Serica Energy Completes Spirit Deal, Adding Around 10,000 boepd

Serica Energy PLC has completed its acquisition of a portfolio of Southern North Sea assets from Spirit Energy, adding around 10,000 barrels of oil equivalent per day to production.

The AIM-listed oil and gas producer has paid Spirit Energy a net £33 million, equivalent to $43 million. That is considerably below the headline upfront consideration of £57 million because Serica benefits from interim post-tax cash flows generated between the transaction's effective economic date and completion.

More importantly for investors, Serica now expects the acquired assets to generate more than $200 million of free cash flow by the end of 2028. That forecast is more than double the company's expectation when the acquisition was announced in December 2025.

The key acquisition figures

Metric	Detail
Net payment at completion	£33 million ($43 million)
Upfront consideration before adjustments	£57 million ($75 million)
Production added	Around 10,000 boepd
2P reserves	18.7 mmboe
2C resources	3.4 mmboe
Forecast free cash flow by end of 2028	More than $200 million
Cygnus working interest	15%
Clipper South working interest	25%

Boepd means barrels of oil equivalent per day, a standard measure used to combine oil and gas production into one figure. The reserves and resources figures are stated as at the transaction's effective economic date of 1 January 2025.

The full transaction details can be found in the original company announcement.

Why Serica paid £33 million rather than £57 million

The £57 million upfront consideration was reduced by interim post-tax cash flows generated from 1 January 2025 to the completion date of 1 October 2026.

That left Serica with a net completion payment of £33 million.

This is an important part of the economics. Although legal completion has only just occurred, the transaction was structured with an earlier effective economic date. Cash generated during the intervening period therefore reduced the amount Serica needed to hand over at completion.

The announcement does not disclose the precise amount of production or cash flow generated during each part of that period.

Free cash flow expectations have more than doubled

The standout update is the forecast for the acquired assets to generate more than $200 million of free cash flow by the end of 2028.

Free cash flow is the cash left after operating costs and capital expenditure. It can support investment, debt reduction, acquisitions or shareholder returns, although Serica has not said in this announcement how the expected cash will be allocated.

Management says the forecast has more than doubled since the acquisition was announced in December 2025. It attributes the improvement primarily to:

• A stronger gas price outlook
• A robust production outlook
• Some production and cash flows moving from the interim period into the period after completion

That third point matters because post-completion cash flows will now be received directly by Serica rather than used to reduce the completion payment.

The higher forecast is encouraging, but investors should remember that it remains a forecast. Actual cash generation will depend on production reliability, operating expenditure, investment requirements and gas prices.

Serica had already reported stronger cash generation in its H1 2026 results. The new Southern North Sea portfolio gives the company another source of near-term production and cash flow.

What assets has Serica acquired?

The portfolio includes a 15% non-operated working interest in Cygnus, described by Serica as one of the largest producing gas fields on the UK Continental Shelf.

It also includes:

• A 25% non-operated interest in the Clipper South gas field
• Operated interests across assets in the Greater Markham Area
• Additional operated and non-operated interests across Southern North Sea gas fields

Serica will report production from the acquired portfolio as its Southern North Sea Hub.

The distinction between operated and non-operated interests is worth noting. An operator manages day-to-day activity, while a non-operating partner owns an economic interest but has less direct control over operational decisions.

The portfolio brings 18.7 million barrels of oil equivalent of 2P reserves and 3.4 million barrels of oil equivalent of 2C resources. In industry language, 2P represents proved plus probable reserves, while 2C refers to the best estimate of contingent resources that are not yet classified as commercial reserves.

Decommissioning protection improves the deal economics

Decommissioning is one of the largest long-term risks attached to mature North Sea assets. It covers the cost of safely shutting infrastructure, plugging wells and removing or securing offshore equipment.

Spirit Energy is retaining decommissioning liabilities relating to the operated assets. Serica expects these to represent more than 75% of the portfolio's total estimated decommissioning liability.

That is a meaningful protection for Serica because it limits exposure to a potentially substantial future cost. However, the announcement does not disclose the total estimated liability in cash terms, and it does not remove every decommissioning obligation associated with the acquired portfolio.

What investors should watch next

Completion removes transaction uncertainty and means the assets can begin contributing directly to Serica's reported production and cash generation.

The immediate production addition, relatively modest net payment and improved free cash flow forecast are the main positives. The retained decommissioning liabilities also make the deal's risk profile more attractive than it would have been if Serica had assumed the full burden.

There are still several points to monitor:

• Integration: Serica must combine the new assets and teams with its existing business without operational disruption.
• Gas prices: The improved cash flow forecast partly reflects a stronger gas price outlook, leaving the economics sensitive to commodity markets.
• Production performance: Mature offshore fields can experience unplanned downtime and declining output.
• Remaining liabilities: Spirit Energy is retaining most estimated decommissioning exposure, but Serica may still face costs elsewhere in the portfolio.
• Capital requirements: Future investment needs for maintaining production were not quantified in this announcement.

A material new hub for Serica

This is a strategically meaningful completion rather than a routine administrative update. Serica has added around 10,000 boepd, increased its weighting towards gas and established a new Southern North Sea production hub.

The forecast of more than $200 million of free cash flow by the end of 2028 is particularly eye-catching compared with the £33 million net payment made at completion. It should not be treated as guaranteed, but it highlights why management describes the acquisition as immediately cash-generative.

Attention now shifts from completing the purchase to delivering the forecast. Production reliability, gas prices and integration execution will determine whether the strengthened value case ultimately reaches Serica's shareholders.