Abstract
Located offshore East Kalimantan, Indonesia, the Serang Field consists of complex multi-layered reservoirs with strong aquifers and large gas caps. The dynamic change of fluid distribution and saturation in these reservoirs due to production poses a unique challenge for managing and developing the field. Issues important for reservoir management involve locating and defining fluid contacts, optimizing well placement and their timing, selecting proper completion techniques, and identifying potential workover candidates to capture additional recovery.
This paper presents a field case study describing the use of reservoir modeling to assist operations to manage and optimize the Serang field development. The model constructed helps explain the reservoir fluid flow behavior, its production characteristics, and is subsequently used to plan for the field development strategy. Based on modeling results, value-based recommendations are made with focus on selecting optimal infill locations, completion techniques, wellbore placement and timing, identifying workover candidates and recompletion potential, and forecasting flow rates and reserves. Results from current development drilling program with emphasis on using horizontal wells for improving recovery under gas-cap gas and strong aquifer support are presented. Specific strategy used in planning and completing these horizontal wells is also discussed.
The paper demonstrates that reservoir modeling as an integral part of the asset team, plays an important role for technical decision, bridges communication between cross-disciplined team members and becomes a useful forecast tool to help manage the asset and increase its value.
