Abstract
With the development of the offshore oil and gas fields, more and more offshore oil and gas fields are found to have high carbon dioxide. In addition, as peaking carbon dioxide emissions and carbon neutrality were written into the government work report for the first time, the correct separation and emission of CO2 have become a key issue that needs to be solved by offshore oil and gas fields. In this paper, we studied two CO2 separation methods suitable for offshore platforms and the current status of CO2 offshore storage and application. Moreover, the development of offshore carbon dioxide storage application was investigated in detail, and the technical characteristics and application prospects of CO2-EOR and CO2 replacing combustible ice were analysed and discussed. This paper analyses the challenges and countermeasures of offshore CO2 storage from many aspects. It provides a theoretical reference for future CO2 treatment in offshore oil and gas fields.
Highlights
With the development of the offshore oil and gas fields, more and more offshore oil and gas fields are found to have high carbon dioxide (CO2), and the carbon dioxide content of some offshore field is up to 40%[1]
The latest assessment report of Intergovernmental Panel on Climate Change (IPCC) shows that to achieve the global temperature limit of 1.5 °C, global CO2 emissions will need to be reduced by about 45% in 2030 compared to 2010, and “net zero” emissions will need to be achieved in 2050[3]
The CO2 offshore storage combined with combustible ice exploit can accelerate the development of combustible ice, which is of great significance to alleviate the current situation of energy shortage in the world
Summary
With the development of the offshore oil and gas fields, more and more offshore oil and gas fields are found to have high carbon dioxide (CO2), and the carbon dioxide content of some offshore field is up to 40%[1]. In offshore gas fields, the high content of CO2 have a potential corrosion risk to the upper structures and pipeline. The correct separation and emission of CO2 have become the key problem to be solved by offshore oil and gas fields. Carbon capture and storage (CCS) is a methodology to separate CO2, to store the CO2, commonly originating from power generation, industrial processes, and from CO2 gas fields. IPCC report[4] has indicated that in the absence of CCS implementation, the required total cost to mitigate global climate change may escalate up to 138%. The further development of CO2 separation and capture technology in offshore oil and gas fields conform to the basic requirements of the country in the field of energy. As the carbon-rich matrix, the successful recovery and reuse of CO2 can solve the fuel supply problem of the offshore drilling platform and make preparation for the step of offshore CO2 storage
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