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Modeling of fracture opening by explosive products
, Settgast R.R., Vorobiev O.Y., Morris J.P., Herbold E.B., Homel M.A.
Published in American Rock Mechanics Association (ARMA)
Volume: 5
Pages: 3677 - 3682
In traditional hydraulic fracturing stimulation, the effective conductivity of low permeability rock is increased by generating/activating fractures through injection of pressurized fluid. One possible extension of traditional hydraulic fracturing is to increase the loading rate that the driving fluid applies on the formation. Methods that use dynamic loading potentially extend stimulation to previously inaccessible geological resources. In contrast to pump-driven hydraulic fracturing methods, dynamic stimulation can generate stresses in the source region that may be significantly larger than the in-situ stress, which helps to create fractures that may grow in directions other than that of the minimum in-situ stress. Furthermore, the increased loading rate has potential to generate fractures in relatively ductile formations. With dynamic loading, fractures are initially generated by the diverging stress wave propagating from the energy release zone. It has been shown that the crack area and final extent depend on the ability of explosive products to flow into cracks after wave propagation. Here we investigate the potential for crack generation from stress waves, and the opening of those cracks via the flow of explosive product gases into the cracks by developing a coupled Finite Element (FE) and Godunov scheme for fluid-solid interactions. © 2017 ARMA, American Rock Mechanics Association.
About the journal
Journal51st US Rock Mechanics / Geomechanics Symposium 2017
PublisherAmerican Rock Mechanics Association (ARMA)
Open AccessNo