Das Island Integrated Development Strategy

Objective

To assess and design an integrated development strategy for Das Island that optimises facilities, infrastructure, and operations to support ADNOC Offshore’s production targets beyond 2027, encompassing the Lower Zakum (LZ), Umm Shaif (US) and Nasr developments.

Project Scope

The Das Island Integrated Development study focused on:

1. Evaluating the feasibility of integrating future LZ and US production trains for efficiency and scalability.
2. Conducting oil stabilisation configuration assessments to improve recovery and eliminate operational challenges.
3. Developing a flare rationalisation strategy to optimise land use and improve safety.
4. Assessing the adequacy of common facilities, including Instrument Air (IA), Produced Water Treatment (PWT), steam systems, gas headers and power supply.
5. Recommending alternative heating systems to reduce greenhouse gas (GHG) emissions and operational costs.
6. Aligning the development roadmap with ADNOC’s Long Term Development Plans (LTDPs).

Findings & Recommendations

Findings

• Integrated Facilities Feasibility: Integration of LZ and US plants was evaluated for both segregated and co-located scenarios. While integration did not reduce train requirements, co-location in the Flare Area emerged as the most viable option, offering CAPEX savings and operational synergies.
• Oil Stabilization: Low Pressure (LP) reboiled stripping was identified as the optimal configuration for increased oil recovery and resolving dewatering and gas dissolution issues in crude storage.
• Flare System Rationalization: Existing flares can be rationalised by relocating Coanda flares offshore and decommissioning redundant flares, freeing up land for new facilities and reducing risks.
• Alternative Heating Systems: A hot oil system with electric heaters was recommended, enabling a lifecycle reduction of 4.34 MM tons of CO2 emissions and decommissioning older boilers.
• Common Facilities Adequacy: Expansion of the SWDP system and additional power infrastructure are required to support increased production and heating demands.

Recommendations

1. Adopt the LP reboiled configuration for LZ and US stabilisation systems to
   enhance recovery and energy efficiency.
2. Develop the Flare Area for co-locating LZ and US plants, ensuring alignment
   with demolition and construction sequencing to minimise HSE impacts.
3. Expand the SWDP system, including new disposal pumps, FEED tanks and
   pipelines, to address future demand.
4. Secure additional power capacity (200 MW) from Project Lightning to meet
   heating system requirements.
5. Progressively convert existing plants to electric heating or hot oil systems for
   further GHG reductions.