The additions of oil and gas reserves through enhance oil recovery (EOR) projects and or finding new exploration plays are challenging nowadays. Reserve replacement ratio is far from ideal condition especially for mature PSC in Indonesia. Low oil price environment worse this condition by decreasing revenue for operator. Both exploration and EOR will require three to five years to add reserves and improve the oil and gas production rate. In another hand, marginal fields which still have remaining reserves and the potential for production are less considered for development. Integrated and careful scenario should be arranged to deal with.
TBA Field is an offshore field located in Salawati Kepala Burung Block, West Papua Province, Indonesia. It was discovered in 1975 and had been producing since 2006. From the initial data, this field was expected to produce up to 4.32 MMBO from 9 MMBO OOIP. Current recovery factor is around 45%. There are 3 wells on this field, with two actives and one already been P&A. TBA Field was closed in 2010 with the last oil production 1,250 BOPD from 1 well. The remaining reserves and production profile TBA became unattractive for contractor's due to high cost for the rental of Floating Production Storage & Offloading (FPSO) facilities. TBA wells are produced through well–to-well gas lift. This method can increase the daily production of TBA field. In addition, the use of gas lift to minimize pressure loss along the wellbore can extend the life of the well and increase the cumulative recoverable reserves. Thus, this field is more soundly in economic for reactivation.
This paper will concern on how to reactivate the two wells in the TBA field by considering remaining reserves, recovery factor, production forecast, optimizing gas lift operation, and economics. To be more fruitful, sensitivity for FPSO daily rental cost and oil price will be added in the discussion part.