The offshore platform in Field X operates 2 (two) Gas Turbine Compressor units which function to compress gas pressure as fuel supply for the Gas Turbine Generator. The running hours of these Gas Turbine Compressor units have nearly reached 30,000 hours, prompting the manufacturer to recommend an Engine Exchange to maintain its operational reliability. Prior to the approval of the Gas Turbine Compressor engine exchange work plan, an economic evaluation and risk identification are required to assess the financial feasibility and identify potential risks that could affect the smooth implementation of the work. This study aims to provide comprehensive recommendations on economic aspects and risks to the management as a basis for investment decision-making. The research employs the Benefit/Cost Analysis method and Risk Register to evaluate the economic and risk levels of the work plan. The research findings that the work plan for the engine exchange of the gas turbine compressor on the offshore platform in Field X is feasible from an economic and risk perspective, as it has a BCR value > 1 with low to moderate risk and low risk level.