Geomechanics for Energy-related Applications
|Prof. Dr Lyesse Laloui (Swiss Federal Institute of Technology, Lausanne, Switzerland)
Dr Alessio Ferrari (Swiss Federal Institute of Technology, Lausanne, Switzerland)
|Petrophysics – Geomechanics|
|5 CPD points|
CONTINUUM MECHANICS ENVIRONMENTAL GEOTHERMAL SATURATION SEQUESTRATION SHALE SOIL TEMPERATURE UNCONVENTIONAL
Geomechanics with multiphase and non-isothermal conditions are found in numerous energy-related engineering applications, such as petroleum engineering, nuclear waste storage engineering, unconventional energy resources and CO2 geological sequestration. These applications require an understanding of the behaviour of the involved geomaterials (soils, rocks, shales) and an increased ability to predict their behaviours in variable situations.
The course provides an insight on modern trends in geomechanics for dealing with geomaterials in multiphase and non-isothermal conditions. The course introduces the basic concepts for the characterization of the materials and their numerical modelling. The multiphase composition of the involved geomaterials and the concept of REV for a continuum mechanics approach are recalled. Modern techniques for testing the materials under coupled (thermo-hydro-chemical-mechanical) conditions are introduced. The available evidences for the effects of the changes in the degree of saturation and temperature are summarized, providing the attendances with the possibility to anticipate the behaviours of geomaterials under non-isothermal and partially saturated conditions. Mathematical models are then presented to cope with these complex physical interactions in a quantitative manner and to be able to predict the behaviour of the materials in such conditions. Energy-related engineering applications are finally presented to show how the knowledge gathered with the course can be applied when dealing with complex natural and man-made systems.
Upon completion of the course, participants will have a first-order understanding of the rheological behaviour of soils, shales and rocks under a variety of saturation conditions and temperature variations. Fundamental constitutive concepts will be well understood and a basic knowledge on the numerical simulation of geomechanical problems will be gained.
- Introduction to geomechanics
- Multiphase composition of geomaterials
- Multiphysical testing of geomaterials
- Behaviour of geomaterials in variable saturation conditions
- Behaviour of geomaterials in non-isothermal conditions
- Mathematical modelling of multiphase geomaterials — REV concept
- Elasticity and elasto-palsticity; critical state concept
- Effective stress concept for multiphase systems
- Constitutive modelling for multiphase geomaterials including temperature-dependency
- Thermo-hydro-mechanical coupling for geomaterials: governing equations
- Energy-related engineering applications
The course is designed for postgraduate students, researchers and practitioners in fields where multiphase and non-isothermal behaviour of geomaterials (soils, rocks and shales) plays a fundamental role, such as petroleum engineering, unconventional energy resources, nuclear waste storage engineering and CO2 geological sequestration.
Participants should have basic knowledge of soil and/or rock mechanics is required.
About the instructors
Dr Lyesse Laloui is chair professor at the Swiss Federal Institute of Technology, EPFL, Lausanne. He is also adjunct professor at Duke University, USA. Prior to joining EPFL, he was post-doctoral fellow at Ecole Centrale Paris. He was visiting professor in France, Germany, Australia, Italy, USA (including the MTS Distinguished Visiting Professorship, University of Minnesota). He published 6 books and more than 230 papers including 98 journal papers, 15 chapters in books, 114 conference proceedings papers. He was a guest editor for 6 special journal issues and one ASCE GSP (Geotechnical Special Publication). Following Scopus, his work is cited more than 700 times. He gave keynote and invited lectures at a number of conferences and he is responsible for $7.6 million in research funding. He was the vice-director of the European Alert Geomaterials network and is a member of the Editorial board of five international journals. He is the recipient of the Excellent Contributions Award of the International Association for Computer Methods and Advances in Geomechanics, IACMAG, 2008, and the 2012 Vardoulakis Lecture. Dr. Laloui’s main research interests are in Geomechanics (Constitutive modelling and numerical multiphysical coupling processes, laboratory advanced testing), and Environmental and Energy Sustainability (Nuclear waste underground storage, Petroleum Geomechanics, CO2 Geological Sequestration, Geothermal Energy).
Dr Alessio Ferrari is research associate at the Swiss Federal Institute of Technology in Lausanne (EPFL, Switzerland) since 2009. He earned an MSc in Environmental Engineering and a PhD in Geotechnical Engineering. He was appointed as a Marie-Curie post-doctoral fellow at the EPFL and at the Polytechnic University of Catalonia (UPC, Spain). His current main research interests are in geomechanics for man-made and natural systems (thermo-hydro-chemo-mechanical behaviour of geomaterials, development of advanced testing facilities, pore scale testing, and natural hazard assessment). He is lecturer of the course in “Experimental Geomechanics” at the EPFL.
Explore other courses under this discipline:
Instructors: Prof. Dr Franek Hasiuk and Dr Sergey Ishutov (Iowa State University)
3D printing is an emerging tool in the geoscience research, reservoir characterization, education, and technical communication. This course covers fundamentals of available techniques and materials for 3D printing and their relative merits. Participants will learn about applications of 3D printing in studies of reservoir rocks, fossils, and geomorphology. The practical section of the course will allow participants: 1) to design 3D-printable models of reservoir rocks that contain pore and fracture networks using CAD and computed tomography data; 2) to render 3D terrain models using GIS data; and 3) to test the accuracy of digital and 3D-printed models.
Instructor: Prof. Dr Michael Poppelreiter (University Technology Petronas)
Hands-on microfacies characterization using industry data sets. Analysis: mineralogy, components, pore types, diagenesis. Participants are instructed on how to capture observations such that patterns and rules might be detected. The course encourages participants to think of processes and products during thin section characterization. Industry data sets are used to illustrate the use of microfacies characterization to help solve operational issues of carbonate fields. Production increase is demanded. Wells (fully cored) show contrary production behavior. The stratigraphy is ‘layer cake’ and both wells are perforated in the highest perm interval of a few meters thick. Thin sections are linked with petrophysical data, openhole logs and production data. Course participants are encouraged to use thin section descriptions to develop a conceptual model for permeability based on a depositional model architecture based on the investigation of available this sections.
Instructor: Prof. Mark Knackstedt (FEI Lithicon)
Digital rock technology offers promise to overcome limitations of conventional core flooding – in particular, sensitivity to coring, core preservation, handling and preparation procedures. This course will provide an in-depth description of digital rock analysis techniques with an emphasis on the fundamentals, tools and practical methods utilized in this workflow. Advanced methods and current limitations will also be discussed. The course will then highlight how this technology can aid the geoscientist and reservoir engineer today by complementing traditional measurements and using the results intelligently to predict and interpret field-scale recovery processes. We describe examples where reconciliation and integration of the different types of data from a fundamental understanding of the pore scale has added value. In particular, the work is used to offer fast turnaround times, aided in our understanding of unconventional reservoir core material and to explain uncertainties and trends from laboratory measurements (e.g., issues with heterogeneity, representative elemental volume, wettability, distribution of remaining oil saturation, EOR processes). We conclude with a discussion on how to extend this technology for reliable prediction of petrophysical & SCAL data along continuous lengths of core material and to integrate the data with other forms of data at increasingly larger scales (log characterization, geomodels and ultimately reservoir simulators).
Instructors: Dr Per Avseth (Independent Consultant) and Prof. Dr Tor Arne Johansen (University of Bergen)
The field of rock physics represents the link between qualitative geologic parameters and quantitative geophysical measurements. Increasingly over the last decade, rock physics stands out as a key technology in petroleum geophysics, as it has become an integral part of quantitative seismic interpretation. Ultimately, the application of rock physics tools can reduce exploration risk and improve reservoir forecasting in the petroleum industry.
Instructor: PhD José M. Carcione (OGS)
This course presents the fundamentals of physics and numerical simulation of wave propagation in anisotropic, anelastic and porous media, including the analogy between acoustic waves (in the general sense) and electromagnetic (EM) waves. The emphasis is on geophysical applications for hydrocarbon exploration, but researchers in the fields of earthquake seismology, rock physics, and material science. Moreover, the course illustrates the use of seismic and EM modelling, with an account of the numerical algorithms for computing the synthetic seismograms and radargrams, including applications in the field of geophysical prospecting, seismology and rock physics, such as evaluation of methane hydrate content, upscaling techniques, detection of overpressure, Antarctic and permafrost exploration, exploration of the Earths deep crust, time-lapse for monitoring of CO2 injection, etc.
Instructor: Prof. Tapan Mukerji (Stanford University)
This course covers fundamentals of Rock Physics ranging from basic laboratory and theoretical results to practical “recipes” that can be immediately applied in the field. Application of quantitative tools for understanding and predicting the effects of lithology, pore fluid types and saturation, saturation scales, stress, pore pressure and temperature, and fractures on seismic velocity. We will present case studies and strategies for quantitative seismic interpretation using statistical rock physics work flows, and suggestions for more effectively employing seismic-to-rock properties transforms in Bayesian machine learning for reservoir characterization and monitoring, with emphasis on seismic interpretation and uncertainty quantification for lithology and subsurface fluid detection.