Example of detailed model for fluvial facies
GEUS is using Petrel™ for modelling reservoirs, incorporating data from a number of different scales, ranging from core data to seismic information. Modelling sessions and decisions about model size, gridding scheme and boundary conditions, are always guided by the ultimate purpose of the constructed model, whether it is for simple data display, volumetric calculations or dynamic flow simulation. The produced models are easily integrated with flow modelling in Eclipse™.
The three main issues for modelling are related to integration, data re-scaling, and uncertainty handling. The integration is concerned with the combination of the structural framework and the property model, and how these are updated consistently. The data-rescaling is needed when data from different measurement methods are combined for a common volume support in the model grid. The uncertainty handling needs to be based on a combination of deterministic scenario-based model suites and stochastic methods for reflecting variability within each scenario. This SmartModel workflow combines a balance between the two model processes, but still needs well-informed user decisions to avoid biased representation.
The relations between different types of data and data from different scales are studied as a preparation to the inclusion in the model. If individual parameters are derived from different measurements at different scales, the consistency of the model input can be studied by using the scaling laws. As an example porosity can be derived from core plug analysis, well log interpretation and from seismic inversion. The support volume for these data varies from cubic-centimeters for the core plugs to hundreds of cubic-meters for the seismic resolution in inversions.
Illustration of data types from different length scales in chalk reservoirs (Frykman 2005, 2006)
The incorporation of the structural architecture in the geological model is useful for analysis of lateral connectivity and for evaluation of potential vertical flow pathways through faults and fracture corridors.
Reservoir model of the Vedsted structure with porosity layering and structural framework (Frykman et al. 2011)
Ketzin storage pilot for CO2 injection. Participation in EU-project CO2SINK (2006-2012)
Vedsted CO2 storage project. Consulting for Vattenfall A/S on geological modelling and simulation of injection operation (2009-2011)
Hanstholm CO2 storage project. Nordic Energy Research support for NORDICCS (20014-2015)
Reservoir model for analysing trapping mechanisms for injected CO2. EU-projects: CO2CARE (2012-2014), CO2ReMoVe (2011-2014)
Heterogeneity models for analysing convection mechanisms during CO2 storage. The Research Council of Norway: BIGCCS (2010-2016)
Convection process in heterogeneous model
Frykman, P., Wessel-Berg, D. 2013: Dissolution trapping - convection enhancement limited by geology. 12th International Conference on Greenhouse Gas Control Technologies, GHGT-12. Energy Procedia 63, 5467-5478.
Mbia, E.N., Frykman, P., Nielsen, C.M., Fabricius, I.L., Pickup, G.E., Sørensen, A.T. 2014: Modeling of the pressure propagation due to CO2 injection and the effect of fault permeability in a case study of the Vedsted structure, Northern Denmark. International Journal of Greenhouse Gas Control 28, 1-10.
Norden, B., Frykman, P. 2013: Geological modelling of the Triassic Stuttgart Formation at the Ketzin CO2 storage site, Germany. International Journal of Greenhouse Gas Control 19, 756-774.
Nielsen, C.M., Frykman, P. 2012: Regional model development and study of pressure propagation. Energy Procedia 23, 495-503.
Frykman, P., Nielsen, C.M., Dalhoff, F., Sørensen, A.T., Klinkby, L., Nielsen, L.H. 2011: Geological modelling for site evaluation at the Vedsted structure, NW Denmark. Energy Procedia 4, 4711-4718.
Persons to contact
Advanced Flow ModellerCarsten M. Nielsen
Phone: +45 9133 3761
Senior Research Geologist
Local Modelling ChampionPeter Frykman
Phone: +45 9133 3775