skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Robust system size reduction of discrete fracture networks: a multi-fidelity method that preserves transport characteristics

Journal Article · · Computational Geosciences

In this paper, we propose a multi-fidelity system reduction technique that uses weighted graphs paired with three-dimensional discrete fracture network (DFN) modelling for efficient simulation of subsurface flow and transport in fractured media. DFN models are used to simulate flow and transport in subsurface fractured rock with low-permeability. One method to alleviate the heavy computational overhead associated with these simulations is to reduce the size of the DFN using a graph representation of it to identify the primary flow sub-network and only simulate flow and transport thereon. The first of these methods used unweighted graphs constructed solely on DFN topology and could be used for accurate predictions of first-passage times. However, these techniques perform poorly when predicting later stages of the mass breakthrough. We utilize a weighted-graph representation of the DFN where edge weights are based on hydrological parameters in the DFN that allows us to exploit the kinematic quantities derivable a posteriori from the flow solution obtained on the graph representation of the DFN to perform system reduction and predict the later stages of the breakthrough curve with high fidelity. We also propose and demonstrate the use of an adaptive pruning algorithm with error control that produces a pruned DFN sub-network whose predicted mass breakthrough agrees with the original DFN within a user-specified tolerance. Lastly, the method allows for the level of accuracy to be a user-controlled parameter.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1477661
Report Number(s):
LA-UR-18-23489
Journal Information:
Computational Geosciences, Vol. 22, Issue 6; ISSN 1420-0597
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

References (47)

Extracting Hydrocarbon From Shale: An Investigation of the Factors That Influence the Decline and the Tail of the Production Curve journal May 2018
A comparative study of discrete fracture network and equivalent continuum models for simulating flow and transport in the far field of a hypothetical nuclear waste repository in crystalline host rock journal October 2017
Multi-scale finite-volume method for elliptic problems in subsurface flow simulation journal May 2003
Multiscale direction-splitting algorithms for parabolic equations with highly heterogeneous coefficients journal September 2016
Dispersion and Mixing in Three‐Dimensional Discrete Fracture Networks: Nonlinear Interplay Between Structural and Hydraulic Heterogeneity journal May 2018
A Parallel Solver for Large Scale DFN Flow Simulations journal January 2015
Inclusion of Topological Measurements into Analytic Estimates of Effective Permeability in Fractured Media: FRACTURE PERMEABILITY FROM TOPOLOGY journal November 2017
A particle tracking transport method for the simulation of resident and flux-averaged concentration of solute plumes in groundwater models journal May 2010
Topology of fracture networks journal January 2013
Machine learning for graph-based representations of three-dimensional discrete fracture networks journal January 2018
Influence of injection mode on transport properties in kilometer-scale three-dimensional discrete fracture networks: INFLUENCE OF INJECTION MODE IN 3-D DFNs journal September 2015
The Origin, Prediction and Impact of Oil Viscosity Heterogeneity on the Production Characteristics of Tar Sand and Heavy Oil Reservoirs journal January 2008
A mixed hybrid Mortar method for solving flow in discrete fracture networks journal October 2010
A PDE-Constrained Optimization Formulation for Discrete Fracture Network Flows journal January 2013
PFLOTRAN User Manual: A Massively Parallel Reactive Flow and Transport Model for Describing Surface and Subsurface Processes report January 2015
A Multiscale Finite Element Method for Elliptic Problems in Composite Materials and Porous Media journal June 1997
A quasi steady state method for solving transient Darcy flow in complex 3D fractured networks journal January 2012
Upscaling discrete fracture network simulations: An alternative to continuum transport models: UPSCALING FRACTURE NETWORK SIMULATIONS journal February 2005
Advancing Graph-Based Algorithms for Predicting Flow and Transport in Fractured Rock journal September 2018
Particle tracking approach for transport in three-dimensional discrete fracture networks: Particle tracking in 3-D DFNs journal September 2015
Flow channeling in heterogeneous fractured rocks journal May 1998
Predictions of first passage times in sparse discrete fracture networks using graph-based reductions journal July 2017
Fracture size and transmissivity correlations: Implications for transport simulations in sparse three-dimensional discrete fracture networks following a truncated power law distribution of fracture size: FRACTURE SIZE AND TRANSMISSIVITY CORRELATIONS journal August 2016
Effect of advective flow in fractures and matrix diffusion on natural gas production journal October 2015
dfnWorks: A discrete fracture network framework for modeling subsurface flow and transport journal November 2015
A Large-Scale Flow and Tracer Experiment in Granite: 2. Results and Interpretation journal December 1991
Derivation of equivalent pipe network analogues for three-dimensional discrete fracture networks by the boundary element method journal September 1999
A Generalized Mixed Hybrid Mortar Method for Solving Flow in Stochastic Discrete Fracture Networks journal January 2012
A New Approach to Simulating Flow in Discrete Fracture Networks with an Optimized Mesh journal January 2007
Connectivity, permeability, and channeling in randomly distributed and kinematically defined discrete fracture network models: PERMEABILITY OF DISCRETE FRACTURE NETWORK journal November 2016
A Generalized Darcy–Dupuit–Forchheimer Model with Pressure-Dependent Drag Coefficient for Flow Through Porous Media Under Large Pressure Gradients journal January 2016
A methodology for the characterization of flow conductivity through the identification of communities in samples of fractured rocks journal February 2014
Understanding hydraulic fracturing: a multi-scale problem
  • Hyman, J. D.; Jiménez-Martínez, J.; Viswanathan, H. S.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 374, Issue 2078 https://doi.org/10.1098/rsta.2015.0426
journal October 2016
Conforming Delaunay Triangulation of Stochastically Generated Three Dimensional Discrete Fracture Networks: A Feature Rejection Algorithm for Meshing Strategy journal January 2014
Power-law velocity distributions in fracture networks: Numerical evidence and implications for tracer transport: POWER-LAW VELOCITY DISTRIBUTIONS IN FRACTURE NETWORKS journal July 2002
Scaling of fracture systems in geological media journal August 2001
Flux formulation of parabolic equations with highly heterogeneous coefficients journal October 2018
On the physical meaning of the dispersion equation and its solutions for different initial and boundary conditions journal January 1978
A thermodynamic basis for the derivation of the Darcy, Forchheimer and Brinkman models for flows through porous media and their generalizations journal January 2014
Pathline tracing on fully unstructured control-volume grids journal July 2012
Flow Simulation in Three-Dimensional Discrete Fracture Networks journal January 2009
Modeling flow and transport in fracture networks using graphs journal March 2018
Quantifying Topological Uncertainty in Fractured Systems using Graph Theory and Machine Learning journal August 2018
Identifying Backbones in Three-Dimensional Discrete Fracture Networks: A Bipartite Graph-Based Approach journal January 2018
The Origin, Prediction and Impact of Oil Viscosity Heterogeneity on the Production Characteristics of Tar Sand and Heavy Oil Reservoirs conference April 2013
Machine learning for graph-based representations of three-dimensional discrete fracture networks text January 2017
Modeling flow and transport in fracture networks using graphs text January 2017

Cited By (2)

Model reduction for fractured porous media: a machine learning approach for identifying main flow pathways journal March 2019
Machine learning for data-driven discovery in solid Earth geoscience journal March 2019

Figures / Tables (10)