2023 Formation Evaluation Consortium

Summary of Research

We introduce effective techniques for interpreting and processing monopole sonic waveforms within heterogeneous formations. Our approach is applied to High-angle (HA) wells with existing bed boundaries. We utilize a 3D Eikonal-based fast sweeping method to decipher complex acoustic logging responses and implement a 2D adjoint-state first-arrival traveltime (FAT) tomography to estimate true formation slowness and bed-boundary positions. This approach has other potential applications, such as hydraulic fracturing estimation.

This method enhances both accuracy and efficiency in evaluating formation heterogeneity around boreholes. Our future agenda includes expanding to 3D FAT tomography, encompassing all receivers, developing an efficient phase picking method for integration into field data processing, and accommodating anisotropy within the fast sweeping method.

Some photos