Abu Dhabi Gas Industries (Gasco) has tendered two packages on its estimated $1bn Integrated Gas Development (IGD) expansion scheme, according to sources close to the project.

The scheme is aimed at expanding the volume of gas from Abu Dhabi’s offshore fields processed at Gasco’s onshore operations at Habshan.

The new project is an extension of Gasco’s completed $11bn IGD scheme – one of the biggest UAE oil and gas projects of the last decade – will add an additional 200-400 million cubic feet a day (cf/d) of gas processing capacity.

Gasco has asked companies to submit technical engineering, procurement and construction (EPC) bids for the respective offshore and onshore pipelines, with the deadlines set for the first week of August, sources told MEED.

The proposed offshore pipeline will transport gas from the Das Island processing facilities to landfall at Ras al-Qila.

The 107-kilometre, 42-inch onshore pipeline will pump gas from the coast to Gasco’s onshore Habshan processing hub, where it will enter the UAE’s domestic gas network.

The new infrastructure will run parallel to the existing Onshore Associated Gas (OAG) pipeline to a point near Habshan and continue to another established pipeline corridor to Habshan 5.

Abu Dhabi Gas Liquefaction Company (Adgas) is expected to tender an EPC package later this year to build a gas treatment plant on Das Island that will connect to Gasco’s offshore pipeline.

The front-end engineering and design (feed) work for the IGD expansion has been completed by US engineering company Fluor.

The IGD is part of Abu Dhabi’s significant investment programme to boost gas supplies to meet growing demand.

The original IGD project, a joint scheme of Gasco and Adgas completed in 2013, is designed to transfer 1 billion cf/d of gas from the offshore Umm Shaif field to new onshore processing facilities at Habshan and Ruwais.

Gasco is responsible for the processing of onshore associated and non-associated gas in Abu Dhabi emirate. The company is a joint venture of state-owned Abu Dhabi National Oil Company (ADNOC), the UK/Dutch Shell Group, France’s Total and Portugal’s Partex.