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What is a water injection well

In the process of oilfield development, water is injected into the reservoir through special water injection wells to maintain or restore the reservoir pressure so that the reservoir has a strong driving force to improve the production speed and recovery ratio of the reservoir.  According to the reservoir structure, area, permeability, distribution of oil, gas and water and the required development indexes, the distribution position of water injection well and the relative relationship with production well ( called water injection method ) are selected.  The determination of well spacing of injection wells is based on the principle that most oil layers can be subjected to water injection, so that oil wells can be fully subjected to water injection effect and achieve the required oil recovery rate and oil layer pressure.

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