Changes

==Predicting effect of provenance on diagenesis==

==Predicting effect of provenance on diagenesis==

 

[[file:predicting-reservoir-system-quality-and-performance_fig9-55.png|left|thumb|{{figure number|2}}. Copyright: Surdam et al., 1989; courtesy RMAG.]]

file:predicting-reservoir-system-quality-and-performance_fig9-55.png|{{figure number|2}}. Copyright: Surdam et al., 1989; courtesy RMAG.

file:predicting-reservoir-system-quality-and-performance_fig9-56.png|{{figure number|3}}. Copyright: Surdam et al., 1989; courtesy RMAG.

file:predicting-reservoir-system-quality-and-performance_fig9-57.png|{{figure number|4}}. Copyright: Surdam et al., 1989; courtesy RMAG.

Use the flow chart in [[:file:predicting-reservoir-system-quality-and-performance_fig9-55.png|Figure 2]] to predict the effect of original sediment composition on subsequent diagenesis.

Use the flow chart in [[:file:predicting-reservoir-system-quality-and-performance_fig9-55.png|Figure 2]] to predict the effect of original sediment composition on subsequent diagenesis.

==Estimating effect of near-surface diagenesis==

==Estimating effect of near-surface diagenesis==

Use the flow chart in [[:file:predicting-reservoir-system-quality-and-performance_fig9-56.png|Figure 3]] to estimate the effects of near-surface diagenesis (depth to point where temperature reaches [[temperature::80°C]]).

Use the flow chart in [[:file:predicting-reservoir-system-quality-and-performance_fig9-56.png|Figure 3]] to estimate the effects of near-surface diagenesis (depth to point where temperature reaches [[temperature::80°C]]).

==Predicting effect of mechanical diagenesis==

==Predicting effect of mechanical diagenesis==

Use the chart in [[:file:predicting-reservoir-system-quality-and-performance_fig9-57.png|Figure 4]] to predict the effects of mechanical diagenesis on sandstone porosity.

Use the chart in [[:file:predicting-reservoir-system-quality-and-performance_fig9-57.png|Figure 4]] to predict the effects of mechanical diagenesis on sandstone porosity.

==Using burial history to predict porosity==

==Using burial history to predict porosity==

[[Reconstructing burial history]] aids sandstone porosity prediction. Aburial history diagram integrates tectonic and hydrologic history with diagenetic evolution to predict sandstone porosity. The table below outlines steps for predicting porosity from burial history and is illustrated in Figure 9-58.

[[Reconstructing burial history]] aids sandstone porosity prediction. Aburial history diagram integrates tectonic and hydrologic history with diagenetic evolution to predict sandstone porosity. The table below outlines steps for predicting porosity from burial history and is illustrated in [[:file:predicting-reservoir-system-quality-and-performance_fig9-58.png|Figure 5]].

{| class = "wikitable"

{| class = "wikitable"

| Plot the porosity curve by combining concepts of diagenetic processes with burial and hydrologic histories of the prospect.

| Plot the porosity curve by combining concepts of diagenetic processes with burial and hydrologic histories of the prospect.

|}

|}

==Example of using burial history==

==Example of using burial history==

Below is an example of a diagram showing diagenetic and burial history for the Brent Group Sandstones, North Sea. Line thicknesses indicate relative abundance of diagenetic components.

[[:file:predicting-reservoir-system-quality-and-performance_fig9-59.png|Figure 6]] is an example of a diagram showing diagenetic and burial history for the Brent Group Sandstones, North Sea. Line thicknesses indicate relative abundance of diagenetic components.

 

The diagram below is an example of sandstone porosity prediction using burial history.

[[file:predicting-reservoir-system-quality-and-performance_fig9-59.png|thumb|{{figure number|9-59}}.]]

[[:file:predicting-reservoir-system-quality-and-performance_fig9-59.png|Figure 6]] is an example of sandstone porosity prediction using burial history.

===Analog porosity===

===Analog porosity===