DefinitionA <GEOLOGICAL RESERVOIR> is a <ROCK OBJECT> and a <RESERVOIR> that is a subsurface body of rock having sufficient porosity and permeability to store and transmit fluids
Sedimentary rocks are the most common reservoir rocks because they have more porosity than most igneous and metamorphic rocks and form under temperature conditions at which hydrocarbons can be preserved. A reservoir is a critical component of a complete petroleum system. Ref. Schlumberger Oilfield Glossary.
