【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。更多还原

【Abstract】 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.更多还原