Discontinuities in CO2 Storage Reservoirs 

Research topics

WP2: Multiscale identification of mechanical discontinuities, from outcrops to subsurface

Lead: Ane Elisabet Lothe, SINTEF, Norway

Based on the data from outcrops and subsurface, lab work, and machine learning techniques, we will develop methodologies to detect and identify mechanical discontinuities of different scales, going from small scale fractures or bedding planes to large faults at the subsurface.

WP3: Detection and characterization of fractures using seismic waves in the context of CO2 sequestration processes

Lead: Santiago Solazzi, University of Lausanne, Switzerland

Drawing from theoretical and numerical studies as well as experimental results, we will develop new strategies to detect and characterize partially-saturated fractures using seismic waves. Moreover, we will explore the reflectivity of partially saturated fractured media using fluid distributions resulting from two-phase flow experiments in a Hele-Shaw cell.

WP4: Mechanical characterization of mechanical discontinuities

Lead: Diego Manzanal, Universidad Politécnica de Madrid, Spain

Based on extensive experimental work and innovative laboratory tests, we will provide the characterization of mechanical discontinuities, enhance existing constitutive models and propose an evaluation of mechanical discontinuities behavirour under complex stress paths.

WP5: Multiphase flow characterization in fractures

Lead: Pierre Cerasi, SINTEF, Norway

We will use Hele-Shaw cells (introducing walls modifications) to explore the phenomenology of multiphase CO2-brine transport in mechanical discontinuities. The experiments with Hele-Shaw cells allow evaluating flow regimes and their consequences on transport properties in the rock.

WP6: CO2-induced multiphysics couplings in mechanical discontinuities

Lead: Jean-Michel Pereira, Ecole nationale des ponts et chaussées, Paris

We aim to evaluate the response of mechanical discontinuities to contact with CO2 and for that we will conduct laboratory testing of different systems under saturated CO2 atmosphere, develop a theoretical model of pore evolution along the chemo-mechanical interaction and enhance continuum damage constitutive models.

WP7: Applications to CO2 injection modelling in heterogeneous media

Lead: Alain Zanella, Université du Mans, France

To better understand the impact of mechanical discontinuities on fracture geometries and evaluate potential risks associated with CO2 injections, we will run laboratory experiments which will be complemented by numerical modelling and enhanced by mesh independence techniques.

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