摘要
近年来同时震源混合采集技术在高密度、宽方位勘探方面显示出广阔的应用前景。根据地震数据空间带宽有限的特点,讨论了直接反演分离方法。与常规的约束迭代反演分离算法不同,此方法无需迭代,只需在时间延迟算子的伪逆中加入基础点扩散矩阵,即可实现频率域混合数据的直接分离。通过改变基础点扩散矩阵,可将直接反演分离方法推广到检波点和炮点不规则排列的情形。理论模型数据测试结果表明,在满足分离条件下,该方法可以取得良好的分离效果,体现了准确、高效的特点。
In recent years,simultaneous-source acquisition technique has shown a broad application prospect in high-density and wide-azimuth seismic exploration.Based on the limited spatial bandwidth of seismic data,a direct inversion method for deblending simultaneous-source data was discussed in this paper.Different from conventional iterative algorithms with constraints,iteration is not required in this method.A basic point-spread matrix was added to the pseudo inverse of time-delay operator,and thus the direct separation of simultaneous-source data without iteration was realized in frequency domain.By modifying the basic point-spread matrix,this method was further extended to the separation of simultaneous-source data acquired with irregular receiver and shot arrays geometry.Theoretical model tests demonstrated that the method achieves good separation effect with high accuracy and efficiency when the deblending condition given in the paper is satisfied.
作者
王坤喜
毛伟建
张庆臣
李武群
詹毅
孙郧松
WANG Kunxi;MAO Weijian;ZHANG Qingchen;LI Wuqun;ZHAN Yi;SUN Yunsong(Center for Computational and Exploration Geophysics,Institute of Geodesy and Geophysics,ChineseAcademy of Sciences,Wuhan,Hubei 430077,China;State Key Laboratory of Geodesy and Earth's Dynamics,Wuhan,Hubei 430077,China;University of Chinese Academy of Sciences,Beijing100049,China;Research&Development Center,BGP,CNPC,Zhuozhou,Hebei 072751,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2020年第1期17-28,4-5,共14页
Oil Geophysical Prospecting
基金
国家重点研发计划项目“超深水海底飞行节点地震仪研发与油气勘探应用研究”(2018YFC0310104)
国家自然科学基金重点项目“宽方位高密度深层地震保幅成像新技术的应用研究”(U1562216)
中国石油天然气集团公司项目“深层与非常规物探新方法新技术”(2016A-33)联合资助.
关键词
同时震源
直接反演
不规则排列
点扩散矩阵
分离
simultaneous source
direct inversion
irregular array
point-spread matrix
deblending
