Changes

'''System:''' [[Stratigraphic trap]]s

'''System:''' [[Stratigraphic trap]]s

 

:'''Regime:''' Diagenetic traps

* '''Regime:''' Diagenetic traps

::'''Class:''' Diagenetic reservoirs

 

::Form where [[porosity]] is created as a result of local diagenetic processes such as dissolution or dolomitization.

<list-item>'''Class:''' Diagenetic reservoirs</list-item><list-item>Form where [[porosity]] is created as a result of local diagenetic processes such as dissolution or dolomitization.

:::'''Subclass:''' Secondary dolomite reservoirs

 

:::Form as a result of localized secondary dolomitization.

<list-item>'''Subclass:''' Secondary dolomite reservoirs</list-item><list-item>Form as a result of localized secondary dolomitization.</list-item><list-item>'''Subclass:''' Leached (secondary) porosity</list-item><list-item>Form as a result of localized leaching of nonreservoir-quality rock to create enhanced porosity and [[permeability]]. Common beneath unconformity surfaces.</list-item></list-item><list-item>'''Class:''' Diagenetic seals</list-item><list-item>Trap boundaries created by plugging original reservoir porosity and permeability by diagenetic cements or minerals.

:::'''Subclass:''' Leached (secondary) porosity

 

:::Form as a result of localized leaching of nonreservoir-quality rock to create enhanced porosity and [[permeability]]. Common beneath unconformity surfaces.

<list-item>'''Subclass:''' Secondary anhydrite barriers</list-item><list-item>Form as a result of secondary anhydrite precipitating in original pore spaces.</list-item><list-item>'''Subclass:''' Secondary clay barriers</list-item><list-item>Form as a result of secondary clay, commonly kaolinite, precipitating in original pore space.

::'''Class:''' Diagenetic seals

 

::Trap boundaries created by plugging original reservoir porosity and permeability by diagenetic cements or minerals.

<list-item>'''Style:''' Secondary pore-throat trap</list-item><list-item>Caused by a reduction in the size of pore-throat radii of reservoir rocks by depositional or diagenetic processes. These trap types typically have relatively porous units in the sealing facies that are impermeable to oil [[migration]] due to capillary restraints but contain producible water.</list-item></list-item></list-item>

:::'''Subclass:''' Secondary anhydrite barriers

:::Form as a result of secondary anhydrite precipitating in original pore spaces.

:::'''Subclass:''' Secondary clay barriers

:::Form as a result of secondary clay, commonly kaolinite, precipitating in original pore space.

::::'''Style:''' Secondary pore-throat trap

::::Caused by a reduction in the size of pore-throat radii of reservoir rocks by depositional or diagenetic processes. These trap types typically have relatively porous units in the sealing facies that are impermeable to oil [[migration]] due to capillary restraints but contain producible water.

==Discussion of diagenetic trap families==

==Discussion of diagenetic trap families==