Recent Patents on Adjoint Method-based Real-time Dynamic Water Injection Optimization

Pang      Jin; Lei      Guanglun; Liu      Hong; Zhang      Xu; Li      Honglian

doi:10.2174/22132759113069990009

Abstract

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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