Publications, Reports & Research
Our publications, reports and research library hosts over 500 specialist reports and research papers on all topics associated with CCS.
Presentation on Statoil's operational CCS experience and the importance of data sharing.
This paper explores the reservoir features that have proven critical in controlling injection performance at the In Salah geologic carbon sequestration (GCS) project in Algeria. The paper is divided into the three main themes of characterisation: structural geology, fracturing, and pore space characterisation. The authors conclude that structural geological and rock mechanical aspects are most critical in the early injection phase. When considering medium to long term effects, characterisation of the pore space, combined with the dynamically created fracture permeability, becomes more important.
This paper describes an integrated pore-scale modelling approach to reconstruct three reservoir rock samples from Krechba field at the In Salah geologic carbon sequestration (GCS) project in Algeria. Pore scale modelling is an important new tool that includes rock modelling, calculation of petrophysical properties, 2-phase fluid flow simulations and comparison of predicted results with laboratory data. This method of fast and reliable characterisation plays a critical role in CO2 storage modelling by shifting the saturation range for which the CO2 plume is mobile.
This report describes the use of an invasion percolation modelling approach to simulate the CO2 migration process at the Krechba field of the In Salah Storage Site in Algeria. The field-scale model involves 56 million cells with dimensions of 10x10x2 meters. This high-resolution model captures the reservoir heterogeneity with respect to both the fault and fracture distributions. The simulation results are reasonably consistent with the inferred CO2 distribution after 5 years of injection, and indicate that the current distribution of CO2 is principally related to the fracture network. Initial results for predictive simulations of the post-injection period are sensitive to, and principally constrained by, the fault distribution and the multiphase flow behaviour. The simulation results highlight the role that high-resolution heterogeneous field-scale models can play in developing a comprehensive storage monitoring program.
This paper presents the authors’ current knowledge on the characterisation of faults and fractures at the CO2 storage demonstration site at the Krechba natural gas field at In Salah, Algeria. The authors discuss their current understanding of fault and fracture properties at Krechba, which is essential for realistic predictions of CO2 flow behaviour at the site. Furthermore, an extensive monitoring program is underway to improve the characterisation of the Krechba field as storage location and to verify the applicability of a number of monitoring methods for CO2 storage purposes.
This paper describes current and future use of satellite data to monitor and model injection sites at the Krechba natural gas field at In Salah, Algeria. The authors explain the current monitoring programme at Krechba, and the role satellite imagery plays. The authors conclude that experience at In Salah shows that satellite imagery now has the resolution to be a key monitoring technology for onshore storage.