权消除相干干扰.石油物探,2000,39(2):71～82
5 王卫华.利用中值相关滤波预测相干信号.石油地球物理勘探,2000,35(3):273～282
6 何汉漪.海上地震资料高分辨率处理技术论文集.北京:地质出版社,2001.39～47
7 夏洪瑞.中值约束下的矢量分解去噪.石油物探,2001,40(3):29～33
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