Changes

===Cement===

===Cement===

The composition and abundance of [[Reservoir_quality#Cementation|cements]] reflects the geochemical history of a reservoir sandstone and may influence evaluation of reservoir stimulation procedures and potential for formation damage. Numerous minerals that commonly occur as cements in sandstones are known to dissolve and thereby contribute to porosity enhancement. However, recognition of cement dissolution porosity is often difficult because cement dissolution pores mimic primary pores, especially if the dissolved cement was restricted to intergranular space.

The composition and abundance of [[Reservoir_quality#Cementation|cements]] reflects the geochemical history of a reservoir sandstone and may influence evaluation of reservoir [[stimulation]] procedures and potential for [[Rock-water reaction: formation damage|formation damage]]. Numerous minerals that commonly occur as cements in sandstones are known to dissolve and thereby contribute to porosity enhancement. However, recognition of cement [[Reservoir_quality#Dissolution|dissolution]] porosity is often difficult because cement dissolution pores mimic primary pores, especially if the dissolved cement was restricted to intergranular space.

===Matrix===

===Matrix===