Heerema Marine Contractors’ Thialf has installed the Cassia Compression (Cassia C) platform for bp Trinidad and Tobago LLC. The platform is located off Trinidad’s east coast. Thialf installed a 7800-metric-tonne topside, a bridge, and flare structures.

The Cassia C platform will enable Trinidad and Tobago LLC (bpTT) to access and produce low-pressure gas reserves from currently-producing fields in the Greater Cassia area, thereby maximising recovery from these existing resources.

Heerema installed the Cassia C jacket in 2020 with Sleipnir, and on July 27, finalised completion activities for the installation of the topside, bridge, and flare structures. The transportation of the structures was also Heerema scope, and they arrived in Trinidad and Tobago on July 15 from the Altamira fabrication yard.

The topside of approximately 7800 metric tonnes was installed first, with the other structures following. The next step in the project will be the hook-up and commissioning of the Cassia C platform. Thialf will now return to the North Sea to continue a busy summer season.

Cassia C platform

Gas production from the Greater Cassia Area will be routed to the Cassia C platform for compression before being transported via the adjacent existing Cassia B platform. Cassia C is located 57 kilometres off the southeast coast of Trinidad. The platform will have a throughput capacity of 1.2 billion standard cubic feet of gas a day (bcfd). First gas from the platform is expected in 2022.

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