Improved High-resolution Model Building by Layer-striping Tomography

This technical report presents a case study on the application of layer-striping tomography to improve high-resolution and accurate model building in the context of the Dai Hung Nam (DHN) discovery in Block 05.1a, Nam Con Son Basin, offshore Vietnam. The study addresses the challenges faced due to the failure of a third appraisal well, which necessitated a shift to marginal development. The report details the seismic reprocessing techniques employed to enhance image quality and resolve issues related to thin, tight, and low-permeability reservoir properties. It outlines the methods used for depth imaging, including the anisotropic Kirchhoff pre-stack algorithm, and highlights the improvements in hydrocarbon volume estimates for various sub-blocks. The findings indicate significant increases in resource estimates, supporting the decision to proceed with the final appraisal well. The report concludes by emphasizing the ongoing utility of the seismic dataset for well design and further interpretation studies.