Water Cut

Definition - What does Water Cut mean?

Water Cut is the ratio of produced water compared to the volume of the total produced fluids in a well. For crude oil, it can be referred to as the percentage of the mass of water in all liquids. It is an essential parameter together with the GOR (gas to oil ratio) of crude oil, as they clearly indicate the content of water in the reservoir fluids. In water-drive reservoirs, the Water Cut can reach a very high value.

Petropedia explains Water Cut

Water Cut is generally expressed in percentage form. The crude oil flowing in a pipeline is usually measured by a device known as Water Cut meter. The meter can be used typically in the mineral and oil industry for measuring:

  • The Water Cut
  • Oil produced from the separator
  • Oil that is flowing from the well
  • Crude oil transferred in pipelines and loading tankers.

Various technologies are used in the measurement; however, the main technologies are the dielectric measurements using microwave or radio frequencies and the NIR measurements. The less common technologies are the instruments based on gamma rays.

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