In terms of seismic pore pressure prediction, the relatively low spatial resolution of the conventional velocity-based methods makes them difficult to use for drilling operations. In this paper, we use the impedance inversion to directly compute pore pressure, thus avoiding the additional, potentially error-prone step of converting impedance to velocity and density. Meanwhile, a rock physics method is used to handle the situation of rare calibration pressure data when constructing the normal compaction trend, and a target-oriented scheme for overburden pressure prediction is proposed to achieve a high-precision result. We then apply this method to a shale gas reservoir to test its efficiency.


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