Upscaling discrete fracture network simulations: An alternative to continuum transport models

摘要: [1] Particle tracking through stochastically generated networks of discrete fractures provides an alternative to the conventional advection-dispersion description transport in fractured rock. However, fracture network simulations are computationally intensive and usually limited small scales. An approach for direct upscaling is described. Trajectories nonreacting tracer particles first extracted from relatively simulations. Tracer-rock interaction represented by also calculating a cumulative reactivity parameter along each trajectory. The residence time/reactivity information then used Monte Carlo simulation construct artificial particle trajectories any length, thereby achieving objective. In its simplest form procedure has random walk evolving two-dimensional space. Tests using site-specific generic show that it necessary modify produce sequential correlation trajectories. We achieve this state Markov process walk. efficient, easily implemented, compares well with