Abstract：Conventional isotropic reverse time migration(RTM) method can lead to inaccurate imaging and unfocused seismic event energy when dealing with the anisotropic problem,and the strong amplitude and low frequency noise in the RTM imaging results cannot be completely removed by simple filtering methods such as Laplace filter operator.In order to solve these problems,we apply acoustic approximate equation to simulate the wavefield propagation of qP wave in VTI medium,eliminate the influence of qSV wave through setting smooth isotropic or elliptic anisotropic source ring at source locations.On this basis,the angle domain common imaging gathers(ADCIGs) superposition implementation strategies of RTM in VTI medium has been developed,which use the superposition of imaging results with different angles in ADCIGs to suppress the low-frequency noise and improve the imaging precision.Model tests and real dataset examples verify that the proposed approach can obtain the accurate imaging in complex steep structures with better energy balance and lower low-frequency noise.
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