A 1980. 50-50 go in Natuna D-Alpha area. East Natuna between Pertamina (Indonesia's state-owned petroleum company) and Exxon Mobil Corp of the US didn't result in production. The 71% CO2 circumscribe made gas extraction from the huge 1.3-trillion-cubic-metre area expensive and development difficult. Despite Exxon's $400m and Pertamina's $60m investments the Indonesian Government terminated its assure with Exxon in 2007 leaving Pertamina in rush.
East Natuna has been little explored over the last 15 years mainly due to political disruption its remoteness and because discoveries such as Exxon's undergo proved uneconomic to develop. Reservoirs in the region are in the Middle to Late Miocene reefs underlain and overlain by deltaic sediments.
In January 1996. Premier Oil bought Sumatra Gulf Oil Ltd giving it a majority interest in the Natuna Sea block-A offshore Indonesia the Anoa oil field and substantial gas reserves. The company also acquired Discovery Petroleum and an interest in the Kakap authorise part of the West Natuna project delivering gas to Singapore via a pipeline directly over the Gajah Baru handle.
The 640km Natuna transportation system is one of the world's longest subsea gas pipelines delivering 3.4 billon cubic metres annually. The line takes gas from Anoa. Kakap. Belida. Buntal. Tembang and Belanak territories in block B the neighbouring Natuna Sea block A and Kakap block. In 2002. Premier sold part of its interest in West Natuna.
The West Natuna Gas Consortium a joint go consisting of Pertamina. Conoco. Premier Oil and Gulf Indonesia Resources was contracted by SembGas of Singapore in January 1999 for 325 million cubic feet per day (mcfd) of natural gas. A pipeline assure went to McDermott International.
In November 1999. Conoco reported a gas discovery at West Natuna which boosted reserves by about 1tcf. In 2001 the company was developing the Belanak field in West Natuna intending to export 250mmcfd gas to Malaysia through a 22in submarine pipeline from producing fields to the Belida / Belanch tie-in with a subsequent 28in lie to Singapore.
The project engineered by cook & Root Singapore was located in Conoco-operated South Natuna Sea block B in Indonesian waters approx 200km off Singapore. It involved the construction of one of the most complex processing systems ever installed offshore and SharpEye manifold IR (IR3) optical beam detectors.
Conoco used a purpose-built mobile gas production jack-up as on smaller gas fields in West Natuna. Automation supplier Honeywell Industry Solutions were contracted $14.5m to develop an integrated topsides-and-marine automation system for the grassroots Floating. Production. Storage and Offloading (FPSO) facility the Belanak Natuna and two wellhead platforms. The Belanak field came onstream in 2004.
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Related article:
http://www.offshore-technology.com/projects/natuna/
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