Difference between revisions of "Types of diagenetic traps"
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| part = Predicting the occurrence of oil and gas traps | | part = Predicting the occurrence of oil and gas traps | ||
| chapter = Exploring for stratigraphic traps | | chapter = Exploring for stratigraphic traps | ||
| − | | frompg = 21- | + | | frompg = 21-61 |
| − | | topg = 21- | + | | topg = 21-61 |
| author = John C. Dolson, Mike S. Bahorich, Rick C. Tobin, Edward A. Beaumont, Louis J. Terlikoski, Michael L. Hendricks | | author = John C. Dolson, Mike S. Bahorich, Rick C. Tobin, Edward A. Beaumont, Louis J. Terlikoski, Michael L. Hendricks | ||
| link = http://archives.datapages.com/data/specpubs/beaumont/ch21/ch21.htm | | link = http://archives.datapages.com/data/specpubs/beaumont/ch21/ch21.htm | ||
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==Categories== | ==Categories== | ||
| − | [[file:exploring-for-stratigraphic-traps_fig21-40.png|thumb|{{figure number|1}} | + | [[file:exploring-for-stratigraphic-traps_fig21-40.png|300px|thumb|{{figure number|1}}Cross sections of diagenetic trap types.]] |
[[Diagenesis|Diagenetic]] traps occur in two basic categories: early or near-surface traps and late-burial traps. | [[Diagenesis|Diagenetic]] traps occur in two basic categories: early or near-surface traps and late-burial traps. | ||
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Early or near-surface diagenetic traps are created by the following: | Early or near-surface diagenetic traps are created by the following: | ||
| − | * Reservoir destroyed by | + | * Reservoir destroyed by [[paleosol]]s, [[Meteoric diagenesis|meteoric cementation]], [[karst]]ing, cave development, and/or sediment infill |
* Reservoir enhanced by paleo-groundwater movement and/or karsting | * Reservoir enhanced by paleo-groundwater movement and/or karsting | ||
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* Bottom seal generated below oil-water contacts by [[Postaccumulation cementation|late cementation]] | * Bottom seal generated below oil-water contacts by [[Postaccumulation cementation|late cementation]] | ||
| − | * Primary [[porosity]] preserved due to selective cementation and/or early hydrocarbon emplacement | + | * Primary [[porosity]] preserved due to selective [[Reservoir quality#Cementation|cementation]] and/or early hydrocarbon emplacement |
| − | * Secondary porosity created by cement and/or matrix dissolution | + | * [[Secondary porosity]] created by cement and/or matrix dissolution |
| − | [[:file:exploring-for-stratigraphic-traps_fig21-40.png|Figure 1]] shows cross | + | [[:file:exploring-for-stratigraphic-traps_fig21-40.png|Figure 1]] shows [[cross section]]s of diagenetic trap types. |
==See also== | ==See also== | ||
| − | * [[Diagenetic | + | |
| − | + | * [[Diagenetic traps: criteria for recognition]] | |
| − | * [[ | + | * [[Diagenesis: information from petrology]] |
| − | * [[Diagenetic trap regime] | + | * [[Diagenetic trap regime]] |
==External links== | ==External links== | ||
| Line 48: | Line 48: | ||
[[Category:Predicting the occurrence of oil and gas traps]] | [[Category:Predicting the occurrence of oil and gas traps]] | ||
[[Category:Exploring for stratigraphic traps]] | [[Category:Exploring for stratigraphic traps]] | ||
| + | [[Category:Treatise Handbook 3]] | ||
Latest revision as of 21:01, 4 February 2022
Diagenetic traps are created by pore throat modifications of primary facies. They can also be created by changes in fluid type within the pore system.
Categories
Diagenetic traps occur in two basic categories: early or near-surface traps and late-burial traps.
Early or near-surface diagenetic traps are created by the following:
- Reservoir destroyed by paleosols, meteoric cementation, karsting, cave development, and/or sediment infill
- Reservoir enhanced by paleo-groundwater movement and/or karsting
Late burial diagenetic traps are created by the following:
- Bottom seal generated below oil-water contacts by late cementation
- Primary porosity preserved due to selective cementation and/or early hydrocarbon emplacement
- Secondary porosity created by cement and/or matrix dissolution
Figure 1 shows cross sections of diagenetic trap types.
See also
External links
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