NORTHWEST NATUNA ASSET
Asset Overview
Operatorship
Prima Energy Northwest Natuna Pte Ltd operates this working area.
Asset
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Ande - Ande Lumut (AAL) area, located inside of Northwest Natuna asset, is one of the largest undeveloped oil discoveries in Indonesia. It is located in shallow water (~70 m) of Northwest Natuna, at depths of ~1,100 m.
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Northwest Natuna has an area of 461 km² and is located approximately 260 km (145 nautical miles) north-northwest of Matak in the Anambas Islands, 510 km northeast of Singapore and Batam, and 1,300 km north of Jakarta. It is located next to the Malaysian border in shallow waters (less than 70 m deep) and contains the AAL oil discovery and several other prospective structures.
ANDE-ANDE LUMUT AREA
Reserves & Resources
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The technology of geo-steered horizontal drilling, coupled with the latest completion equipment (screens, ICDs etc) make this heavy oilfield fully viable.
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42.7 MMSTB of oil is expected to be produced under this technology, as approved by the current AAL development plan.
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Surrounding the AAL area are several prospects with significant potential resources for future development.
Production
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Development of the AAL oilfield is currently underway to obtain first oil by the end of 2026. A Central Production Platform (CPP) will be installed, connected to a bridge-linked and spread-moored Floating Storage Offloading (FSO) vessel.
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Synergies between Prima Energy and marine operations create a real operational experience and significant savings opportunities.
Other Areas
The Northwest Natuna Area contains a number of low-risk prospects. For example, immediately to the west of AAL, there are structures such as Inu Kertapati and Nakulo. These are likely to contain extensions of the AAL oil accumulation.
Further to the southwest of AAL is the Kirana Prospect. This lies immediately east of Malaysia’s East Belumut Oilfield. Kirana has multiple reservoirs capable of trapping oil and gas and it is well-placed to have received oil and gas from surrounding areas. 
Timeline
2024
PoD for Ande-Ande Lumut oilfield revised
Prima Energy received the final approval from SKK Migas and from the Ministry of Energy and Mineral Resources for the revised plan.
2023
Prima Energy acquired New Northwest Natuna asset
The 100% acquired happen on 13 July 2024 through Prima Energy Northwest Natuna Pte. Ltd. (50%) and Prima Energy AAL Singapore Pte. Ltd. (50%).
2019
Northwest Natuna asset
Santos sold 50% ownership back to AWE (Northwest Natuna) Pte. Ltd. (part of Mitsui).
2013
Northwest Natuna asset
Santos acquired 50% participating interest and operatorship of Northwest Natuna PSC.
2012
Northwest Natuna asset
AWE (Northwest Natuna) Pte. Ltd. acquired 100% of Northwest Natuna asset.
2011
AAL PoD I
Approved by the Minister for Energy & Mineral Resources of Republic of Indonesia.
2006
AAL-2X and AAL-3X
Explored by GONPL
2004
Northwest Natuna asset
The Northwest Natuna asset was awarded to Genting Oil Natuna Pte. Ltd.
2000
AAL-1X
Explored by Premier Oil
Oilfield Appraisal
The AAL area is a seahorse-shaped accumulation, approximately 8 km N-S x 4 km E-W which divided into southern, central, and northern segments.
Four wells have delineated on this discovery: AAL-1X drilled in 2000, AAL-2XR and -3X drilled in 2006, and AAL-4X drilled in 2016.
As a result, 3 wells in the central part and 1 well in the south of the discovery have successfully been tested.
Plan of Development
The original AAL Plan of Development (PoD) was approved by SKK Migas in 2011. Prima Energy has now revised the PoD to incorporate new concepts and technologies. The revised plan outlines a staged field development, with Stage 1 already agreed upon.
Heavy oil development is nothing new, but not without challenges. For the AAL area, the challenges include managing the water and sand production, fully understanding the long-term recovery potential of the reservoir, and how best to achieve optimum production.
Our staged development is tailored to address these challenges, while maximizing future value. The initial Stage 1 development will focus on producing from the K Sand (up to 6 wells), including one well to test the G Sand oil.
The approved development plan targets first oil from the AAL Stage 1 development in late 2026. To achieve this, the plan involves building an offshore central production platform (CPP), drilling wells from this platform to produce up to 20,000 barrels of oil per day, and converting a suitably sized tanker into an FSO.