Deepwater drilling platform consumes much chemical and petroleum sources to provide sufficient energy for drilling services, which produces a large amount of carbon dioxide emissions into the atmosphere directly. To reduce the carbon dioxide (CO2) emissions and achieve the carbon neutrality target, carbon neutrality deepwater drilling platform concept is proposed. The carbon dioxide emissions need be captured and stored on the seabed. Some innovation conceptual designs for Carbon Capture, Utilization and Storage (CCUS) on deepwater drilling platform are conducted and present. An integrated design concept for combination of deepwater supercritical CO2 (SC-CO2) drilling, CO2 capture and storage is developed as an important measure to achieve carbon neutrality target for deepwtaer drilling platform. Other physical adsorption separation and storage concepts for CO2 emissions based on drilling riser is projected. The prospective and fundamental study on carbon neutrality deepwater drilling platform is of great reference and value for deepwater drilling engineering development in the background of global effort for carbon neutrality.
As an emerging and important technology for sustainable development, carbon capture, utilization and storage (CCUS) has attracted the attention of the international community (Franklin, 2018). United States, Canada and the European Union consider CCUS as an important part of their future energy strategy. Many well-known oil and gas companies such as Shell, Total, Chevron, ExxonMobil and Equinor have invested a lot of capital on the operation and planning of CCUS projects. The research on CCUS in China started late and put forward relevant concepts at the early 21st century. In recent years, China has made some progress in the research and development of CCUS technology in the onshore oil industry. PetroChina Jilin Oilfield has put forward the integrated model of CCS-EOR emission reduction and efficiency increase, but it is still in the experimental stage. The first megaton CCUS project led by SINOPEC is also under construction. China is a large marine country with great potential to use the ocean to store CO2. The carbon dioxide offshore reinjection project implemented by CNOOC in Enping 15-1 oilfield on August 2021 will permanently store more than 1.46 million tons of carbon dioxide However, the CCUS technology of offshore oil field is in the preliminary exploration stage and some relevant technologies are not mature.
