Co2 Subsurface Storage Site(S) Assessment through an Integrated Geoscience Workflow

Abstract

Summary After CO2 capture and transport, storage is the third step of the CO2 journey. Accessing and utilizing regional seismic information is a significant part of any workflow attempting to identify and characterize proposed subsurface CO2 storage sites. In this paper, we have developed and implemented a workflow over a proof-of-concept (PoC) area to assess CCS storage capacity and containment at a saline aquifer site. Injectivity and monitoring/monitorability, will be assessed at a later stage. The integrated PoC CCS site assessment workflow allows validation of the various workflow elements and technologies, with a view to create an efficient and scalable tool for regional site identification and characterization. The current project has been established in the North Sea which comprises an extensive cross-border regional dataset in the UK and Norway. The broadband seismic data allows efficient, regional site assessment, by providing detailed 3D characterization of the subsurface, away from areas with well control, and the parameterization of more accurate/reliable attributes for key storage attributes such as net-to-gross, porosity, and thickness for site-specific risking. The integrated workflow and data integration allowed us to perform an efficient carbon storage site risk assessment as part of an overall ranking process across a portfolio of sites.