A direct inversion method for deblending simultaneous-source data [同时震源数据的直接反演分离]

作者：Wang K.; Mao W.^*; Zhang Q.; Li W.; Zhan Y.; Sun Y.

来源：Oil Geophysical Prospecting, 2020, 55(1): 17-28.

DOI：10.13810/j.cnki.issn.1000-7210.2020.01.003

• Deblending
• Direct inversion
• Irregular array
• Point-spread matrix
• Simultaneous source

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.

• 单位
  大地测量与地球动力学国家重点实验室; 中国科学院大学