Changes

All types of rock (igneous, sedimentary, metamorphic) can act as reservoir rocks if it can accommodate and drain hydrocarbons. Reservoir rocks around the world is dominated by sedimentary rocks because generally it has primary porosity. [[Igneous]] and metamorphic rocks can be reservoir if there are in fracturing state (secondary porosity).

All types of rock (igneous, sedimentary, metamorphic) can act as reservoir rocks if it can accommodate and drain hydrocarbons. Reservoir rocks around the world is dominated by sedimentary rocks because generally it has primary porosity. [[Igneous]] and metamorphic rocks can be reservoir if there are in fracturing state (secondary porosity).

[[File:Klasifikasi reservoir.jpg|650px|center|thumbnail|{{figure number|2|}}Scheme of classification of reservoir rocks. (Adapted from Nichols,2009, from lecture handout by Alamsyah <ref name=Alamsyah2015 >Alamsyah, M.N. 2015. Konsep Petroleum System (Handout Kuliah). Universitas Brawijaya</ref> )]]

[[File:Klasifikasi reservoir.jpg|650px|center|thumbnail|{{figure number|2|}}Scheme of classification of reservoir rocks. (Adapted from Nichols,2009, from lecture handout by Alamsyah <ref name=Alamsyah2015 >Alamsyah, M.N., 2015, Konsep Petroleum System (Handout Kuliah): Universitas Brawijaya</ref> )]]

===Siliciclastic Reservoir===

===Siliciclastic Reservoir===

Reef is a framework made of sea organism containing skeletal, grow in a shallow clean water where sunlight can reach as a nutrition.  Reef distribution is varies, some on the edge of the shelf and become a barrier, some scattered called patch reef. Patch reef can reach a few kilometer size while barrier can be elongated along the edge and limit the exposure with basin. Meanwhile the shape of a reef can be a pole(pinnacle) or lengthened (fringing). Both can become a good reservoir. Reef is a non-clastic carbonate rocks without transportation process on its formation.

Reef is a framework made of sea organism containing skeletal, grow in a shallow clean water where sunlight can reach as a nutrition.  Reef distribution is varies, some on the edge of the shelf and become a barrier, some scattered called patch reef. Patch reef can reach a few kilometer size while barrier can be elongated along the edge and limit the exposure with basin. Meanwhile the shape of a reef can be a pole(pinnacle) or lengthened (fringing). Both can become a good reservoir. Reef is a non-clastic carbonate rocks without transportation process on its formation.

[[File:Reef.png|400px|thumbnail|center|Figure 7. Reef habitat in the shallow sea. Adapted from Alamsyah <ref name=Alamsyah2015 />]]

[[File:Reef.png|400px|thumbnail|center|{{figure number|7|}}Reef habitat in the shallow sea. Adapted from Alamsyah <ref name=Alamsyah2015 />]]

====Clastic Limestone====

====Clastic Limestone====