Vis enkel innførsel

dc.contributor.authorHolt, Rune Martin
dc.contributor.authorBakk, Audun
dc.contributor.authorStenebråten, Jørn
dc.contributor.authorBauer, Andreas
dc.contributor.authorFjær, Erling
dc.date.accessioned2019-01-28T11:50:47Z
dc.date.available2019-01-28T11:50:47Z
dc.date.created2018-09-17T09:32:09Z
dc.date.issued2018
dc.identifier.isbn978-0-9794975-3-7
dc.identifier.urihttp://hdl.handle.net/11250/2582612
dc.description.abstractFluid production from or injection into a subsurface reservoir leads to stress pressure changes inside and outside the reservoir. The overburden often consists of low permeability shale, and the undrained pore pressure response may be estimated from Skempton’s empirical equations. The key parameters are Skempton’s A and B, controlling the impact of shear stress and mean stress, respectively. In this paper we show how these parameters can be deduced from anisotropic poroelasticity theory and how they are influenced by plasticity. Laboratory data verify Skempton’s relationship for shales for various stress paths, and show the predicted dependence of A on the orientation of the stress field with respect to the symmetry axis of the sample. Data also show decrease of A as failure is approached, and links this to measured volumetric strain. Assisted by results of geomechanical modeling, the Skempton parameters are used to estimate in situ pore pressure changes. Pore pressure increase is likely during injection, but may also occur for certain stress paths during depletion. The results may have impact on infill drilling and on induced seismicity.nb_NO
dc.language.isoengnb_NO
dc.publisherAmerican Rock Mechanics Association (ARMA)nb_NO
dc.relation.ispartof52nd US Rock Mechanics / Geomechanics Symposium, 17-20 June 2018, Seattle, Washington
dc.relation.urihttps://www.onepetro.org/conference-paper/ARMA-2018-949
dc.titleSkempton's A – A key to man-induced subsurface pore pressure changesnb_NO
dc.title.alternativeSkempton's A – A key to man-induced subsurface pore pressure changesnb_NO
dc.typeChapternb_NO
dc.description.versionpublishedVersionnb_NO
dc.identifier.cristin1609983
dc.relation.projectNorges forskningsråd: 234074nb_NO
dc.description.localcodeThis chapter will not be available due to copyright restrictions (c) 2018 by American Rock Mechanics Association (ARMA)nb_NO
cristin.unitcode194,64,90,0
cristin.unitcode194,0,0,0
cristin.unitnameInstitutt for geovitenskap og petroleum
cristin.unitnameNorges teknisk-naturvitenskapelige universitet
cristin.ispublishedtrue
cristin.fulltextpreprint
cristin.qualitycode1


Tilhørende fil(er)

Thumbnail

Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel