This paper describes the experience of PETRONAS in sustainable development of a high CO2 gas field. The development project which have a potential of storing 23MTPA of CO2 in a nearby offshore saline aquifer is energy intensive. The operational cost of operating the high duty CO2 capture, transport and reinjection (or CCS) facilities has a negative impact on the overall project economics. As such, optimizing the energy footprint of the CCS facilities is imminent. As a means to achieve the desired duty reduction, the project have identified potential energy recovery from the high pressure well stream via the adiabatic turboexpander gas expansion, deployment and integration of the liquid CO2 pumps as opposed to the conventional higher duty compressor systems and utilizing low BTU gas turbine drivers to avoid the high duty fuel gas separation penalty. The aggregate duty reductions achieved has met the initial project expectation. However, the deployment of these technology is rather new for offshore service and a proper technology qualification exercise is a necessity.