Work is progressing on the engineering, procurement, construction and management (EPCm) contract for an in-field distribution network to disseminate treated seawater to water injection wells in onshore oil fields as part of Abu Dhabi National Oil Company's (Adnoc) Project Wave.

Adnoc Onshore awarded Greece's Archirodon the EPCm contract for the project earlier this year, according to a source close to the project.

The EPCm contract will cover the replacement of an existing water injection infrastructure with a new treated seawater injection network, as well as the installation of sub-adits, among others.

The contract awarded to Archirodon is for three years, with the client expected to tender the EPC work at some point during the duration of the contract.

Project Wave will replace the current aquifer water injection systems used to maintain reservoir pressure in all onshore oil fields in Abu Dhabi. It will utilise seawater as an additional source for enhanced oil recovery-based injection into Abu Dhabi's onshore fields.

The EPCm contract awarded to Archirodon covers the third component of Project Wave. The other two packages are being procured using a public-private partnership (PPP) model. 

PPP packages

Adnoc and Abu Dhabi National Energy Company (Taqa) awarded the 30-year build-own-operate-transfer (BOOT) contract for the first PPP package to a team of Egypt's Orascom Construction and Metito in May this year.

The package awarded to the Metito and Orascom team involves the development of a seawater nanofiltration plant with a capacity of more than 115 million imperial gallons a day (MIGD) in Mirfa.

The scheme includes the plant's seawater intake and outfall facilities, two pumping stations, a 75-kilometre (km) water transmission pipeline and an in-field distribution network of more than 230km to support reservoir pressure maintenance in the Bab and Bu Hasa oil fields in Abu Dhabi.

The facilities are expected to reach commercial operation by June 2026.

The clients and the project developer team reached financial close for the project on 25 September.  

Adnoc and Taqa will hold a joint majority stake of 51 per cent in the project company, while the developer consortium will hold the remaining 49 per cent.

The project is expected to reduce the water injection-related energy consumption of the oil fields by up to 30 per cent.

It is understood that Project Wave's second PPP package, in Al-Nouf, will be tendered separately.