Abu Dhabi has tendered the two main engineering, procurement and construction (EPC) packages on the second-phase development of its offshore Nasr oil field development, according to sources active on the project.

Project owner Abu Dhabi Marine Operating Company (Adma-Opco) is carrying out a full field development of Nasr, which is located in the Gulf 30 kilometres to the northeast of the company’s active Umm Shaif field.

Adma-Opco has asked prequalified companies to submit technical EPC bids for the estimated $500m first package – covering pipelines and associated facilities – by 17 December.

Companies prequalified for the first package include US-based McDermott, Abu Dhabi’s National Petroleum Construction Company (NPCC), UK-based Petrofac, Italy’s Saipem and South Korean group Samsung Engineering.

For the estimated $1bn-plus second package, which includes the construction of platforms, wellheads and associated facilities, contractors have been asked to submit technical proposals by 24 December.

Companies prequalified for the second package include South Korean groups Daewoo Shipbuilding & Marine Engineering (DSME), Hyundai E&C, Hyundai Heavy Engineering (HHI) and Samsung Engineering, US-based Fluor, McDermott and Saipem.

Contractors submitting successful technical bids will then be asked to post commercial proposals for the packages, with contract awards expected in the first half of 2014.

The Nasr full field development – the second phase of the Nasr expansion – also includes two more packages, for early works and brownfield works respectively, according to a source active on the project.

Nasr phase one, the early production facilities, is currently under execution. The EPC contract was awarded to India-based contractor Larsen & Toubro in 2011.

The project forms part of Adma-Opco’s plan to add 400,000 barrels a day (b/d) of production capacity by 2020 from several offshore field developments, including Nasr, Satah al-Razboot (Sarb) and Umm al-Lulu.

The operator has awarded several contracts on the Sarb and Umm al-Lulu full field developments earlier in 2013, with both projects in the execution phase.

Adma-Opco is majority-owned by the state-run Abu Dhabi National Oil Company (Adnoc), with minority stakes held by UK-based BP, France’s Total and Japan Oil Development Company (Jodco).