Carbonate reservoir fracture prediction by using pre-stack and post-stack seismic techniques in Nanpu2 buried-hill

Based on wide-azimuth seismic data and drilling data, the seismic comprehensive prediction of Ordovician heterogeneous carbonate fracture-carst reservoir was conducted in the top of Nanpu2 buried-hill.On the basis of seismic data amplitude-preservation processing, the surface layer and fracture pattern of Nanpu2 buried-hill is identified by fine structure interpretation. Meanwhile, the P-wave azimuth anisotropy analysis technique is used to carry out pre-stack fracture prediction and curvature attribute is adopted to carry out post-stack fracture prediction. Moreover, post-stack attenuation gradient is utilized to detect the distribution of caves. By comparing the pre-stack and post-stack prediction results, combined with FMI imaging logging interpretation result and drilling data, we proved the correctness of our research clue and the effectiveness of the prediction methods. The comprehensive prediction results provide a basis for identifying the potential target area of Ordovician carbonate reservoir in the Nanpu2 buried-hill.