Australia's Santos Ltd., operator of the Northwest Natuna Production Sharing Contract (PSC) in the Natuna Sea offshore Indonesia, achieved excellent flow rates in the drilling of the AAL-4XST1 appraisal well for the Ande Ande Lumut (AAL) oil project, joint venture partner AWE Ltd. reported Tuesday.
The operator conducted a successful Drill Stem Test (DST) on the G Sand reservoir at the AAL-4XST1 appraisal well using the Raniworo (345' ILC) and achieved an averaged stabilized flow rate of 828 barrels of oil per day (bopd) on a 64/64 inch choke over a 9 hour period. The results exceeded pre-drill expectations and are 58 percent higher than the previous G-sand tests at AAL-3X (525 bopd).
Wellsite measurements indicate the G-sand oil has a specific gravity of 10.7 API at 60 degree Fahrenheit, consistent with previous samples from AAL-3X. AWE’s preliminary analysis of the wireline log data indicates a 26 foot (8 meter) oil column in the G-Sand and excellent quality reservoir -- the best encountered in the field to date. No oil-water-contact was intersected in the well. Santos is now planning to commence a second DST test in the main AAL field K-sand reservoir.
“The better than expected flow rates achieved and excellent reservoir quality underline the significant potential of the AAL oil project. The positive results of the G-sand DST, together with a forecast lower cost environment and an improving long-term outlook for the oil price are all encouraging in respect of a decision to develop the AAL field,” AWE Managing Director and CEO, David Biggs, said in the press release.
Appraisal of the G Sand reservoir, which is estimated to contain 289 million barrels gross oil in place with 36 million barrels gross recoverable oil, will facilitate the preparation of a Plan of Development for this resource, which could be developed in conjunction with the already approved K Sand development.
Santos and AWE each hold 50 percent interest in the Northwest Natuna PSC.
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