Publications

Identifying detailed stratigraphic patterns at the reservoir scale is challenging, especially in complex fields like Suban, where multi-aged carbonates interact with clastic reservoirs. Both carbonate and clastic intervals significantly contribute to production, as demonstrated by well data that reveals complex lithology configuration. Understanding the geometry and connectivity of these reservoirs is critical for accurate hydrocarbon volumetrics, field pressure management, and optimized drainage patterns, directly influencing field development strategies.

To address these challenges, seismic facies analysis and pattern recognition techniques were applied. Seismic data acquisition occurred twice, with three processing stages for the most recent acquisition (2018-2019). However, initial reprocessing efforts alone failed to clearly reveal lateral facies geometry. Additional post-processing, including a combination of seismic attributes and seismic resolution cube, was undertaken to enhance lateral deposition patterns. Impedance inversion and discontinuity data were complemented by spectral decomposition to improve the clarity of seismic interpretation. The combination of all the methods improved the amount of geological information that can be extracted from the seismic. Well data anchored the interpretations, and comparisons with published findings served as reality checks.

Impedance inversion volumes revealed down-lapping patterns that delineate carbonate body limits in the western and central areas. Mounded features in the carbonate sequence suggest multiple back-stepping episodes, with the youngest carbonate layer identified as the field’s most productive reservoir. In the eastern and southeastern regions, onlapping seismic patterns against a paleo-high reflect clastic deposits, while geo-body extractions in the southeast further delineate bar systems within the clastic units. Seismic resolution cube suggests a lateral boundary between paleo carbonate deposition and clastics system. Despite the depositional complexity, this integrated seismic approach has been instrumental in refining reservoir configurations in the Suban field, providing a strong foundation for future development decisions.