State-owned oil firm Petrochina has reissued tenders for an engineering, procurement and construction (EPC) contract for the upgrade of a processing facility at the Halfaya oil field in the southeast of Iraq.

Issued on 6 March, bids are due on 6 April for the brownfield central processing facility (CPF).

The deal covers improvements to CPF-1 at the field.

The phase 2 CPF is expected to be commissioned in 2015, by China Petroleum Engineering & Construction Corporation, doubling the field’s production capacity to 200,000 barrels a day (b/d), from 100,000 b/d currently.

Phase 3 facilities are still in the design stage by the UK’s Mott MacDonald. These will include new well pad clusters, an oil-gathering system, a third CPF and storage tanks.

The Halfaya consortium, which includes China National Petroleum Corporation (CNPC), Malaysia’s Petronas, France’s Total and state-owned Missan Oil Company, plans to more than double the production again in phase 3 to reach the 535,000 b/d plateau by 2017.