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). |