Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (2): 343-349.doi: 10.13278/j.cnki.jjuese.20170264

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Computation of Seismic Traveltimes and Raypath Based on Model Parameterization

Sun Jianguo, Li Yilong, Sun Zhangqing, Miao He   

  1. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China
  • Received:2017-08-14 Online:2018-03-26 Published:2018-03-26
  • Supported by:
    Supported by National Natural Science Foundation of China (41274120, 41404085) and Outstanding Young Teacher Training Program of Jilin University (419080500337)

Abstract: The establishment and description of the model is the basis of seismic data analysis and processing, and the reasonable model parameterization method has achieved good results for all aspects of seismic forward and inversion. Ray tracing plays an important role in the fields of forward modeling, tomography, and migration. The authors studied the ray tracing method, designed a model of least squares parametric method,parameterized the model of velocity and travel time respectively, and then tested it by using the velocity gradient model and error analysis. The results show that the model parameterization improves the precision of travel time calculation and the tracking ray path. The validity and applicability of the model parameterization method are proved by the example of the classical Marmousi model and the Sigsbee 2A model.

Key words: model parameterization, travel time calculation, track ray path, least squares

CLC Number: 

  • P631.4
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