Captain EOR Phase II
Case study
In H1 2024, the Group achieved a major milestone of successfully completing its EOR Phase II project within budget and on schedule. The project seeks to build on the success of the platform-based EOR Phase I project with an expansion to the subsea area of the Captain field.
The pioneering polymer technology, used in EOR, enhances reservoir sweep efficiency by injecting a water soluble polymer into the reservoir to sweep previously bypassed and stranded oil, directing it towards adjacent production wells. By accelerating and maximising field life recovery, polymer technology provides significant decarbonisation benefits.
With six new polymer injection wells brought online safely, first polymer injection in the subsea wells was achieved in May 2024, with the field experiencing its first EOR Phase II response from the E2 pattern production Wells B25 & B32. Initial observations suggest that the response is exceeding expectations with water cuts reducing by over 10% in four producers and increasing oil production by over 2.5 kboe/d relative to the business plan. The remaining five patterns are expected to respond over the next 18 months.
Supporting production
Captain EOR Phase II project will be a significant contributor to the Captain field supporting the Group’s medium-term production outlook, adding over 30 MMSTB incremental oil and, at its peak, delivering around half of all Captain production.
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