THE NEWS

According to Petronotícias, French engineering, consulting and project management firm DORIS is conducting pre-FEED and advanced FEED work for the revitalization and electrification of platforms PCH-1 and PCH-2 at the Cherne field in the Campos Basin, in collaboration with Perenco Brasil. The two platforms, which have topsides weighing between 15,000 and 18,000 tonnes, were commissioned in 1984 and have been out of operation since 2020.

DORIS described the scope as a complex brownfield project and framed the electrification component as directly addressing "a central challenge: optimizing the energy footprint of mature fields." The program targets a production rate of 15,000 barrels of oil per day and the recovery of more than 50 million barrels of reserves.

Perenco announced the $250 million revitalization program in September 2025, shortly after completing the acquisition of the Cherne and Bagre concessions from Petrobras in August 2025. The reactivation program is structured in three interconnected phases, with operational safety as the primary directive, and has an anticipated duration of two years.

WHY IT MATTERS

The progression from conceptual pre-FEED into advanced FEED is a meaningful milestone in any capital project. It signals that the technical basis for the investment is being locked down — cost estimates tighten, scope is defined, and the path to a final investment decision becomes clearer. For a program of this scale and complexity, reaching advanced FEED with a dedicated engineering contractor engaged is a strong indicator that the project is tracking toward execution rather than remaining a stated intention.

The three-phase structure that Perenco has laid out is worth examining in detail, because it reflects the engineering logic of reactivating infrastructure that has been dormant for several years. Phase one addresses platform integrity across PCH-1 and PCH-2 — turbine replacement or refurbishment, water treatment systems, measurement system modernization, and topside flowline maintenance or replacement. This is the enabling work: none of the subsequent phases are executable without a mechanically sound and certifiable platform. The fact that this phase is already underway suggests the project schedule is live.

Phase two introduces new infrastructure: a 10-inch pipeline of 27 kilometres connecting PCH-1 to the Pargo platform, from which production will flow to the FSO Pargo via an existing export line. A water injection line between PCH-1 and PCH-2 is also planned as part of the modernized injection system. The use of existing export infrastructure at Pargo is a capital-efficient routing choice — it avoids the cost and lead time of a new export pathway while leveraging assets already in place in the basin.

Phase three, focused on well interventions and re-entry, is where the production volumes will actually be unlocked. The plan covers 36 wells, including 21 workover campaigns, with evaluations to determine whether gas lift or electric submersible pumps (ESP) are the appropriate artificial lift method for each well. For a field of this vintage, the lift method selection will have a direct bearing on both production profiles and operating costs — ESP installations typically deliver higher production rates but carry greater intervention frequency, while gas lift offers operational simplicity at the cost of compression infrastructure.

The electrification component deserves separate attention. DORIS frames it explicitly as a means of reducing the energy footprint of mature field operations — a positioning that reflects a broader shift in how brownfield projects are being scoped and communicated, particularly in the context of emissions reduction commitments by operators and the evolving expectations of financiers. For the Brazilian offshore sector, this is a relevant data point: the Campos Basin holds a large stock of mature assets, and the Cherne project may serve as a reference case for how electrification is integrated into future revitalization scopes rather than treated as a separate decarbonization initiative.

From a supply chain and services perspective, the DORIS engagement also illustrates the continued role of specialized engineering firms in Brazil's mature asset segment. As operators like Perenco take on concessions that larger producers have chosen to divest, they typically require engineering partners with deep brownfield expertise rather than the large-scale EPCI capabilities associated with greenfield deepwater developments. This dynamic creates a distinct market segment within the Brazilian offshore services ecosystem — one oriented around integrity management, systems refurbishment, and phased reactivation rather than new construction.

CONTEXT

The Cherne and Bagre acquisitions from Petrobras, completed in August 2025, are consistent with a broader pattern in the Campos Basin: mature concessions transitioning from Petrobras to independent and mid-tier operators who see value in assets that no longer fit within a major's capital allocation priorities. Perenco, with operational experience across mature fields in multiple geographies, is positioned to apply that model in Brazil.

The $250 million program scale and the 50-million-barrel reserve recovery target place this project among the more substantial mature field reactivations currently active in Brazilian offshore. As the FEED phase concludes and contracting for execution phases begins, the project will generate procurement and services activity relevant to a range of Campos Basin suppliers and contractors.

Source: PETRONOTÍCIAS