We will be showcasing the practical approaches / considerations in designing a CO2 injection well covering the engineering aspects, cost optimization and sustainable design for the injection period. This will also include the software aided simulations for the practical load analysis for selection design parameters and materials for the CO2 injector in an optimized manner. We will also address the importance and relevance of the MMV (monitoring, measurement, and verification) method to the CCS project and its influence on the well engineering scope. To deliver a sustainable well design, we referenced the existing CCS project against those undertaken in other parts of the world and identified the challenges, best practices, and operational approaches undertaken in those other wells. The well design and engineering has taken into consideration the existing internal and industry standards as well as lessons learnt from other CCS campaigns. The evaluation for the well design and construction was conducted to identify potential gaps lacking in the CO2 injection design in offshore carbonate environment. From the identified injection location, evaluation criteria were finalized to assist in decision making for the overall well design requirement covering injectors and observations wells. The injector well design and construction will be able to successfully counter the subsurface challenges faced in the overpressure clastic formation and depleted carbonate reservoir. The design of the well will also be capable of surviving the external and internal loads due to the injection operation for the duration of the campaign life. Furthermore, the design has taken into consideration the temperature reversal impact on surface and downhole due the supercritical CO2 fluids which has low temperature in nature. We also developed testing procedures and evaluation matrix for the fluid wetted (CO2 injection fluid) sections to optimize material selection for the wetted zone as a major well cost contributor resulting from the CO2 resistance materials. We are converting some of the identified end of field life producer wells into observations wells via sidetracking and workover methods. The current overall well placement between the injectors and observation wells has achieved a comprehensive coverage area for monitoring of the CO2 plume migration across the carbonate field. This is the first big scale campaign covering the offshore depleted carbonate field as a CCS candidate in the world as previous practices were only undertaken in the clastic environment. Success of this campaign opens more opportunities for achieving net zero carbon emission in the oil and gas industry.