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.
Ulven, Ole Ivar and Sun, WaiChing. "Capturing the two-way hydromechanical coupling effect on fluid-driven fracture in a dual-graph lattice beam model." International Journal for Numerical and Analytical Methods in Geomechanics, vol. 42, no. 5, Dec. 2017. https://doi.org/10.1002/nag.2763
Ulven, Ole Ivar, & Sun, WaiChing (2017). Capturing the two-way hydromechanical coupling effect on fluid-driven fracture in a dual-graph lattice beam model. International Journal for Numerical and Analytical Methods in Geomechanics, 42(5). https://doi.org/10.1002/nag.2763
Ulven, Ole Ivar, and Sun, WaiChing, "Capturing the two-way hydromechanical coupling effect on fluid-driven fracture in a dual-graph lattice beam model," International Journal for Numerical and Analytical Methods in Geomechanics 42, no. 5 (2017), https://doi.org/10.1002/nag.2763
@article{osti_1546604,
author = {Ulven, Ole Ivar and Sun, WaiChing},
title = {Capturing the two-way hydromechanical coupling effect on fluid-driven fracture in a dual-graph lattice beam model},
annote = {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},
url = {https://www.osti.gov/biblio/1546604},
journal = {International Journal for Numerical and Analytical Methods in Geomechanics},
issn = {ISSN 0363-9061},
number = {5},
volume = {42},
place = {United States},
publisher = {Wiley},
year = {2017},
month = {12}}
Air Force Office of Scientific Research (AFOSR); Norwegian Research Council; US Army Research Office; USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
NE0008534
OSTI ID:
1546604
Alternate ID(s):
OSTI ID: 1537594
Journal Information:
International Journal for Numerical and Analytical Methods in Geomechanics, Journal Name: International Journal for Numerical and Analytical Methods in Geomechanics Journal Issue: 5 Vol. 42; ISSN 0363-9061
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, Vol. 187, Issue 1009, p. 229-260https://doi.org/10.1098/rspa.1946.0077