Progress and prospect of the whole process technology of offshore CCS engineering project
The technical progress of the whole process of CCS in typical offshore scenarios is analyzed and the challenges and prospects for the future development trend are put forward.The offshore CCS project mainly has two typical scenes,including the CO2 capture on the offshore platform and the transportation of CO2 capture from the onshore to the offshore for storage.The CO2 capture process of offshore platform is mainly based on membrane separation,combined with various process combinations.The main sources of terrestrial emissions include natural gas processing terminals and refining enterprises.The capture process is selected based on the concentration of the gas source,with a focus on chemical absorption,and low-cost processes are studied.Offshore CO2 transport mainly includes ship and pipeline.At present,pipeline transport is in the pilot stage,and large CO2 transport ships are under design and construction.The offshore storage site mainly includes brine layer and depleted oil and gas reservoir.The focus of brine layer storage is to study the cap rock sealing,long-term stability and offshore monitoring technology.Considering the technology and cost,the offshore CCS project will develop into a cluster project in the future,and joint emission enterprises and storage enterprises carrying out CO2 utilization and storage.It is necessary to focus on solving the problems in the process of efficient and low-cost CO2 capture technology for offshore platforms,large offshore CO2 ships and offshore storage monitoring.
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