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Stress- and fluid-driven failure during fracture array growth: Implications for coupled deformation and fluid flow in the crust

2010; Geological Society of America; Volume: 38; Issue: 9 Linguagem: Inglês

10.1130/g31010.1

1943-2682

Auke Barnhoorn, S. F. J. Cox, David J. Robinson, Tim J. Senden,

CO2 Sequestration and Geologic Interactions

Research Article| September 01, 2010 Stress- and fluid-driven failure during fracture array growth: Implications for coupled deformation and fluid flow in the crust Auke Barnhoorn; Auke Barnhoorn * 1Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia2Faculty of Geosciences, Utrecht University, 3508 TC Utrecht, Netherlands *E-mail: auke.barnhoorn@geo.uu.nl. Search for other works by this author on: GSW Google Scholar Stephen F. Cox; Stephen F. Cox 1Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia Search for other works by this author on: GSW Google Scholar David J. Robinson; David J. Robinson 1Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia3Risk and Impact Analysis Group, Geoscience Australia, Canberra, ACT 2601, Australia Search for other works by this author on: GSW Google Scholar Tim Senden Tim Senden 4Department of Applied Mathematics, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia Search for other works by this author on: GSW Google Scholar Geology (2010) 38 (9): 779–782. https://doi.org/10.1130/G31010.1 Article history received: 11 Jan 2010 rev-recd: 23 Mar 2010 accepted: 28 Mar 2010 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Auke Barnhoorn, Stephen F. Cox, David J. Robinson, Tim Senden; Stress- and fluid-driven failure during fracture array growth: Implications for coupled deformation and fluid flow in the crust. Geology 2010;; 38 (9): 779–782. doi: https://doi.org/10.1130/G31010.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Brittle experimental deformation on dolomite rocks shows for the first time the difference in growth of fracture networks by ordinary percolation and invasion percolation processes. Stress-driven fracture growth, in the absence of fluid pressure, is an ordinary percolation process characterized by distributed nucleation and growth of microfractures, which coalesce with increasing strain to form a connected fracture network. Fluid pressure–driven fracture growth is more akin to an invasion percolation process characterized by preferential fracture growth occurring initially at the high fluid pressure part of the rock. With progressive deformation, the network propagates rapidly through the sample and away from the high fluid pressure reservoir. X-ray microtomography analysis suggests that the fracture network in three dimensions (3-D) is probably a fully connected network at peak stress conditions, whereas conventional 2-D analysis suggests that connectivity only occurs at shear failure. The development of 3-D fracture connectivity prior to shear failure has important implications for fluid flow and fluid pressure changes immediately prior to rupture nucleation in active fault zones, for fluid migration in ore-producing hydrothermal systems, and for reservoir integrity in hydrocarbon systems. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.