Abstract：S-wave is separately processed with P-wave approaches in the conventional multi-wave data processing, which ignore elastic vector characteristics of seismic wave, and its imaging is critically dependent on the accuracy of the wavefield separation. In this paper, we propose an integrated approach for multi-wave depth model building and imaging. First we provide the back propagating formula of elastic wavefield decoupling of P- and S- waves for prestack depth migration, then construct the least square inversion equation of elastic wave to realize the reflection tomography based on Gaussian beam ADCIGs (angle domain common imaging gathers). In this way, depth migration and reflection tomography are integrated in the same processing flow. The former can provide ADCIGs and imaging quality control; and the latter can provide the final velocity model. Iterations between them form the integration approach of depth model building and imaging. Examples of model and real dataset validate the correctness and practicability of the proposed approach.
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Qin Ning, Wang Yanguang, Yang Xiaodong, Shan Lianyu, Liang Hongxian, Wang Changbo. Integration of multi-wave depth model building and imaging. OGP, 2016, 51(1): 127-134.
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