Changes

[[file:predicting-reservoir-system-quality-and-performance_fig9-1.png|300px|thumb|{{figure number|1}}Major components of a conventional reservoir system.]]

[[file:predicting-reservoir-system-quality-and-performance_fig9-1.png|300px|thumb|{{figure number|1}}Major components of a conventional reservoir system.]]

In this discussion, a reservoir system is a water–hydrocarbon system contained within the pores of a rock unit. A reservoir system has three main components: a reservoir, an aquifer, and a transition zone (interface) between the two.

In this discussion, a reservoir system is a water–[[hydrocarbon]] system contained within the pores of a rock unit. A reservoir system has three main components: a [[reservoir]], an aquifer, and a transition zone (interface) between the two.

* A '''reservoir''' is a porous and permeable rock saturated with oil or gas in [[buoyancy pressure]] equilibrium with a free water level (zero buoyancy pressure). It has one or more containers and is located below a seal.

* A '''reservoir''' is a [[Porosity|porous]] and [[Permeability|permeable]] rock saturated with oil or gas in [[buoyancy pressure]] equilibrium with a [[free water level]] (zero buoyancy pressure). It has one or more containers and is located below a seal.

* A '''transition zone''' is the interval of rock separating the reservoir from the aquifer; it is less than 100% saturated with water.

* A '''transition zone''' is the interval of rock separating the reservoir from the aquifer; it is less than 100% saturated with water.

* An '''aquifer''' is a porous and permeable rock 100% saturated with water. It has one or more containers that may or may not be shared with a reservoir.

* An '''aquifer''' is a porous and permeable rock 100% saturated with water. It has one or more containers that may or may not be shared with a reservoir.