Changes

* [[Porosity]] in the sequence tops plugged by [http://www.merriam-webster.com/dictionary/caliche caliche] and vadose fibrous cements

* [[Porosity]] in the sequence tops plugged by [http://www.merriam-webster.com/dictionary/caliche caliche] and vadose fibrous cements

* [[Porosity]] in subtidal grainy parts of sequences generally lacks early sparry cements; primary porosity preserved where marine fringing cement present

* [[Porosity]] in subtidal grainy parts of sequences generally lacks early sparry cements; primary porosity preserved where marine fringing cement present

* Top and lateral seals may form where peritidal dolomite and evaporite [[Well_log_sequence_analysis#Parasequence_stacking_patterns|prograde]] over [[third-order sequences]]

* Top and lateral seals may form where peritidal [[dolomite]] and [[evaporite]] [[Well_log_sequence_analysis#Parasequence_stacking_patterns|prograde]] over [[third-order sequences]]

An example is the Upper Mississippian ramp reservoirs of the eastern and central United States.

An example is the Upper Mississippian ramp reservoirs of the eastern and central United States.

* Vadose and upper phreatic sparry calcite cement often plugs primary and secondary porosity in the upper parts of sequences

* Vadose and upper phreatic sparry calcite cement often plugs primary and secondary porosity in the upper parts of sequences

* Primary porosity may be greatest in the middle or lower parts of sequences

* Primary porosity may be greatest in the middle or lower parts of sequences

* Meteoric diagenesis extends down into underlying older sequences because of deep groundwater zones; internal barriers may mitigate the effect

* Meteoric [[diagenesis]] extends down into underlying older sequences because of deep groundwater zones; internal barriers may mitigate the effect

Examples are the British Dinantian (Mississippian) platforms.

Examples are the British Dinantian (Mississippian) platforms.

[[Category:Predicting the occurrence of oil and gas traps]]  

[[Category:Predicting the occurrence of oil and gas traps]]  

[[Category:Predicting reservoir system quality and performance]]

[[Category:Predicting reservoir system quality and performance]]