Abu Dhabi has for the second time extended the deadline for proposals to build a plant to process gas produced at the Al-Dabbiya oil field, according to sources familiar with the contact.

Project owner Abu Dhabi Company for Onshore Petroleum Operations (Adco) has asked for technical engineering, procurement and construction (EPC) bids to be submitted on 24 May. The previous deadline was 26 April.

Adco told contractors it had extended the cut-off date just 24 hours before bids were due to be submitted, sources told MEED.

Several international engineering companies have been prequalified to bid on the tender, which was floated by Adco in January. The plant has a planned capacity to process about 250 million cubic feet a day (cf/d).

Prequalified companies are understood to include:

Adco is currently carrying out the third-phase expansion at the Al-Dabbiya oil field, which lies in a coastal shallow and deep marine area to the southwest of Abu Dhabi city.

The EPC contract was awarded to Italy’s Tecnimont in the final quarter of 2014 in a deal worth $2.3bn.

Adco is a joint venture of Abu Dhabi National Oil Company, France’s Total (10 per cent), Japan’s Inpex (5 per cent) and South Korea’s GS Energy (3 per cent). The onshore operator is expected to award more stakes to bring the interest held by international oil companies to a total of 40 per cent.