This study relates the results of an analysis of shale compaction in eight wells within the Northern Interior Basin of Gabon. The analysis, using sonic log derived interval transit times, was performed to aid in the interpretation of structural development within the Ndombo permit. The permit area is characterized by major growth faults, extensive erosion and multiple periods of deformation. The complicated geology, a lack of definitive palynologic markers and generally poor quality transition zone seismic data made conventional well and seismic correlation inadequate. It was hoped that the determination of shale compaction would allow estimates of erosion and stratigraphic position of sediments encountered in the wells to be made.


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