Abstract：The sea-land transition zone in Nanpu Sag of Bohai Bay Basin has a complex surface structure. As surface and underground and viscoelastic media are absorbed, the seismic wave energy is seriously attenuated, which results in the loss of seismic signal strength and frequency bandwidth. In order to improve imaging accuracy, it is necessary to compensate for the attenuation of seismic wave energy in stratum. Inverse Q filtering and time-frequency analysis methods fail to consider the propagation path of seismic waves, but the energy attenuation of actual seismic waves is closely related to the propagation path. Therefore, the seismic imaging method based on Kirchhoff pre-stack depth migration is adopted. In the migration process, the energy attenuation of seismic waves propagating along different paths is considered, and the migration imaging quality is improved in terms of energy localization and attenuation compensation. In addition, Q pre-stack depth migration is utilized, and a Q model is obtained by using the Q tomography method. Furthermore, Kirchhoff pre-stack depth migration imaging is performed based on the Q model, which effectively compensates for amplitude and corrects phase distortion, improves the signal-to-noise ratio, fidelity, and structural interpretation accuracy of deep data, and provides a reliable basis for pre-stack inversion, lithology identification, and fluid detection.
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