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Keywords: pore pressure
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Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-058
... in mined hard-rock caverns requires the presence of a water curtain system approximately 20 m above the storage galleries such as to obtain a permanent convergent flow of water in the caverns. A good understanding of the effects of the distribution of the water pore pressure in the different joint sets...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-031
... permeability fluid dynamics fracture aperture eurock 2020 ballooning pore pressure severe breathing effect society of petroleum engineers Mud loss/mud gain, known as the breathing (ballooning) effect, presents a major problem in drilling because of the difficulty in distinguishing lost circulation...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-148
... gas monetization Efficiency water curtain tunnel cavern excavation hydraulic fracturing Downstream Oil & Gas pore pressure cavern water curtain construction borehole water curtain borehole compression operation water curtain bore-hole storage cavern water curtain system Rock...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-213
... ABSTRACT: The effective pressure law for the permeability of sandstone is experimentally studied by conducting Darcy's law permeability test under various confining pressure (from 14 to 58 MPa) and pore pressure (from 8 to 23 MPa). Supercritical CO 2 as a pore fluid has been adopted instead...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-072
...Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-03265-1 Tunnel excavation in low permeability ground: Effect of anisotropy on excess pore pressure L.M. Guayacán-Carrillo & D. Seyedi Andra R&D, Chatenay...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-163
... (1), (2) ( )kxkgwwP jx w r w ijk w iq = (1) = kxkgggP jx g r g ww ijk g iq (2) where kij is saturated mobility coefficient, r is relative permeability for the fluid, is dynamic viscosity, P is pore pressure, is fluid density and g is gravity. w and g of the subscript...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-144
... obtained results such as deformations, strains, stresses, pore pressure, utilisation, forces in the deformation elements and lining sectional forces etc. are time dependent. In order to achieve an acceptable system behaviour, the support measures had to be adjusted to the considered rock conditions...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-110
... properties of COX is considered by applying anisotropic THM parameters. A pore pressure dependent permeability model has been developed to explain the experimental observations. The dependency of thermal conductivity on saturation degree and the temperature effect on water retention behaviour have been...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-097
... concerning the repository layout and long-term behaviour are highlighted. 1 Introduction One of the most important aspects in each geomechanical analysis is the appropriate understanding of the stress field, i.e. the in situ stresses including the pore pressure with their spatial and temporal variation...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-020
... the contribution of pore pressure to the effective stress. For the granular soil, the contact area among grains is very small, thus it is possible to assume that a cross section which is considered is almost occupied by the fluid. Hence, the corresponding effective stress coef- ficient approximately equals to 1...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-122
... and communicated in a number of ways, as depicted in Figure 3. 2.2 Analysis methodology An initial analysis that included OBG, pore pressure, and calibration to all of the available data was per- formed on each well. In addition, an initial WBS analysis was performed on one select well. At this point, a peer...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-234
... variations. Due to the increasing pore pressure fluid, the size and aperture distribution of the fractures are modified resulting in the formation of preferential flow channels within the geological formation. The numerical approach proposed in this paper is a fully coupled hydro-mechanical model...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-214
... determinations. Transient-state techniques provide with a work- able alternative allowing faster determinations. Here we evaluate three transient state methods: the pulse decay (PDM), the pore-pressure transmission (PPTM) and the pore-pressure oscillation (PPOM) methods which are compared with the conventional...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-235
... common and the main cause for most of problems during drilling operations. In this study, the existing relevant logs, drilling and other data from offset well were analyzed and integrated to construct a precise Mechanical Earth Model (MEM) describing pore pressure, stress magnitudes and orientation...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-216
... & M. Ziegler Geotechnical Engineering, RWTH Aachen University, Aachen, Germany T. Kempka GFZ German Research Centre for Geosciences, Hydrogeology, Potsdam, Germany ABSTRACT: The injection of CO2 into a reservoir can influence the initial stress state significantly due to changes in pore pressures...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-007
... an increase in the pore pressure and a decrease in the effective stress of the rock-mass that results in stress-strain changes in and around the injection zones. These alterations may lead to changes in the poros- ity and permeability of the strata, thus affecting the migration and injectivity of the CO2...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-098
... continuous inclinometers – 60 sensors to the depths of 14 to 16 m. One station included 3 uniaxial in-place sensors, automatic piezometer and groundwater pore pressure transducer. Weather monitoring station performed measurements of precipitation, air pressure, air humidity and air temperature. Data were...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-048
... Upstream Oil & Gas porous medium experimental determination reservoir geomechanics gustkiewicz Pore Fluid coefficient flow in porous media pore pressure specimen effective stress moduli Reservoir Characterization Fluid Dynamics porosity Byerlee Biot coefficient sandstone...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-049
... sandstone enhanced recovery steam-assisted gravity drainage pore pressure internal friction angle high temperature permeability Rock Mechanics for Resources, Energy and Environment Kwas´niewski & ydz ba (eds) © 2013 Taylor & Francis Group, London, ISBN 978-1-138-00080-3 Dynamic and static rock...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-122
... selecting fracture mechani-cal properties for analyzing HM processes in detail, several aspects should be consid-ered. In situ stresses (natural and induced), as well as hydraulic head (pore pressure), should be described. complex reservoir displacement hydraulic fracturing modeling conductive...

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