Experimental and analytical assessment of Draupne shale seal integrity for CO2 storage sites

Abstract

Carbon dioxide (CO2) capture and storage is one of the most important measures to reduce the atmospheric concentration of CO2. To ensure safe storage, operations must be conducted in way that respects operational limitations. Furthermore, the operational limitations should be based on models appropriately accounting for relevant material properties and in-situ stress conditions. In this study, we combine various experimental approaches on the Draupne shale to get a more complete picture of the properties of intact and naturally fractured samples and to evaluate the feasibility of using passive seismic to monitor this North Sea caprock. The measured properties combined with in-situ stresses are used to calculate stresses acting on arbitrarily oriented fractures and associated stabilities using an in-house developed software.

Experimental and analytical assessment of Draupne shale seal integrity for CO2 storage sites