DOI: 10.130e/041111.10144
Scopus记录号: 2-s2.0-84857348777
论文题名: Geomechanical modeling of stresses adjacent to salt bodies: Part 1 - Uncoupled models
作者: Luo G. ; Nikolinakou M.A. ; Flemings P.B. ; Hudec M.R.
刊名: AAPG Bulletin
ISSN: 0149-1798
EISSN: 1558-9528
出版年: 2012
发表日期: 2012
卷: 96, 期: 1 起始页码: 43
结束页码: 64
语种: 英语
Scopus关键词: Constitutive law
; Deviatoric stress
; Effective stress
; Elastic medium
; Elasto-plastic
; Elasto-plastic models
; Extensional strain
; Fluid pressures
; Geomechanical modeling
; Geoscientists
; Internal friction angle
; Plastic yielding
; Stress perturbations
; Stress prediction
; Uncoupled models
; Upper limits
; Viscoelastic stress
; Anoxic sediments
; Elastoplasticity
; Pore pressure
; Sedimentology
; Spheres
; effective stress
; elastoplasticity
; fluid pressure
; friction
; geomechanics
; numerical model
; pore pressure
; salt dome
; stress analysis
; viscoelasticity
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: We compare four approaches to geomechanical modeling of stresses adjacent to salt bodies. These approaches are distinguished by their use of elastic or elastoplastic constitutive laws for sediments surrounding the salt, as well as their treatment of fluid pressures in modeling. We simulate total stress in an elastic medium and then subtract an assumed pore pressure after calculations are complete; simulate effective stress in an elastic medium and use assumed pore pressure during calculations; simulate total stress in an elastoplastic medium, either ignoring pore pressure or approximating its effects by decreasing the internal friction angle; and simulate effective stress in an elastoplastic medium and use assumed pore pressure during calculations. To evaluate these approaches, we compare stresses generated by viscoelastic stress relaxation of a salt sphere. In all cases, relaxation causes the salt sphere to shorten vertically and expand laterally, producing extensional strains above and below the sphere and shortening against the sphere flanks. Deviatoric stresses are highest when sediments are assumed to be elastic, whereas plastic yielding in elastoplastic models places an upper limit on deviatoric stresses that the rocks can support, so stress perturbations are smaller. These comparisons provide insights into stresses around salt bodies and give geoscientists a basis for evaluating and comparing stress predictions. Copyright ©; 2012. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84857348777&doi=10.130e%2f041111.10144&partnerID=40&md5=d1b1e465dffbeb453003eac8aefa9337
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13368
Appears in Collections: 过去全球变化的重建 影响、适应和脆弱性 科学计划与规划 气候变化与战略 全球变化的国际研究计划 气候减缓与适应 气候变化事实与影响
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Recommended Citation:
Luo G.,Nikolinakou M.A.,Flemings P.B.,et al. Geomechanical modeling of stresses adjacent to salt bodies: Part 1 - Uncoupled models[J]. AAPG Bulletin,2012-01-01,96(1)