The Gajah Baru-2 well is an appraisal of the Gajah Baru-1 discovery well, which was drilled by Premier in 2000 and which successfully proved gas in stacked reservoirs in the Arang formation.
The results of this new well have exceeded pre-drill expectations and Premier estimates that recoverable reserves for the Gajah Baru field have increased to approximately 325 billion cubic feet, equivalent to 54 million barrels of oil (mmboe).
Gajah Baru-2 was spudded on September 18th by Diamond Offshore's Ocean Sovereign and was drilled to a target depth of 9,010 ft. The well encountered gas bearing Miocene reservoirs (Arang formation) and, in deeper horizons, gas in Oligocene sands (Gabus formation). The top section of the well was drilled to a depth of 2,214 ft with 13 3/8' casing using a 'casing-while-drilling' technique, establishing a new world record for this method.
The Gajah Baru field is located 25 km from the existing Anoa field which is also in the Premier operated West Natuna block A. Gas from West Natuna is sold to Singapore under a 27 year gas sales contract in conjunction with other production sharing contracts through the West Natuna Transportation System gas pipeline. When signed in 1999, contract deliveries were expected to be 325 million cubic feet of gas per day (mmscfd) of gas (block A share 120 mmscfd), and current volumes exceed these levels.
Premier is the operator of West Natuna block A with a 28.67% interest, and the other partners in the block are Kufpec (33.33%), Amerada Hess (23%) and Petronas (15%).
Charles Jamieson, Chief Executive of Premier, said:
'This well has proved a larger recoverable gas volume on the block which gives us opportunities to optimize the future development of the West Natuna project and reduce costs, as well as increasing confidence of meeting additional gas demand in Singapore.'
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