The identification of a suitable storage site for CO2 is fundamental to a viable CCS methodology. In
this chapter we describe a workflow for the process of identification, interpretation and geological
modelling of a potential aquifer storage site.
The construction of a valid and testable geological model is an essential pre-requisite to carrying out
any reservoir simulation of CO2 flow and storage capacity modelling.
A well constructed model enhances confidence in the numerical simulations and monitorability
assesment and importantly, also delivers a visual understanding of the sub-surface to the nongeologist.
Geologists visualise geology in 3D and previously have translated this onto 2D maps and sections.
Modern technology now permits the routine construction of digital models at all scales and for these
to be exported to other software packages. The construction of models based on limited data is, by
necessity, open to multiple interpretation; and one of the key outcomes of our investigation has
been to recognise the importance of the development and early application of a set of first response
tools for geological interpretation and storage modelling. Use of this methodology and tool set
should lead to best available data analysis, improved decision making and confidence in reservoir
simulation (see Glossary for a full definition of terms used in this chapter)
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