Changes

==Rock types in carbonates==

==Rock types in carbonates==

It is an established procedure to characterize the rock properties of carbonates by rock types instead of lithofacies (Lucia, 1995, 1999). These are textural classes that are related to both depositional and diagenetic processes. Sandstone rock properties are dominated by intergranular pore systems, which exhibit a strong lithofacies control on grain size, shape, and sorting. By contrast, carbonate pore systems are much more complex (Choquette and Pray, 1970). The primary intergranular porosity is more variable because of the greater range in grain sizes and shapes. In addition, skeletal materials common in carbonates will show intraparticle porosity. The primary rock texture will often then be overprinted by postdepositional leaching, replacement, and cementation to form an even more complex pore network.<ref name=JW1982 />

It is an established procedure to characterize the rock properties of carbonates by rock types instead of lithofacies.<ref name=Lucia1995 /><ref name=Lucia1999 /> These are textural classes that are related to both depositional and diagenetic processes. Sandstone rock properties are dominated by intergranular pore systems, which exhibit a strong lithofacies control on grain size, shape, and sorting. By contrast, carbonate pore systems are much more complex (Choquette and Pray, 1970). The primary intergranular porosity is more variable because of the greater range in grain sizes and shapes. In addition, skeletal materials common in carbonates will show intraparticle porosity. The primary rock texture will often then be overprinted by postdepositional leaching, replacement, and cementation to form an even more complex pore network.<ref name=JW1982 />

==Typical settings for carbonate reservoirs==

==Typical settings for carbonate reservoirs==