  This paper considers the operation of offshore oil and gas platform energy
systems with energy supply from wind turbines to reduce local CO2 emissions. A
new integrated energy system model for operational planning and simulation has
been developed and implemented in an open-source software tool (Oogeso). This
model and tool is first presented, and then applied on a relevant North Sea
case with different energy supply alternatives to quantify and compare CO2
emission reductions and other key indicators.
