Fast first-arrival traveltime tomography of diving waves under rugged surface and its application to static correction
YANG Hua-Chen1,2(), GE Da-Ming1, WANG Zhong-Cheng1,2, WANG Lei1, YUAN Yong-Qi1
1. Geophysical Research Institute,Shengli Oilfield Company,SINOPEC,Dongying 257022,China 2. Working Station for Postdoctoral Scientific Research of Shengli Oilfield,Dongying 257000,China
Ray tracing-based first-arrival traveltime tomography is widely used to construct near-surface velocity models to achieve the static correction of seismic data from complex near surface.However,this method necessitates the calculation of ray paths for first-arrival traveltimes and the iterative updating of initial velocity models.As a result,significant computational time is required when applying this method to measured 3D high-density seismic data.To address this issue,this study proposed a method for quickly building 3D near-surface velocity models utilizing diving wave traveltimes under rugged surface.Specifically,based on the ray and traveltime equations of diving waves corresponding to velocities subjected to lateral and vertical changes under rugged surface,the velocity distribution from the observation surface downward was determined using common offset gathers.The proposed method eliminates the need for ray tracing and iterative updates of initial velocity models,offering high modeling efficiency.Tests based on data from theoretical models verified the effectiveness of the proposed method.When applied to measured 3D seismic data,the proposed method yielded static correction results comparable to those obtained using the Fresnel-volume first-arrival traveltime tomography while significantly improving computational efficiency.
杨华臣, 葛大明, 王忠成, 王磊, 袁永祺. 三维起伏地形下回折波快速走时层析及其静校正应用[J]. 物探与化探, 2025, 49(2): 441-450.
YANG Hua-Chen, GE Da-Ming, WANG Zhong-Cheng, WANG Lei, YUAN Yong-Qi. Fast first-arrival traveltime tomography of diving waves under rugged surface and its application to static correction. Geophysical and Geochemical Exploration, 2025, 49(2): 441-450.
Zhang L, Yang Q Y, Zhang B, et al. Tomography inversion by first breaks in areas with complex near surface[J]. Progress in Geophysics, 2017, 32(2):816-821.
Yu H. Applicability analysis of refraction static correction and tomographic inversion static correction[J]. Progress in Geophysics, 2012, 27(6):2577-2584.
[3]
Cox M. Static corrections for seismic reflection surveys[M]. Tulsa: Society of Exploration Geophysicists, 1999.
Zhou Y, Rao Y. Tomographic static corrections in loess plateaus[J]. Chinese Journal of Geophysics, 2019, 62(11):4393-4400.
[5]
Shi T K, Zhang J Z, Huang Z L, et al. A layer-stripping method for 3D near-surface velocity model building using seismic first-arrival times[J]. Journal of Earth Science, 2015, 26(4):502-507.
Huang M Z, Feng Z Y, Zhou D T. Direct statics iterated in shot and receiver domains and its application[J]. Progress in Exploration Geophysics, 2008, 31(2):122-128,87.
Xiao Y X, Yang H S, Cui S T, et al. An efficient refraction statics method for massive seismic data[J]. Oil Geophysical Prospecting, 2019, 54(4):768-774,722.
Wang K B, Zhao L Z, Zhang X M. Application of refraction statics in 3-D data processing in Sulige gas field[J]. Geophysical Prospecting for Petroleum, 2003, 42(2):248-251.
Fang Y, Luo W S, Jiang C P, et al. Application of tomographic static correction method for Kuqa mountain seismic data[J]. Oil Geophysical Prospecting, 2017, 52(S1):23-27.
Hao P L. Research on application of first break picking and tomographic static correction of complex surface based on deep learning[D]. Beijing: China University of Petroleum (Beijing), 2023.
[12]
Palmer D. The generalized reciprocal method:An integrated approach to shallow refraction seismology[J]. Exploration Geophysics, 1990, 21(1/2):33-44.
Jing X L, Yang C C, Li Y M, et al. A global optimized algorithm for seismic residual statics corrections[J]. Chinese Journal of Geophysics, 2002, 45(5):707-713.
[14]
Zhang J Z, Shi T K, Zhao Y S, et al. Static corrections in mountainous areas using Fresnel-wavepath tomography[J]. Journal of Applied Geophysics, 2014, 111:242-249.
[15]
Gibson B S. Nonlinear least-squares inversion of traveltime data for a linear velocity-depth relationship[J]. Geophysics, 1979, 44(2):185.
[16]
Yang H C, Zhang J Z, Ren K, et al. First-arrival traveltime inversion of seismic diving waves observed on undulant surface[J]. Geophysical Journal International, 2021, 225(2):1020-1031.
[17]
Jin C K, Zhang J Z. Stereotomography of seismic data acquired on undulant topography[J]. Geophysics, 2018, 83(4):U35-U41.