DEM simulation of normal faults in cohesive materials

Abe, Steffen; Gent, Heijn van; Urai, János L.

doi:10.1016/j.tecto.2011.09.008

Cited by 60 publications

(44 citation statements)

References 22 publications

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“…Such tests are performed on a subpart of the system in order to evaluate multiple sets of particle property values within acceptable runtimes (Oger et al, 1998;Finch et al, 2004;Holohan et al, 2011). Similarly, the sensitivity of models to subtle initial differences in, e.g., assembly packing is well known (Abe et al, 2011). Even with meticulous and precise work, the calibration process can lead to results slightly different from similar finite element models (Gray et al, 2014;Zhang et al, 2013).…”

Section: Mechanical Modelingmentioning

confidence: 99%

From mechanical modeling to seismic imaging of faults: A synthetic workflow to study the impact of faults on seismic

Botter

Cardozo

Hardy

et al. 2014

Marine and Petroleum Geology

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Section: Mechanical Modelingmentioning

confidence: 99%

From mechanical modeling to seismic imaging of faults: A synthetic workflow to study the impact of faults on seismic

Botter

Cardozo

Hardy

et al. 2014

Marine and Petroleum Geology

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“…They form major pathways for fluid flow, such as water, hydrocarbons or magma, and consequently are of great interest for water and energy supply, geohazard assessment and geodynamics (e.g., Belayneh et al, 2006;Caine et al, 1996;Crone and Haller, 1991;Ehrenberg and Nadeau, 2005;Gudmundsson et al, 2001;Lonergan et al, 2007). Several first-order models for the formation of dilatant fault networks exist (e.g., Abdelmalak et al, 2012;Abe et al, 2011;Acocella et al, 2003;Grant and Kattenhorn, 2004;Hardy, 2013;Holland et al, 2006Holland et al, , 2011van Gent et al, 2010;Vitale and Isaia, 2014;Walter and Troll, 2001). However, the influence of pre-existing cohesionless joints on the formation of faults and fractures is largely untested, although this may have great influence on the fault's geometry and evolution (e.g., Butler, 1989;Giambiagi et al, 2003;McGill and Stromquist, 1979;Schultz-Ela and Walsh, 2002;Virgo et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Dilatant normal faulting in jointed cohesive rocks: a physical model study

et al. 2016

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Abstract. Dilatant faults often form in rocks containing preexisting joints, but the effects of joints on fault segment linkage and fracture connectivity are not well understood. We present an analogue modeling study using cohesive powder with pre-formed joint sets in the upper layer, varying the angle between joints and a rigid basement fault. We analyze interpreted map-view photographs at maximum displacement for damage zone width, number of connected joints, number of secondary fractures, degree of segmentation and area fraction of massively dilatant fractures. Particle imaging velocimetry provides insight into the deformation history of the experiments and illustrates the localization pattern of fault segments. Results show that with increasing angle between joint-set and basement-fault strike the number of secondary fractures and the number of connected joints increase, while the area fraction of massively dilatant fractures shows only a minor increase. Models without pre-existing joints show far lower area fractions of massively dilatant fractures while forming distinctly more secondary fractures.

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“…For a parameter study on the effects of changing cohesion, fault angle and packing, we refer to [18,20,25]. Figure 2 shows a comparison between a numerical and an analogue model.…”

Section: Numerical Modelmentioning

confidence: 99%

“…The mechanical background of open fault formation can studied in analogue models using cohesive materials (see for example [5][6][13][14][15][16][17]) as well as with numerical methods, like the Discrete Elements Method [18][19][20]. Here we will attempt to integrate these results as well as present some new insight on the progradation direction of these faults.…”

Section: Introductionmentioning

confidence: 99%

The formation of open fractures in cohesive materials, results of scaled analogue and numerical modelling on fault zone porosity development

Gent

Abe

Urai

et al. 2010

EPJ Web of Conferences

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Abstract. We compare analogue and numerical models of dilatational fractures at low confining stress. These structures form an effective conduit for fluid flow in the field, but are difficult to model since they form in cohesive materials at low stresses. We use a truly cohesive powder for the analogue models and a Discrete Element Model (DEM) with brittle-elastic bonds for the numerical modelling. We show that despite variations in the model type, small differences in the location of initial fractures and the way these structures link-up to control the evolution of the model, the observed structures are robust. Three structural zones develop where different fault types dominate. In 3D numerical models we show an increase of the porosity on the fault zone with increasing deformation. The progradation direction is shown to be controlled by the position of the fracture. The combination of analogue models with cohesive powder and DEMs with internal cohesion is an excellent tool to study the evolution of open fractures.

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DEM simulation of normal faults in cohesive materials

Cited by 60 publications

References 22 publications

From mechanical modeling to seismic imaging of faults: A synthetic workflow to study the impact of faults on seismic

From mechanical modeling to seismic imaging of faults: A synthetic workflow to study the impact of faults on seismic

Dilatant normal faulting in jointed cohesive rocks: a physical model study

The formation of open fractures in cohesive materials, results of scaled analogue and numerical modelling on fault zone porosity development

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