Decarbonization of energy supply to offshore oil & gas production with post-combustion capture: A simulation-based techno-economic analysis

Matheus de Andrade Cruz, George Victor Brigagão, José Luiz de Medeiros, Ana Paula Santana Musse, Eduardo Kami, Ronaldo Lucas Alkmin Freire and Ofélia de Queiroz Fernandes Araújo

Energy, 2023, vol. 274, issue C

Abstract: Low-carbon-emissions FPSO (Floating, Production, Storage, and Offloading) designs are developed and compared, using process simulation in HYSYS, and an original economic analysis approach. FPSO units with power-intensive operations (e.g., fields with high gas-to-oil ratio) are the focus of the study. Three designs are evaluated: Case A considers a floating natural-gas-combined-cycle power unit with post-combustion CCS (Carbon Capture and Storage) connected to an existing FPSO. Case B.1 retrofits a CCS unit downstream of a conventional FPSO with simple-cycle power generation. B.2 adds a more efficient combined cycle to B.1. The removed CO2 is injected for enhanced oil recovery. Marginal abatement cost is investigated for oil prices of 60/80/100 USD/bbloil and recovery of 0.0/1.5/3.0 bbloil/tCO2 injected. The added weights to topsides are 4,326t (A), 2,762t (B.1) and 3,445t (B.2). CO2 intensity (kgCO2/boe) is reduced from 6.92 in the conventional design to 0.74 (A-B.2) and 0.92 (B.1). The marginal abatement cost of B.1 and B.2 are alike, approaching zero at 1.5 bbloil/tCO2 oil recovery. Taking technical retrofitting challenges aside, Case B.1 is the most cost-effective alternative. Cases A and B.2 have a slightly better environmental performance than B.1, but B.2 presents a superior economic performance and lower operational risks compared to A.

Keywords: FPSO; CO2-Rich natural gas; CO2-EOR; NGCC; CCS; Carbon intensity (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:274:y:2023:i:c:s0360544223007430

DOI: 10.1016/j.energy.2023.127349

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