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Title: Capturing the two-way hydromechanical coupling effect on fluid-driven fracture in a dual-graph lattice beam model

Abstract

Fluid-driven fractures of brittle rock is simulated via a dual-graph lattice model. The new discrete hydromechanical model incorporates a two-way coupling mechanism between the discrete element model and the flow network. Through adopting an operator-split algorithm, the coupling model is able to replicate the transient poroelasticity coupling mechanism and the resultant Mandel-Cryer hydromechanical coupling effect in a discrete mechanics framework. As crack propagation, coalescence and branching are all path-dependent and irreversible processes, capturing this transient coupling effect is important for capturing the essence of the fluid-driven fracture in simulations. Injection simulations suggest that the onset and propagation of fractures is highly sensitive to the ratio between the injection rate and the effective permeability. Moreover, we show that in a permeable rock, the borehole breakdown pressure, the pressure at which fractures start to grow from the borehole, depends on both the given ratio between injection rate and permeability and the Biot coefficient.

Authors:
ORCiD logo [1];  [2]
  1. Univ. of Oslo (Norway)
  2. Columbia Univ., New York, NY (United States)
Publication Date:
Research Org.:
Columbia Univ., New York, NY (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE); Norwegian Research Council; US Army Research Office; US Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1546604
Grant/Contract Number:  
NE0008534; FA9550-17-1-0169; W911NF-15-1-0442; W911NF-15-1-0581; EAR-1520732
Resource Type:
Accepted Manuscript
Journal Name:
International Journal for Numerical and Analytical Methods in Geomechanics
Additional Journal Information:
Journal Volume: 42; Journal Issue: 5; Journal ID: ISSN 0363-9061
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
dual graph; fluid‐driven fracture; lattice method; operator split; poroelasticity

Citation Formats

Ulven, Ole Ivar, and Sun, WaiChing. Capturing the two-way hydromechanical coupling effect on fluid-driven fracture in a dual-graph lattice beam model. United States: N. p., 2017. Web. doi:10.1002/nag.2763.
Ulven, Ole Ivar, & Sun, WaiChing. Capturing the two-way hydromechanical coupling effect on fluid-driven fracture in a dual-graph lattice beam model. United States. doi:10.1002/nag.2763.
Ulven, Ole Ivar, and Sun, WaiChing. Wed . "Capturing the two-way hydromechanical coupling effect on fluid-driven fracture in a dual-graph lattice beam model". United States. doi:10.1002/nag.2763. https://www.osti.gov/servlets/purl/1546604.
@article{osti_1546604,
title = {Capturing the two-way hydromechanical coupling effect on fluid-driven fracture in a dual-graph lattice beam model},
author = {Ulven, Ole Ivar and Sun, WaiChing},
abstractNote = {Fluid-driven fractures of brittle rock is simulated via a dual-graph lattice model. The new discrete hydromechanical model incorporates a two-way coupling mechanism between the discrete element model and the flow network. Through adopting an operator-split algorithm, the coupling model is able to replicate the transient poroelasticity coupling mechanism and the resultant Mandel-Cryer hydromechanical coupling effect in a discrete mechanics framework. As crack propagation, coalescence and branching are all path-dependent and irreversible processes, capturing this transient coupling effect is important for capturing the essence of the fluid-driven fracture in simulations. Injection simulations suggest that the onset and propagation of fractures is highly sensitive to the ratio between the injection rate and the effective permeability. Moreover, we show that in a permeable rock, the borehole breakdown pressure, the pressure at which fractures start to grow from the borehole, depends on both the given ratio between injection rate and permeability and the Biot coefficient.},
doi = {10.1002/nag.2763},
journal = {International Journal for Numerical and Analytical Methods in Geomechanics},
number = 5,
volume = 42,
place = {United States},
year = {2017},
month = {12}
}

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