Advances in Earth Science ›› 2014, Vol. 29 ›› Issue (10): 1138-1148. doi: 10.11867/j.issn.1001-8166.2014.10.1138

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Research Status and Development Trend of Near-Surface Velocity Modeling

Zhenyu Wang 1, 2, Qinyong Yang 1, Zhenchun Li 2, Guanghui Hu 1, Li Yin 1, 2, Jie Wang 1   

  1. 1.Sinopec Geophysical Research Institute, Nanjing 211103, China
    2.School of Geosciences, China University of Petroleum, Qingdao 266580, China
  • Online:2014-10-20 Published:2014-10-20

Zhenyu Wang, Qinyong Yang, Zhenchun Li, Guanghui Hu, Li Yin, Jie Wang. Research Status and Development Trend of Near-Surface Velocity Modeling[J]. Advances in Earth Science, 2014, 29(10): 1138-1148.

Seismic velocity is a critical factor in reflecting underground structure and lithology. The accuracy of near-surface velocity directly influences the results of static correction, velocity analysis and the final imaging in exploration areas. Near-surface modeling methods and technologies commonly used are based on the ray theory of high-frequency approximation, which barely meet the highaccuracy request in current nearsurface modeling. Through an overall investigation into nearsurface modeling technologies such as micro logging, mini refraction, surface wave method, traveltime tomography and Full Waveform Inversion (FWI), this paper summarizes their adaptability, advantages and disadvantages, research and application status, points out that by combining traveltime tomography and waveform inversion, the step-by-step and multiscale inversion strategy in the time domain is an effective means and trend of near-surface high-accuracy modeling, which can improve modeling accuracy effectively and meet the requirements of high accuracy imaging. Thus, the method has widespread application prospects in near-surface mineral prospecting, engineering geophysics and hydrocarbon exploration.

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