Top 1 Eartharxiv Papers Today in Engineering

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#1. Dynamic modelling of overprinted impermeable fault gouges and surrounding damage zones as lower dimensional interfaces
Thomas Poulet, Martin Lesueur, Ulrich Kelka
In the modelling of subsurface fluid flow, faults are dominant features since they can act as fluid pathways or barriers. Special emphasis is therefore placed in representing them in a numerically efficient manner and the use of lower dimensional domains has become prevalent to simulate higher permeability features like fractures. Such features, however, only represent some of the components of natural fault networks, which can also include rather impermeable fault gouges surrounded by higher permeability damage zones for instance. Here we present a numerical approach to simulate such systems at a large scale, where the thickness of those features makes it advantageous to represent them as discrete rather than continuous domains, using lower dimensional interfaces in a conforming mesh. Benchmarks show excellent agreement with equivalent continuous simulations, regardless of the fault thickness or permeability, both for flow conduits and barriers. This approach can also account for the overprinting of faults with different...
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