Conventional fixed allocation production and allocation injection method has the defects of uneven water
flooding, injection-production loss of constant, which can affect water flooding development efficiency. Therefore, we put
forward a real-time dynamic optimization water injection method for the different development time and different injection
wells with different injection allocation systems. This method converts the optimization of the system into mathematical
equations, focuses on discussing objective function gradient algorithm. The implementation process of the adjoint
method calculation gradient is proposed. Gradient calculation and the detailed steps of real-time dynamic optimization
water injection are also offered. Finally, an "L" shaped fault block oil reservoir conducted the simulation validation. The
results show that the use of the adjoint method real-time dynamic optimization approach for injection method is better
than the conventional fixed water injection allocation approach, which can better improve oil displacement efficiency and
provide important technical support for the formulation of oil field water injection program patent.
Keywords: Adjoint method, dynamic water injection gradient, field, oil optimization, water flooding.
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