注入流体(而不是产出流体)的井，其主要用途一般是保持储层压力。
A well in which fluids are injected rather than produced, the primary objective typically being to maintain reservoir pressure.
若产气比产液体更可取，则可向井中注入流体以保持储层压力。
Reservoir pressure can be maintained by fluid injection if gas production is preferable to liquid production.
开发过程中普遍存在注水井长期注入压力居高不下、注入量低、单井注入压力差异大等问题。
It universally exists that injected pressure is high in a long time, injected water volume is low, the difference of injected pressure of each well is very large during oilfield development.
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