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| | ''Nonmineralized fracture'' | | | ''Nonmineralized fracture'' |
| |} | | |} |
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− | '''Regime:''' Fracture trap<br>
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− | Lateral boundaries of the trap are provided by change from fractured reservoir to unfractured or less fractured rock or by change from open, permeable fractures to cement-filled or narrow-aperture, low-[[permeability]] fractures.
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− | :'''Class:''' Extension fracture trap
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− | :Dominant reservoir fractures are extension fractures.
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− | ::'''Subclass:''' Parallel fractures
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− | ::Open fractures in a fractured reservoir, predominantly unidirectional in both strike and dip.
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− | :::'''Style:''' Mineralized fracture
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− | :::Partially or totally mineralized by postfracture cements, typically calcite, gypsum, or silica.
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− | :::'''Style:''' Nonmineralized fracture
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− | :::Contains no postfracture cements or minerals.
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− | ::'''Subclass:''' Intersecting fractures
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− | ::Open fractures in fractured reservoir of several intersecting sets, either along fracture strike or fracture dip.
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− | :::'''Style:''' Mineralized fracture
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− | :::'''Style:''' Nonmineralized fracture
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− | :'''Class:''' Shear fracture trap
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− | :The dominant reservoir fractures are shear fractures.
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− | ::'''Subclass:''' Parallel fractures
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− | :::'''Style:''' Mineralized fracture
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− | :::'''Style:''' Nonmineralized fracture
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− | ::'''Subclass:''' Intersecting fractures
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− | :::'''Style:''' Mineralized fracture
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− | :::'''Style:''' Nonmineralized fracture</list-item></list-item>
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− | :'''Class:''' Complex fracture trap
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− | :Dominant reservoir fractures are complex fractures.
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− | ::'''Subclass:''' Parallel fractures
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− | :::'''Style:''' Mineralized fracture
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− | :::'''Style:''' Nonmineralized fracture
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− | ::'''Subclass:''' Intersecting fractures
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− | :::'''Style:''' Mineralized fracture
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− | :::'''Style:''' Nonmineralized fracture
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| Based on the interpretation of the genetic causes of fracture traps, two fracture trap families are recognized: tectonic and nontectonic. | | Based on the interpretation of the genetic causes of fracture traps, two fracture trap families are recognized: tectonic and nontectonic. |