Publications

This research evaluates the production potential of Low-Quality Reservoirs (LQR) in South Sumatra Basin, as an innovative response to the decline of High Quality Reservoir in Karangan Field. Utilizing integrated data from core samples, Formation Micro Imager and well logs, the study to identify a bioturbated sandstone intervals as key sweet spots for hydraulic fracturing stimulation. These intervals, enriched by Glossifungites and Zoophycos trace fossils, exhibit improved reservoir quality with porosity ranging from 12–14% and permeability exceeding 10 mD. Stratigraphic analysis reveals coarsening-upward sand lobes, characteristic of lower shoreface deposition, with significant lateral continuity that enhances hydraulic fracturing efficiency. The dual-porosity and dual-permeability systems within the bioturbated sandstones enable optimal fluid flow and connectivity. The study emphasizes the importance of sedimentological and petrophysical analyses in optimizing LQR production and recommends advanced modeling and seismic attribute studies for future field development.