Production fluid, or well fluid, is the fluid mixture of oil, gas and water in formation fluid that flows to the surface of an oil well from a reservoir. Its consistency and composition varies.

Fluids may be described by a multitude of characteristics including:

• Composition - the quantity of every molecular component within the fluid, eg methane, ethane, propane, i-butane, n-butane, etc

• Water cut - the proportion of the fluid, which is water rather than hydrocarbons.
• API gravity - the oilfield measurement of the weight of the hydrocarbons.
• GOR - Gas to oil ratio describing how many standard cubic feet of gas can be obtained for every stock tank barrel of oil.
• H₂S - the concentration of this gas. Fluids with a high concentration of H₂S are described as "sour".
• Contaminants such as mercury which may require special material selection and handling
• BS&W - Base sediment and water which settles out during storage

In addition physical properties may include:

• Wellhead flowing pressure
• Wellhead shut-in pressure
• Wellhead flowing temperature

See also

• Produced water

External links

• Schlumberger Oilfield Glossary: produced fluid Archived 2012-07-16 at the Wayback Machine

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