Hydraulic Fracture Propagation Across a Weak Discontinuity Controlled by Fluid Injection
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In this paper, the authors investigated the problem of a hydraulic fracture propagation through a weakly cohesive frictional discontinuity for different conditions of fracture toughness, in situ stresses, fracture intersection angle, injection parameters and permeability of the pre-existing fracture.Abstract:
We investigated the problem of a hydraulic fracture propagation through a weakly cohesive frictional discontinuity for different conditions of fracture toughness, in situ stresses, fracture intersection angle, injection parameters and permeability of the pre-existing fracture. The parametric sensitivity of the fracture interaction process, in terms of crossing versus arresting of the hydraulic fracture at the discontinuity, was performed using numerical simulations through an extensive parameter space representative of hydraulic fracturing field conditions. The effect of the pre-existing fracture permeability on the crossing behavior was analyzed using a simple analytical model. We showed that the injection rate and viscosity of fracturing fluid are the key parameters controlling the crossing/non-crossing interaction behavior, in addition to already known fracture interaction angle and in-situ stress parameters. We have also found that the pre-existing fracture hydraulic aperture, when as large as that of the hydraulic fracture aperture, has significant influence on the interaction and may more likely cause the hydraulic fracture to arrest.read more
Citations
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Fully Coupled Hydromechanical Simulation of Hydraulic Fracturing in 3D Discrete-Fracture Networks
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Applying complex fracture model and integrated workflow in unconventional reservoirs
Xiaowei Weng,Olga Kresse,Dimitry Chuprakov,Charles-Edouard Cohen,Romain Prioul,Utpal Ganguly +5 more
TL;DR: In this paper, the authors present a comprehensive and yet efficient complex fracture network model that simulates hydraulic fracture networks created during the stimulation treatment and proppant placement in unconventional reservoirs.
Injection-Sensitive Mechanics of Hydraulic Fracture Interaction With Discontinuities
TL;DR: In this paper, the authors developed a new analytical model, called OpenT, that solves the elasticity problem of a hydraulic fracture contact with a pre-existing discontinuity natural fracture (NF) and the condition for HF re-initiation at the NF.
Journal ArticleDOI
Injection-Sensitive Mechanics of Hydraulic Fracture Interaction with Discontinuities
TL;DR: In this paper, the authors developed a new analytical model, called OpenT, that solves the elasticity problem of a hydraulic fracture contact with a pre-existing discontinuity natural fracture (NF) and the condition for HF re-initiation at the NF.
References
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Journal ArticleDOI
On the Crack Extension in Plates Under Plane Loading and Transverse Shear
Fazil Erdogan,G.C. Sih +1 more
Journal ArticleDOI
Strength or toughness? A criterion for crack onset at a notch
TL;DR: In this paper, the incremental form of the energy criterion gives a lower bound of admissible crack lengths, while the stress criterion leads to an upper bound, and the consistency between these two conditions provides a general form of a criterion for crack nucleation.
Influence of geologic discontinuities on hydraulic fracture propagation
N.R. Warpinski,L.W. Teufel +1 more
TL;DR: In this paper, mineback experiments are integrated to describe the complex fracture behavior found and to provide guidelines for predicting when this complex fracturing will occur, which can occur by arresting lateral or vertical propagation of a fracture, reducing total fracture length via fluid leakoff, limiting proppant transport and placement and enhancing the creation of multiple or secondary fractures rather than a single planar hydraulic fracture.
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