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Injection-Sensitive Mechanics of Hydraulic Fracture Interaction with Discontinuities

Chuprakov, D. ; Melchaeva, O. ; Prioul, R.

Rock mechanics and rock engineering, 2014-09, Vol.47 (5), p.1625-1640 [Periódico revisado por pares]

Vienna: Springer Vienna

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Título:
Injection-Sensitive Mechanics of Hydraulic Fracture Interaction with Discontinuities
Autor: Chuprakov, D. ; Melchaeva, O. ; Prioul, R.
Assuntos: Applied sciences ; Buildings. Public works ; Civil Engineering ; Computation methods. Tables. Charts ; Computational fluid dynamics ; Crack initiation ; Discontinuity ; Earth and Environmental Science ; Earth Sciences ; Exact sciences and technology ; Fluid flow ; Fracture mechanics ; Geophysics/Geodesy ; Geotechnics ; Hydraulic fracturing ; Hydraulics ; Intersections ; Mathematical models ; Original Paper ; Sensitivity analysis ; Soil mechanics. Rocks mechanics ; Structural analysis. Stresses ; Water effect, drainage, ground water lowering, filtration
É parte de: Rock mechanics and rock engineering, 2014-09, Vol.47 (5), p.1625-1640
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: We develop a new analytical model, called OpenT, that solves the elasticity problem of a hydraulic fracture (HF) contact with a pre-existing discontinuity natural fracture (NF) and the condition for HF re-initiation at the NF. The model also accounts for fluid penetration into the permeable NFs. For any angle of fracture intersection, the elastic problem of a blunted dislocation discontinuity is solved for the opening and sliding generated at the discontinuity. The sites and orientations of a new tensile crack nucleation are determined based on a mixed stress- and energy-criterion. In the case of tilted fracture intersection, the finite offset of the new crack initiation point along the discontinuity is computed. We show that aside from known controlling parameters such stress contrast, cohesional and frictional properties of the NFs and angle of intersection, the fluid injection parameters such as the injection rate and the fluid viscosity are of first-order in the crossing behavior. The model is compared to three independent laboratory experiments, analytical criteria of Blanton, extended Renshaw−Pollard, as well as fully coupled numerical simulations. The relative computational efficiency of OpenT model (compared to the numerical models) makes the model attractive for implementation in modern engineering tools simulating hydraulic fracture propagation in naturally fractured environments.
Editor: Vienna: Springer Vienna
Idioma: Inglês

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Injection-Sensitive Mechanics of Hydraulic Fracture Interaction with Discontinuities

Chuprakov, D. ; Melchaeva, O. ; Prioul, R.

Vienna: Springer Vienna

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