Constitutive modeling of a laumontite-rich tight rock and the application to poromechanical analysis of deeply drilled wells

作     者：Sina Heidari Biao Li Antoine B.Jacquey Bin Xu 

作者机构：Department of BuildingCivil&Environmental EngineeringConcordia UniversityMontrealQuebecH3G 1M8Canada Department of CivilGeological and Mining EngineeringPolytechnique MontrealMontrealQuebecH3T 1J4Canada Department of Civil EngineeringSchulich School of Engineering University of CalgaryCalgaryAlbertaT2N 4V8Canada Origin Geomechanics IncCalgaryT3H 0X6Canada 

出 版 物：《Rock Mechanics Bulletin》 (岩石力学通报（英文）)

年 卷 期：2023年第2卷第2期

页      面：41-52页

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：support by Concordia University Seed start-up grant(NO.VS1233)is acknowledged.Origin Geomechanics Inc.is acknowledged for providing petrophysical data of the studying rock formation.We also appreciate the helpful comments from two anonymous reviewers 

主　　题：Laumontite-rich rock Finite element modeling Shear zone Thermomechanics-based constitutive model Hydro-mechanical coupling 

摘      要：Geological formations containing laumontite-rich rock are usually treated as problematic for geo-energy production projects because the presence of laumontite mineral can promote complex mechanical *** laboratory results indicate that rock formations with a higher laumontite content display severe stress sensitivity in poromechanical *** an increase in confining pressure,there is a transition from dilation to compression regime and the resulting localization styles range from shear dilation to compaction *** this study,we conduct finite element modeling of constitutive behaviors of rocks retrieved from the tight glutenite reservoir formation using a thermodynamic-consistent plasticity *** shear dilation to compaction transition is well *** analysis is also conducted to analyze the plastic zone development around a borehole drilled in an over pressured *** simulated stress-paths of key points around the borehole are used to demonstrate the plastic strain development *** impact of in-situ stress on the wellbore stability is highlighted,and a comparison with the results from using the traditional plastic constitutive model is conducted.