4,231
edits
Changes
Jump to navigation
Jump to search
Line 39:
Line 39: − + − +
→Diagenesis
==Diagenesis==
==Diagenesis==
The reservoir quality of sediments is modified by diagenetic processes. Some diagenetic processes are directly related to the physical nature of the sediment, and the resulting geometries can be directly related to sedimentation patterns. Other diagenetic processes involve the interaction of sediment with flowing interstitial water. Understanding hydrodynamics is very important in predicting the geometry of the diagenetic effects.
The reservoir quality of sediments is modified by diagenetic processes. Some diagenetic processes are directly related to the physical nature of the sediment, and the resulting geometries can be directly related to sedimentation patterns. Other diagenetic processes involve the interaction of sediment with flowing interstitial water. Understanding [[hydrodynamics]] is very important in predicting the geometry of the diagenetic effects.
===Calcium carbonate cementation and compaction===
===Calcium carbonate cementation and compaction===
Calcium carbonate cementation and compaction are diagenetic processes that are initiated soon after deposition and by which intergranular pore space is progressively reduced producing systematic changes in petrophysical properties (see "[[Evaluating diagenetically complex reservoirs]]" and "[[Reservoir quality]]"). Compaction is a physical/chemical process, while cementation requires fluid flow. Microporosity within grains or between lime mud particles may be retained even though intergranular pore space is lost.
Calcium carbonate cementation and compaction are diagenetic processes that are initiated soon after deposition and by which intergranular pore space is progressively reduced producing systematic changes in petrophysical properties (see [[Evaluating diagenetically complex reservoirs]] and [[Reservoir quality]]). Compaction is a physical/chemical process, while cementation requires fluid flow. Microporosity within grains or between lime mud particles may be retained even though intergranular pore space is lost.
===Dolomitization===
===Dolomitization===