Скачать с ютуб Adriana Paluszny - InterPore2023 Invited Lecture: Finite element modelling of the growth and flow в хорошем качестве

Adriana Paluszny - InterPore2023 Invited Lecture: Finite element modelling of the growth and flow

Recorded at Edinburgh International Conference Center on 25 May 2023 Title: Finite element modelling of the growth and flow properties of multiple-scale three-dimensional fracture networks Abstract: The generation and growth of multiple three-dimensional fractures, and fluid flow through the resultant fractured rock mass, is modelled by solving the displacement and flow equations numerically, using the finite element method. The approach uses the Imperial College Geomechanics Toolkit, an in-house C++ 3D simulator that captures coupled thermo-poro-elastic deformation and damage accumulation, while accounting for variable fracture apertures and local transmissivities on the fracture surface, which evolve as a function of deformation. Simulations are able to capture fracture growth at different scales, and model fracture nucleation based on the evaluation of a local damage model. Quasi-static fracture growth is simulated for a number of different stress regimes, making use of a new geometric representation of fractures, based on a novel periodic quadratic polynomial spatial B-spline approach. Surfaces are formed by lofting tip curves during fracture growth, resulting in a low-cost, high-resolution approach. Meshing of the domain uses quadratic quadrilaterals and hexahedra, as opposed to triangles and tetrahedra. The generated fractures are generally non-planar, due to the varying crack-tip stress intensity factors created by stress field interactions between neighboring fractures. Realistic three-dimensional fracture patterns emerge from the simulations, due to nucleation, growth, interaction and intersection of fractures at several scales. Datasets with thousands of geomechanically interacting discrete fractures at different scales will be presented. Fluid flow through the generated fractured rock mass exhibits interesting channeling effects, which are strongly influenced by the stress regime. Bio: Dr Adriana Paluszny is a Senior Lecturer in the Department of Earth Science & Engineering, Imperial College London. She has a PhD in Computational Geomechanics from Imperial College London and has served as a Post-Doctoral Research Associate in the Rio Tinto Centre for Advanced Mineral Recovery at ICL, as a Research Fellow funded by the UK’s Engineering and Physical Sciences Research Council and the UK’s Natural Environment Research Council. She currently holds a Royal Society University Research Fellowship that allows her to conduct research in the area of fracture mechanics and coupled deformation. Adriana is the recipient of the “Chin-Fu Tsang Coupled Processes Award 2019”, and a member of the “Commission on Coupled Thermal-Hydro-Mechanical-Chemical Processes in Fractured Rock” of the International Society for Rock Mechanics and Rock Engineering. Her research is primarily focused on the robust numerical modelling of multiple fracture growth in three dimensions, with applications to geomechanical modelling of fluid injection, hydraulic fracturing, rock drilling, effective permeability of fractured rocks, and emerging methods in computational fracture mechanics. She is interested in understanding how growth is affected by heterogeneities at multiple scales and how the interplay between fluid flow and mechanics affects these interactions. Dr Paluszny is the PI of the SeisGreen project, a large multi-institutional project that seeks to de-risk induced seismicity in the context of large-scale green energy technologies.