Displaying Items By Tag: Hydraulic Fracture Propagation

  1. Home
  2. Displaying items by tag: hydraulic fracture propagation
Seequent, The Bentley Subsurface Company's Mastering SLOPE/W: Dynamic Stability with the Newmark Method begins on Mar 29th 2023
More
Create a free account and view content that fits your specific interests in geotechnical engineering Learn More
Register

Publications on hydraulic fracture propagation

Initiation and Breakdown of an Axisymmetric Hydraulic Fracture Transverse to a Horizontal Wellbore
S. Abbas ; B. Lecampion
Book Title / Journal: Effective and Sustainable Hydraulic Fracturing - Chapter 19
Year: 2013
Mining ; Other Geotechnical
Keywords: axisymmetric hydraulic fracture ; hydraulic fracture propagation
  • Description
    • We investigate the initiation and early-stage propagation of an axi-symmetric hydraulic fracture from a wellbore drilled in the direction of the minimum principal stress in an elastic and impermeable formation. Such a configuration is akin to the case of a horizontal well and a hydraulic fracture transverse to the well axis in an open hole completion. In addition to the effect of the wellbore on the elasticity equation, the effect of the injection system compressi‐ bility is also taken into account. The formulation accounts for the strong coupling between the elasticity equation, the flow of the injected fluid within the newly created crack and the fracture propagation condition. Dimensional analysis of the problem reveals that three di‐ mensionless parameters control the entire problem: the ratio of the initial defect length over the wellbore radius, the ratio between the wellbore radius and a length-scale associated with the fluid stored by compressibility in the injection system during the well pressurization, and finally the ratio of the time-scale of transition from viscosity to toughness dominated propagation to the time-scale associated with compressibility effects. A fully coupled nu‐ merical solver is presented, and validated against solutions for a radial hydraulic fracture propagating in an infinite medium. The influence of the different parameters on the transi‐ tion from the near-wellbore to the case of a hydraulic fracture propagating in an infinite me‐ dium is fully discussed.
PDF
Hydraulic Fracture Propagation Across a Weak Discontinuity Controlled by Fluid Injection
D. Chuprakov ; O. Melchaeva ; R. Prioul
Book Title / Journal: Effective and Sustainable Hydraulic Fracturing - Chapter 8
Year: 2013
Rock Mechanics ; Mining
Keywords: discontinuity ; fluid injection ; hydraulic fracture propagation
  • Description
    • The present chapter investigates 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.
PDF

TOP TAGS

CivilEngineer 574 Bentley 321 International 215 Landslide 149 Plaxis 140