Application of frequency-domain waveform inversion method in Marmousi shots data |
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Authors: | Meng Wang Dong Zhang Di Yao Qianqing Qin Lin Xu |
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Institution: | School of Physics and Technology, Wuhan University, Wuhan 430072, Hubei, China; 2. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensoring/Wuhan University, Wuhan 430072, Hubei, China; 3. RIPED, China National Petroleum Corporation, Beijing 100082, China |
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Abstract: | Frequency-domain waveform seismic tomography includes modeling of wave propagation and full waveform inversion of correcting the initial velocity model. In the forward modeling, we use direct solution based on sparse matrix factorization, combined with nine-point finite-difference for the linear system of equations. In the waveform inversion, we use preconditioned gradient method where the preconditioner is provided by the diagonal of the approximate Hessian matrix. We successfully applied waveform inversion method from low to high frequency in two sets of Marmousi data. One is the data set generated by frequencydomain finite-difference modeling, and the other is the original Marmousi shots data set. The former result is very close to the true velocity model. In the original shots data set inversion, we replace the prior source with estimated source; the result is also acceptable, and consistent with the true model. |
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Keywords: | preconditioned gradient method frequency-domain waveform inversion Marmousi shots data |
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