9. Seal properties database
A key issue for storage site evaluation is the assessment of seal efficacy, but data on seal rock properties relevant for CO2 storage are scarce when compared to reservoir rock property data.
Prediction of seal efficacy requires data on lithology, on properties related to fluid flow as well as on geochemical and geomechanical properties. Some of these properties are difficult or expensive to measure directly.
To assess the current state of information and define knowledge gaps, a seal rock properties database was created combining available data of network partners and other published data. This relational database contains analytical results obtained from claystones and shales that may be considered as prototypes of potential seals (cap rocks) for CO2 repositories.
Logical data model of the seal properties database.
Most sampling sites are located in the UK (onshore coreholes), the Netherlands (onshore coreholes and offshore wells) and Belgia (onshore coreholes). Some literature data from German outcrops, and exploration wells in Germany, Norway, the US, Oman and off NW Java were also included.
The database in its present form mainly contains analytical and experimental results from well and core samples including physical, inorganic geochemical, organic geochemical, mechanical and flow-related data.
The data can be extracted from the database for statistical analysis etc. using the associated Microsoft Access application or the user’s own SQL queries.
For more information please contact:
Hermann Weiss at SINTEF Petroleum Research