Sisi-Nubi development: sand control strategy and implementation
Year: 2010
Proceedings Title : Proc. Indon. Petrol. Assoc., 34th Ann. Conv., 2010
The sand control strategy and its implementation in Sisi-Nubi field illustrate the importance of continuous improvement to optimize results. The paper will go through the lessons learned and challenges encountered in the process. Sisi-Nubi is a gas field operated by Total E&P Indonesie in partnership with Pertamina and INPEX and situated 25 km offshore of the modern Mahakam Delta with water depths of 60-90m. The reservoirs in Sisi-Nubi are multi-layered Upper Miocene deltaic deposits and are spread out in an almost 2000m (1900-3800mSS) interval with two distinctive characteristics: poorly consolidated sands in the upper part and relatively poor to tight sands in the deeper. Field development phase-1 includes the drilling of 27 development wells in which most of the targeted reservoirs require sand control application. The strategy developed in sand control utilizationincludes: core analysis to define the optimum limit of sand control requirement, regular sonic logging to further optimize sand control application depth limit, optimize zones to be completed, trial of alternative sand control methods. As per November 2009, 21 wells have been drilled and 20 of them are in production. A step by step approach and detailed completion preparation results in successful sand control application. The limit of sand control has been carefully pushed shallower, non-treated reservoirs appear to remain consolidated so far. No sand production has been observed at surface. Continuous improvement in sand control application has been achieved and enhanced by effective integration of sub-surface knowledge and innovative completion techniques.
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