Malaysia offshore CO2 storage JV targets 5 Mtpa from 2031

According to the companies’ joint venture announcement, the Petronas, TotalEnergies and Mitsui offshore CO2 venture in Malaysia is targeting up to 5 million tonnes of CO2 injection capacity per year, with commercial operations scheduled “as early as 2031.”

That figure is design capacity for an initial phase at a depleted offshore gas field, not a facility already built or operating. The partners are still advancing final technical and commercial workstreams before taking a Final Investment Decision (FID). The announcement does not establish that construction has started or that customers have contracted the full volume.

What storage capacity is actually on the table?

The signed agreement establishes a dedicated corporate entity to manage “engineering development, commercial marketing and long-term site operations,” according to the partners. For emitters and maritime CO2 suppliers, that structure creates one organizational interface for a future storage service, rather than leaving each counterparty to manage the reservoir independently.

The depleted reservoir is intended to receive and permanently store CO2 from domestic heavy-industrial point sources and cross-border maritime shipments. Those routes concern the same material stream: captured CO2 from Malaysian facilities enters the field for injection, while imported CO2 arrives by vessel before entering the same storage chain.

At the stated ceiling, 5 million tonnes a year equals about 13,700 tonnes a day on a simple 365-day average. That conversion illustrates the scale of the planned injection system; it does not indicate expected utilization. The partners have disclosed no customer allocations, tariff structure, offtake volumes or schedule beyond the earliest 2031 commercial date.

Who is responsible for what?

• Petronas: The Malaysian state energy company supplies subsurface technical data and access to regional infrastructure through its dedicated CCS division.
• TotalEnergies: The French energy major contributes technical design and project-development experience.
• Mitsui & Co.: The Japanese trading group contributes maritime logistics and structured-finance expertise.

Together, these roles cover reservoir knowledge, engineering, shipping and finance. The arrangement is designed to support a commercial storage service, not just a carbon-storage study, and gives the depleted field a central role in Malaysia’s policy push to become an Asia-Pacific carbon capture and storage hub.

How far advanced is the project?

The agreement builds on preliminary technical-cooperation agreements and Front-End Engineering Design studies that the three companies completed between 2023 and 2025. The partners are now advancing the final technical and commercial workstreams required for FID, the capital gate that would allow them to commit to the next stage of field development.

Petronas has secured Malaysia’s first offshore carbon-storage assessment permit, a separate step referenced alongside the venture. The joint venture announcement does not identify the issuing agency or permit date. The assessment marks an earlier site-evaluation milestone; it does not amount to the FID that would commit the joint venture to development.

What does the hub model change for industry?

For Malaysian heavy-industry operators, a shared offshore sink could offer an alternative to developing a dedicated storage project for each industrial cluster. The concept does not identify participating plants or committed CO2 streams, so it does not yet establish a bankable source for any specific emitter.

Cross-border shippers would follow a different route. They would move captured CO2 to Malaysia for offshore injection, placing the venture’s maritime logistics role alongside its reservoir and engineering functions. The announcement provides no vessel routes, shipment volumes or cross-border commercial terms.

The hub framing gives the project a strategic role beyond domestic disposal. It positions Malaysia as a potential centralized storage jurisdiction for the Asia-Pacific, combining heavy-industry capture with offshore storage and maritime imports. That proposition depends on more than reservoir capacity: customers, shipping schedules and approvals must converge around one operating service.

For emitters and shippers, the nearer commercial test is whether the operating company can sign supply agreements and offer workable transport, storage and marketing terms. Until those commitments emerge, the two intended supply channels remain components of the development concept rather than contracted streams.

What has to happen before 2031?

Before commercial injection can begin, the partners need to close their final technical and commercial workstreams, take FID and complete the required site-development and cross-border approvals for their chosen operating model. The announcement gives no FID date, capital cost or construction schedule, so its earliest 2031 target remains contingent.

FID is the market milestone that converts a depleted field and a 5-million-tonne design target into a funded development program. Customer agreements then determine whether the planned injection system attracts enough CO2 to become a working regional storage service.

Until FID and customer commitments, 5 Mtpa is planned capacity, not banked storage supply.