Production fluid

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Production 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:

  • 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".

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