Abstract
Carbon neutrality is a goal the world is striving to achieve in the context of global warming. Carbon capture and storage (CCS) has received extensive attention as an effective method to reduce carbon dioxide (CO2) in the atmosphere. What follows is the migration pathway and leakage monitoring after CO2 injection. Interferometric synthetic aperture radar (InSAR) technology, with its advantages of extensive coverage in surface deformation monitoring and all-weather traceability of the injection processes, has become one of the promising technologies frequently adopted in worldwide CCS projects. However, there is no mature evaluation system to determine whether InSAR technology is suitable for each CO2 sequestration area. In this study, a new evaluation model is proposed based on the eight factors that are selected from the principle of the InSAR technique and the unique characteristics of the CO2 sequestration area. According to the proposed model, the feasibility of InSAR monitoring is evaluated for the existing typical sequestration areas in the world. Finally, the challenges and prospects of InSAR in the CCS project are discussed.
Highlights
The constant excess of carbon dioxide (CO2 ) in the atmosphere is an important issue that human beings need to solve and in the future
According to the properties of Interferometric synthetic aperture radar (InSAR) technology and the characteristics of sequestration areas, a feasibility assessment method based on remote sensing was proposed for monitoring surface deformation in CO2 sequestration areas
We proposed a new feasibility evaluation model based on the properties of InSAR
Summary
The constant excess of carbon dioxide (CO2 ) in the atmosphere is an important issue that human beings need to solve and in the future. Has published its latest assessment of the global CO2 budget, and despite the impact of COVID-19, human-made CO2 emissions (CO2 emissions from fossil fuel consumption and land use change) are still far greater than the net CO2 absorption by oceans and lands [1]. Due to gravity or the buoyancy effect, it may flow upward and leak to the ground; the density of CO2 is greater than that of air. After leakage, it will accumulate on the surface, which may lead to the loss of humans, animals, plants, and environment [3]. Real-time ground monitoring during injection is necessary. Due to the change of formation pressure caused by injection, new fractures may be generated, which will cause
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