Lithologic Reservoirs ›› 2021, Vol. 33 ›› Issue (5): 132-139.doi: 10.12108/yxyqc.20210512

• EXPLORATION TECHNOLOGY • Previous Articles     Next Articles

High precision combined residual static correction method and its application

XU Xingrong, SU Qin, SUN Jiaqing, ZENG Huahui, XIAO Mingtu, LIU Mengli   

  1. PetroChina Research Institute of Petroleum Exploration and Development-Northwest, Lanzhou 730020, China
  • Received:2021-01-20 Revised:2021-04-23 Online:2021-10-01 Published:2021-09-30

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Abstract: The residual static correction method is usually used to eliminate the influence of medium and short wavelength on imaging after solving the basic static correction, but a single residual static correction method cannot completely solve the problem. Based on surface-consistent residual static correction theory, the residual static correction method of space variant multi-time window fusion was used to build space variant model trace. The multi-scale frequency division residual static correction method was used to eliminate the effect of frequency on model trace, and a time-varying residual static correction method based on common imaging point(CIP) gathers was adopted in imaging gathers. The high precision combined residual static correction scheme integrated of the three residual static correction methods was tested in complex structural area with wide azimuth, wide frequency and high density. The results show that the scheme not only considers the calculation efficiency, but also improves the calculation accuracy. The scheme can effectively solve the problem of residual static correction in low SNR and complex structure area with "two widths and one height".

Key words: residual static correction, space variant, multi-time window, multi-scale, common imaging point

CLC Number: 

  • P631.4
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