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Keywords: hydraulic fracture
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Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-030
... Abstract Multistage mini hydraulic fracturing tests were performed in a borehole located in central Hungary in order to determine in-situ stress. At depth of about 500 to 560 meters, observed pressure versus time curve in metamorphic rock (mica schist) show a typical results. After each...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-130
... Abstract In this study, we used the Particle Flow Code 2D (PFC2D) to simulate interaction of hydraulic fractures and natural fractures in low permeable hard rock. Natural fractures are simulated using the smooth joint model of PFC2D. We modified our fluid flow algorithm to model larger...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-042
... ABSTRACT: In order to stimulate the fluid flow in rock, hydraulic fracturing is being widely used in many different engineering projects including enhanced geothermal system, enhanced oil recovery, and shale gas production. In many cases, hydraulic fracturing is performed in deep sedimentary...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-191
... be formed to achieve better results effect. Based on the plane strain theory of semi-infinite fracture, the characteristics of hydraulic fracture-induced stress are analyzed; according to effect that the superposition of induced stress can effectively reduce the horizontal stress difference (σ H -σ h...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-129
... Abstract Hydraulic fracturing operations are necessary to extract hydrocarbons and geothermal energy from tight reservoirs or hot dry rock. Particularly challenging is the design of hydraulic fracturing in anisotropic rock. A Devonian Slate was characterized for its rock mechanical properties...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-113
... Abstract An analysis of the effect of parameter unpredictability on the propagation of hydraulic fractures is presented. Hydraulic fracturing (HF) is becoming an established technique in mining for rock mass preconditioning. Initial applications were to improve the caving ability of ore...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-224
... Abstract In this paper, outcrops of Longmaxi formation of shale in Sichuan, China, the most potential shale formation expected, were collected and prepared for laboratory experiments. Anisotropic mechanical properties were tested, followed by laboratory investigations of hydraulic fracture...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-062
... the initial state of rock stress of the shallow gneiss regime in Seoul, a total of sixty hydraulic fracturing tests was performed in the southern area of Han river in Seoul, involving 12 test boreholes. The results from hydraulic fracturing measurement show an obvious difference in the magnitudes...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-107
... Abstract Application of hydraulic fracturing for preconditioning of hard rock in underground caving mines has been demonstrated to be an effective means to induce and promote cave growth. Using Itasca's particle flow code PFC 2D , a real scale numerical test environment has been developed...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-147
...Rock Mechanics for Resources, Energy and Environment Kwas´niewski & ydz ba (eds) © 2013 Taylor & Francis Group, London, ISBN 978-1-138-00080-3 Evaluation of stress changes due to multi-stage hydraulic fracturing Consideration of field results N.B. Nagel, F. Zhang, M.A. Sanchez-Nagel & B. Lee...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-106
... Abstract: Laboratory hydraulic fracture (HF) tests on Ruhr sandstone have been conducted with cubes of intact as well as pre-fractured rock. The cubes had an edge length of 15 cm and the applied external stresses were in the order of 5 MPa. The hydraulic fracture was achieved by pumping oil...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-100
... horizontal stress profile rock mechanics institute nonoccurrence permissible horizontal stress hydraulic fracture stress Profile breakout Eurock '96, Barla (ed.) © 1996 Balkema, Rotterdam. ISBN 90 5410 843 6 Collaborative development of a wellbore stability analysis software with determination...

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