Changes

===Dissolution and associated processes===

===Dissolution and associated processes===

''Dissolution'' is the diagenetic process by which carbonate and evaporite minerals are dissolved and removed, thus creating and modifying pore space in reservoir rocks (see “[[Reservoir quality]]”). The effect of this process on permeability depends upon the geometry and location of the resulting voids relative to the rock fabric. In some cases, dissolution is fabric selective and results in formation of isolated vugs. In other cases, dissolution enlarges fractures and interparticle pores resulting in large, connected vugs. If the vugs are large enough, the roof may collapse, forming a floor breccia and fractured roof.

''Dissolution'' is the diagenetic process by which [[Carbonates|carbonate]] and [[Evaporites|evaporite]] minerals are dissolved and removed, thus creating and modifying pore space in reservoir rocks (see “[[Reservoir quality]]”). The effect of this process on [[permeability]] depends upon the geometry and location of the resulting voids relative to the rock fabric. In some cases, dissolution is fabric selective and results in formation of isolated vugs. In other cases, dissolution enlarges [[fractures]] and interparticle pores resulting in large, connected [[vugs]]. If the vugs are large enough, the roof may collapse, forming a floor [[breccia]] and fractured roof.

==Carbonate rock fabric and petrophysical relationships==

==Carbonate rock fabric and petrophysical relationships==