DOI: 10.1306/08050908169
Scopus记录号: 2-s2.0-77649222788
论文题名: Geomechanical modeling of an extensional fault-propagation fold: Big Brushy Canyon monocline, Sierra Del Carmen, Texas
作者: Smart K.J. ; Ferrill D.A. ; Morris A.P. ; Bichon B.J. ; Riha D.S. ; Huyse L.
刊名: AAPG Bulletin
ISSN: 0149-1950
EISSN: 1558-9680
出版年: 2010
发表日期: 2010
卷: 94, 期: 2 起始页码: 231
结束页码: 240
语种: 英语
Scopus关键词: Deformation distributions
; Deformation history
; Extensional faults
; Extensional strain
; Fault displacement
; Field data
; Field observations
; Field structural data
; Finite element models
; Frictional sliding
; Geologic structures
; Geomechanical modeling
; Hydrocarbon reservoir
; Iterative model
; Material property
; Mechanical analysis
; Mechanical stratigraphy
; Mesostructures
; Model configuration
; Model domains
; Model results
; Modeling approach
; Non-linear finite element modeling
; Normal faults
; Site-specific
; Slip surfaces
; Strain evolution
; Structural evolution
; Structural setting
; Subsurface deformation
; Boundary conditions
; Computational geometry
; Deformation
; Hydrocarbons
; Limestone
; Shear strain
; Stratigraphy
; Structural geology
; Finite element method
; Cretaceous
; extensional tectonics
; fault displacement
; fault propagation
; geomechanics
; limestone
; model test
; monocline
; strain measurement
; Del Rio
; Ecuador
; Santa Elena
; Sierra del Carmen
; Texas
; United States
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Field structural data from the Big Brushy Canyon monocline developed in Cretaceous strata of west Texas are combined with nonlinear finite element modeling to help bridge the gap between geometric, kinematic, and mechanical analysis techniques for understanding the deformation history of reservoirscale geologic structures. The massive Santa Elena Limestone is offset along a steep normal fault, and fault displacement is accommodated upward by the folding of the Buda Limestone and Boquillas Formation and the thinning in the intervening Del Rio Clay. Mesostructures within competent Buda Limestone beds are concentrated in the monocline limb instead of the hinge and include bed-perpendicular veins that accommodate bed-parallel extension and bedding-plane slip surfaces that offset the veins and accommodate flexural slip. Finite element models were constructed to reproduce the monocline geometry and deformation distribution as well as to assess the effect of material properties and boundary conditions on structural evolution. The initial model configuration replicated the assumed predeformational geometry, included frictional sliding surfaces to allow for bedding-parallel slip, and used a displacement boundary condition at the base of the Santa Elena footwall to simulate fault motion. Geometry and strain evolution were tracked so that (1) fold shape, (2) cumulative extension, and (3) layer-parallel shear strain could be compared to field observations. Iterative model runs successfully matched field data and revealed the importance of benchmarking the model results against monocline geometry, layer-parallel extensional strain, and bedding slip in the natural example. Our results illustrate the potential use of this modeling approach whereby calibration is performed using available data and is followed by strain measurement throughout the model domain to aid in prediction of subseismic faults and fractures. This geomechanical modeling approach provides a powerful tool for sitespecific subsurface deformation prediction in hydrocarbon reservoirs that incorporates details of the local mechanical stratigraphy and structural setting. Copyright ©2010. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-77649222788&doi=10.1306%2f08050908169&partnerID=40&md5=0eb7798e90051af06a28d398bbf48e04
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13519
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:
Smart K.J.,Ferrill D.A.,Morris A.P.,et al. Geomechanical modeling of an extensional fault-propagation fold: Big Brushy Canyon monocline, Sierra Del Carmen, Texas[J]. AAPG Bulletin,2010-01-01,94(2)