Abstract
The objective of the GeoCarbone-Injectivity project was to develop a methodology to study the complex phenomena involved in the near wellbore region during CO2 injection. This paper presents an overview of the program and results of the project, and some further necessary developments. The proposed methodology is based on experiments and simulations at the core scale, in order to understand (physical modelling and definition of constitutive laws) and quantify (calibration of simulation tools) the mechanisms involved in injectivity variations: fluid/rock interactions, transport mechanisms, geomechanical effects. These mechanisms and the associated parameters have then to be integrated in the models at the wellbore scale. The methodology has been applied for the study of a potential injection of CO2 in the Dogger geological formation of the Paris Basin, in collaboration with the other ANR GeoCarbone projects.
Highlights
During the lifetime of a CO2 geological storage operation, large volumes of CO2 will have to be injected through a minimum number of wells, for economical reasons and to minimise leakage risks
CO2 Injectivity in Geological Storages: an Overview of Program and Results of the GeoCarboneInjectivity Project — The objective of the GeoCarbone-Injectivity project was to develop a methodology to study the complex phenomena involved in the near wellbore region during CO2 injection
The proposed methodology is based on experiments and simulations at the core scale, in order to understand and quantify the mechanisms involved in injectivity variations: fluid/rock interactions, transport mechanisms, geomechanical effects
Summary
During the lifetime of a CO2 geological storage operation, large volumes of CO2 will have to be injected through a minimum number of wells, for economical reasons and to minimise leakage risks. The main goal of the “GeoCarbone-Injectivity” project was to develop a methodology to study these complex phenomena involved in the near wellbore region, and to apply it to the context of the Paris Basin which is studied for site screening and characterization within the framework of the companion project “GeoCarbone-PICOREF”. Three main classes of phenomena can be distinguished and justify the project organization: – fluid/rock interactions (Phase 1 of the project), – transport mechanisms (Phase 2), – geomechanical effects (Phase 3). These mechanisms and the associated parameters have to be integrated in the models at the wellbore scale (Phase 4). In-house and commercial softwares were used for the interpretation of these experiments and for simulations of CO2 injection at the wellbore scale
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