Afentra (AIM:AET) said on Tuesday that its Pacassa SW well had struck oil, reaching a total depth of 5,381 metres and encountering 136 metres of net oil pay in the fractured Albian Pinda carbonate formation, in line with the company's pre-drill model.
Management estimated the wider Pacassa SW structure could hold up to 70 million barrels of gross recoverable resources, equivalent to roughly 23 million barrels net to Afentra once its pending Etu acquisition completes.
The well is to be completed as a producer and tied into existing Pacassa infrastructure, with first oil targeted for the third quarter of 2026.
Alongside the discovery, Afentra disclosed that Impala-1, shut in since 2017, has been brought back onto production through a light well intervention.
The well is flowing at up to roughly 4,700 barrels of oil per day gross, currently constrained to around 3,000 bopd to manage water cut.
Data gathered from the intervention will feed into planning for the Impala-2 development well, targeted at an initial rate of around 4,000 bopd, with drilling expected to start once Pacassa SW operations conclude and results due by the end of the fourth quarter of 2026.
The shares advanced around 10% on Tuesday to 70.4p, compared to its 52-week range of 35.33p to 89.4p, which puts the company's market capitalisation at roughly £174.4 million.
Why it matters
Afentra described the Pacassa SW discovery as the first well delivered on Block 3/05 in more than a decade, a gap that had left the asset's subsurface upside largely untested under the company's ownership.
A positive result there speaks directly to whether the block can support the production growth that has underpinned Afentra's investment case since it began assembling its Angolan portfolio.
The Impala-1 reactivation adds a second, more immediate strand: incremental barrels from existing infrastructure at low incremental cost, running in parallel with the exploration upside from Pacassa SW.
Together the two results give Afentra near-term production additions and a resource upgrade in the same update, at a company whose net average production had run at 5,777 bopd in the six months to 30 June 2026 and whose two liftings in that period generated $91.0m in revenue.
Chief executive Paul McDade called the discovery "a major milestone for the Block 3/05 partnership, representing the first well delivered on Block 3/05 in more than a decade."
About the company
Afentra is a London-listed upstream oil and gas company that acquires and develops production and near-field assets, with its portfolio concentrated offshore and onshore in Angola.
It targets midlife production assets, near-field development opportunities and short-cycle exploration, generating revenue from operating and developing upstream assets in the country, run by a reported headcount of 18.
The core positions span Block 3/05 and Block 3/05A offshore, where the Pacassa platform sits, and the onshore Kwanza basin, where Afentra operates Block KON4 with a 35% interest alongside Grupo Simples Oil, Sonangol E&P, Brite's Oil and Gas and Sodedurs.
KON4 contains the Quenguela Norte field, estimated to hold more than 200 million barrels of discovered oil in place and which previously produced around 12,000 bopd before being shut in.
Cash stood at $97.4 million at 30 June 2026, with net cash of $28.4 million after drawing $70 million of a new $125m Gunvor prepayment facility that replaced Afentra's prior reserve-based lending and working-capital facilities at a lower cost of capital.
How it got here
Afentra's expansion this year has run on two tracks at once.
In May, it secured formal award of Block KON4 onshore, described by McDade as adding "an operated position to our growing onshore Kwanza basin portfolio" and reinforcing a commitment to building a material presence in this under-explored but highly prospective basin.
Days later, it moved to fund that ambition, raising US$40m in an oversubscribed institutional placing to accelerate the pursuit of new opportunities, followed by confirmation that the full US$42.7m raise, including an oversubscribed retail offer, had completed with strong retail demand reflecting continued investor appetite for its African upstream strategy.
By July, the balance sheet work had been paired with a refinancing: Afentra reported $91m in first-half revenue alongside a Gunvor prepayment facility that cut its cost of capital, giving it $97.4m in cash and headroom to fund the drilling campaign that followed.
That campaign was itself flagged in advance by McDade, who said Afentra had "commenced the first drilling campaign for over a decade on Block 3/05, with the prospect of a transformational increase in our production and resource base."
Broker attention built ahead of the result. Shore Capital had already lifted its target to 147p from 126p in early August, arguing the shares offered compelling value ahead of drilling results for Pacassa SW-1 and Impala-2.
Tuesday's discovery, and the resulting share move following the Pacassa SW find, arrived as the direct test of that thesis.
Market view
Shore Capital Markets reiterated its Buy rating and 147p target on the day of the discovery, highlighting the good reservoir quality and communication with the main Pacassa field as key details in the company's analysis, and noted the well is expected to deliver around 5,000 barrels a day gross flow with up to 70 million barrels of gross recoverable resources from Q3 production.
The broker said the success de-risks the Block 3/05 growth outlook.
Zeus Capital also repeated a Buy rating, and upgraded its target price to 125p from 115p, arguing that the exploration success adds material reserves and supports near-term production growth in the third quarter of 2026, while noting that operator funding arrangements reduce Afentra's exploration risk while retaining upside.
Both brokers had flagged the drill campaign as pivotal beforehand.
Shore Capital's earlier note, which lifted its target to 147p from 126p, had called the drilling programme the biggest test yet of management's multi-year growth plan for the core Angolan asset.
What's ahead
Afentra's half-year results are due in mid-September, alongside an expected update on the Etu transaction, which is set to add incremental interests of roughly 3.33% in Block 3/05 and 3.66% in Block 3/05A pending Angolan government approval in the third quarter of 2026.
First oil from Pacassa SW is targeted for the third quarter of 2026 following well completion and tie-in to existing infrastructure.
Drilling of the Impala-2 development well is expected to start once Pacassa SW operations conclude, with results due by the end of the fourth quarter of 2026.
On Block 3/24, Afentra has already completed its first operated offshore campaign, inspecting four subsea wellheads using a compact remotely operated vehicle for around $60,000, against typical industry costs the company put at $500,000 to $1 million.
The wrap
A discovery on a block that had gone without a new well for over a decade, paired with a shut-in well brought back to several thousand barrels a day, gives Afentra two separate production levers heading into a September update that will also address the Etu transaction and half-year results.
Afentra is likely to garner investor attention over the coming months as the assets continue to progress.
Stock Intelligence is an editorial feature compiled from tickstock's own reporting, company disclosures and cited third-party research. It is not investment advice, a recommendation or an invitation to deal in any security. Third-party views are attributed to their source. Always do your own research.
