The main types of offshore platform power stations are gas turbine generator sets and single fuel,dual fuel,and crude oil reciprocating generator sets.The equipment investment in the early stage and maintenance in the later stage are large,and the shutdown and maintenance are frequent.Based on the characteristics of marginal oil field development,an analysis is conducted on the configuration scale,fuel,electrical load,and other aspects of the main power station.Taking into account factors such as the individual power and initial investment of different types of generator units,size and weight,and technological maturity,a plan is selected to rely on the main power station of small marginal oil fields with relatively long distances.Research has shown that micro turbines can be used to generate electricity from oil fields that rely on distant and associated gas,saving long-distance reliance on submarine cables.Design solutions for the micro turbine black start system,fuel gas processing system,and intelligence of unmanned platforms in marginal oil fields to ensure the power supply safety of marginal oil fields.