My work on modelling of reservoirs includes porous, fractured-and-porous, and fractured reservoirs, that is, using continuum models, dual (double) porosity models, and discontinuum models. This modelling applies to reservoirs of any type, such as those containing ground water, geothermal water, oil, gas, and magma.
My students, colleagues, and I make numerical models where all the three types of models are used and analysed and compared with field data. The main focus, however, is on discontinuum models, and field data on discontinuities (joints, faults, contacts, etc.) and general fracture networks that can be used as a basis for the modelling.
In the past few years, compartments in reservoirs has been of great interest to us. Not only have we considered pressure compartments, but also related those to compartments with different mechanical properties (particularly different Young’s moduli). The compartments then respond in different ways to pressure/stress changes, and modelling these changes becomes a great challenge. Recently, I have extended some of the ideas as regards compartments to magma chambers, as indicated in the cited paper below.
My students and I also work much on unconventional reservoirs, such as shale gas, basement reservoirs and, in particular, intrusions such as sills (and their feeder dykes). Several of my PhD students work on fractured reservoirs and reservoir modelling, both in sedimentary rocks and in igneous rocks (sills) in collaboration with oil companies.
Selected publications on this topic
Gudmundsson, A., 2006. How local stresses control magma-chamber ruptures, dyke injections, and eruptions in composite volcanoes. Earth-Sci. Reviews 79, 1-31.
Larsen, B., Grunnaleite, I., Gudmundsson, A., 2010. How fracture systems affect permeability development in shallow-water carbonate rocks: an example from the Gargano Peninsula, Italy. Journal of Structural Geology doi:10.1016/j.jsg.2009.05.009
Larsen, B., Gudmundsson, A., Grunnaleite, I., Saelen, G., Talbot, M., 2010. Influence of key sedimentary interfaces on fracture pattern, linkage and cluster formation inperitidal carbonate rocks. Mar. Petrol. Geol., 27, 1531-1550.
Larsen, B., Gudmundsson, A., 2010. Linking of fractures in layered rocks: implications for permeability. Tectonophysics doi:10.1016/j.tecto.2010.05.022
Gudmundsson, A., Lotveit, I.F., 2012. Sills as fractured hydrocarbon reservoirs: examples and models. Geol. Soc. Lond. Spec. Publ. Advances in the Study of Fractured Reservoirs Editor: Guy Spence (in press).