Malaysia’s national upstream company Petronas Carigaliisprogressing its Kasawari phase two project offshore Malaysia that will incorporate a large carbon capture and storage (CCS) element.

The latest element of the Kasawari 2 project, for which the operator is targeting the final investment decision in 2023, will involve a marine flora and fauna survey along the planned route of the carbon dioxide reservoir pipeline to the proposed Kasawari CO2 sequestration platform offshore Sarawak.

If Petronas’ workscope goes ahead as scheduled, the survey to be performed by the vessel MYY Aleeya is due to start on 8 July with completion scheduled for 14 August.

In addition to surveying the location around the proposed CO2 sequestration platform, there will be a study of the Hayes and Comus reefs along the route.

Petronas has chosen the M1 field as its target depleted reservoir to store the captured CO2 from Kasawari’s second development phase, which will exploit part of the giant gas field with a higher CO2 content.

The CCS project is expected to reduce CO2 volumes emitted via flaring by a total of 76 million tonnes over the expected field life, with an annual average saving of 3.7 million tonnes per annum.

The Kasawari 2 project calls for a fixed platform — with the jacket and topsides weighing between 10,000 and 14,000 tonnes each — that will be installed in a water depth of 108 metres.

This new platform will be bridge-linked to the Kasawari main central processing platform, with a new 138-kilometre 16-inch subsea pipeline delivering the compressed CO2 for injection at a depleted reservoir at the M1 field.

The main Kasawari project is expected to start up by 2023 while Kasawari 2 with the related CCS scheme is expected to be operational two years further down the line.

The giant Kasawari field on the SK 316 production sharing contract area offshore Sarawak, East Malaysia hosts around 3.2 trillion cubic feet of recoverable gas reserves.

Xodus, a subsidiary of Oslo-listed offshore contractor Subsea 7, performed the conceptual design and feasibility studies for Kasawari 2.

Malaysia Marine & Heavy Engineering (MMHE) and United Arab Emirates contractor National Petroleum Construction Company (NPCC) are currently conducting parallel paid front-end engineering and design studies for the Kasawari CCS project — MMHE has teamed up with Ranhill Worley while Technip Energies is the engineering partner for NPCC.

The final investment decision for Kasawari 2 is scheduled before the end of the year, which could coincide with the successful FEED pairing being awarded the follow-on engineering, procurement, construction and installation contract.

Petronas Carigali holds a 100% operated interest in the SK 316 PSC after changing its mind on bringing on board a partner despite drumming up interest — not least from Thai counterpart PTTEP — after it initiated a farm-out process.