Extending subsea tiebacks with OTEC provides a sustainable option for deepwater marginal fields: Capex savings on long subsea tiebacks can reach up to 48% with ocean thermal energy conversion (OTEC).

The article discusses the economic advantages of using Ocean Thermal Energy Conversion (OTEC) through OTEC Floating Installations (OFIs) to extend subsea tiebacks for deepwater marginal oil and gas fields. It highlights that implementing OFIs can lead to capital expenditure (capex) savings of up to 48% compared to conventional setups, particularly beyond distances of 20 km. The analysis indicates that while OFIs require a significant initial investment, they reduce long-distance cost sensitivity by eliminating the need for costly umbilicals and water injection lines, making them a more sustainable and economically viable option for offshore operations. The potential for OFIs is emphasized in tropical and subtropical regions, where they could reshape offshore reserve development by providing a cleaner alternative to traditional tieback strategies. [Extracted from the article]