The main objective of Bu Hasa-Shuaiba EOR Unit 1 (Phase 1) is to achieve a targeted 70% increase in oil production and extend the production plateau of Abu Dhabi’s Bu Hasa field
The onshore oil and gas business of Abu Dhabi National Oil Company (Adnoc Onshore) has sought bids from contractors for a key project to increase the oil production capacity of the Bu Hasa oil field, primarily through enhanced oil recovery (EOR) techniques.
The main objective of the Bu Hasa-Shuaiba EOR Unit 1 (Phase 1) project is to achieve a targeted 70% increase in oil production, extend the Bu Hasa field development’s production plateau and maximise the field’s potential in an economical manner.
The project aims to confirm and validate the optimum EOR technology for the top-ranked reservoirs/units; assess incremental recovery on top of the improved oil recovery (IOR) wedge; extend the field plateau for as long as is economically feasible; and achieve an ultimate recovery factor of 70% from the Shuaiba reservoir. It will evaluate and execute the recommended EOR option through pattern phasing for any technology proven by Adnoc.
Adnoc Onshore is understood to have issued the tender for the project on 20 September, with an initial technical bid submission deadline of 8 October, according to sources. The client later extended the technical bid submission deadline to 17 October, sources told MEED.
The chosen contractor will execute the project under a hybrid contracting strategy comprising:
- A lump sum (turnkey) EPC scope covering the complete pipeline system from East Hub to the separation plant
- A call-out-based scope for execution of all WAG injector and WSW tie-in works
Unless otherwise specified, all activities defined under the contractor’s scope will be deemed included within the lump-sum contract price. This will cover engineering, procurement, construction, testing, pre-commissioning and support to commissioning for a complete and operable system.
At the Bu Hasa field development, three remote degassing stations (RDS-1/2/3) and two satellite stations, Bida Al-Qemzan and Huwaila, are currently in operation. Production from oil wells completed in Shuaiba, Thamama B, Thamama F, Bida Al-Qemzan and Huwaila is routed via individual flowlines to the three remote degassing stations and the Bida Al-Qemzan and Huwaila stations across different parts of the field.
Combined production from the wells at each of these stations is routed to the central degassing stations (CDS) via transfer lines ranging from 16 inches to 24 inches in diameter. In addition, some wells in the central part of the field are connected directly to the CDS.
Previous studies have identified carbon dioxide (CO2) flooding as a promising tertiary recovery mechanism in the Shuaiba reservoir, delivering incremental recovery on top of the IOR wedge (P5 project), extending the field plateau as long as economically feasible, and achieving an ultimate recovery factor of 70% from the Bu Hasa Shuaiba units.
Located 200 kilometres south of Abu Dhabi city, Bu Hasa is Adnoc Onshore’s westernmost producing field. It is one of Abu Dhabi’s biggest onshore assets, with crude oil production capacity of 650,000 b/d. It is also one of the Adnoc Group’s oldest oil fields, having been discovered in 1962 and in production since May 1965.
As part of the ongoing Bu Hasa Integrated Field Development Project (BUIFDP), 13 new well pads and two pad hubs have been added to the field. Oil, gas and water produced at these sites will be collected at a central gathering facility, then sent through production headers and transfer lines to the CDS for processing.
Adnoc Onshore is the Adnoc Group’s largest oil-producing subsidiary, accounting for 2 million b/d of oil and about 7 billion cubic feet a day of associated gas production from four main onshore field developments in Abu Dhabi: Bab, Bu Hasa, North East Bab and South East.