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==Type of Reservoir Rocks==
==Type of Reservoir Rocks==
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 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 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> )]]