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  | isbn    = 0-89181-602-X
 
  | isbn    = 0-89181-602-X
 
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The reason for including [[Fold trap regime|fold traps]] and [[Fault trap regime|fault traps]] in the structural system may be obvious, but the reason for including fracture traps may not. Some might argue that fractures are just another [[porosity]] type and should be thought of as part of the [[reservoir]], not as a trap regime. This classification scheme includes fracture traps in the structural system because fractures are a result of [[deformation]] and/or displacement and therefore are structural in nature.
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The reason for including [[Fold trap regime|fold traps]] and [[Fault trap regime|fault traps]] in the structural system may be obvious, but the reason for including fracture traps may not. Some might argue that [[fracture]]s are just another [[porosity]] type and should be thought of as part of the [[reservoir]], not as a trap regime. This classification scheme includes fracture traps in the structural system because fractures are a result of [[deformation]] and/or displacement and therefore are structural in nature.
    
==Definitions==
 
==Definitions==
 
The following definitions for fracture, fracture reservoir, and fracture trap are used in the classification scheme.
 
The following definitions for fracture, fracture reservoir, and fracture trap are used in the classification scheme.
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'''Fracture'''—Approximately planar surface along which originally contiguous rocks have broken and separated and along which the relative displacement of originally adjacent points across the fracture is small compared with fracture length.<ref name=ch02r10>Pollard, D. D., and P. Segall, 1987, Theoretical displacements add stresses near fractures with applications to fault, joints, veins, dikes, and solution surfaces, in Atkinson, B., K., ed., Fracture Mechanics of Rock: London, Academic Press, p. 277–349.</ref>
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'''Fracture'''—Approximately planar surface along which originally contiguous rocks have broken and separated and along which the relative displacement of originally adjacent points across the fracture is small compared with fracture length.<ref name=ch02r10>Pollard, D. D., and P. Segall, 1987, Theoretical displacements add stresses near fractures with applications to fault, joints, veins, dikes, and solution surfaces, in B. K. Atkinson, ed., Fracture Mechanics of Rock: London, Academic Press, p. 277–349.</ref>
    
'''Fracture Reservoir'''—Reservoir in which most of the [[permeability]] and some of the [[porosity]] is provided by open fractures.
 
'''Fracture Reservoir'''—Reservoir in which most of the [[permeability]] and some of the [[porosity]] is provided by open fractures.
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[[Category:Traps, trap types, and the petroleum system]]  
 
[[Category:Traps, trap types, and the petroleum system]]  
 
[[Category:Classification of exploration traps]]
 
[[Category:Classification of exploration traps]]
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[[Category:Treatise Handbook 3]]

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