It is important to determine the reasonable injection and production rates in the development of multilayer tight oil reservoir with water flooding treatment. Based on the INSIM (interconnection-based numeric simulation model), a connected network model, a new method is designed to evaluate the water injection efficiency of different layers in water flooding reservoirs and to optimize the injection-production system to produce more oil. Based on the types of sedimentary facies and corresponding injection-production data, the interwell connections are divided into four major categories (middle channel, channel edge, middle channel bar, and channel bar edge) and twelve subclasses. This classification standard of interwell connections could help to significantly improve the accuracy of judging the dominant flow path without constructing a complicated geological model. The interaction of interwells such as injection-production correlation and water injection efficiency could be revealed by simulating the production performance and computing the layer dividing coefficient and well dividing coefficient. A numerical example is used to validate this method by comparing results from FrontSim and this method, and the computational efficiency of this method is several dozen times faster than that of the traditional numerical simulation. This method is applied to quickly optimize the production schedule of a tight oil reservoir with the water flooding treatment, that is, the water injection rate of multilayer reservoirs could be optimized subtly by the injection efficiency of different layers, and the target of producing more oil with lower water cut could be achieved.

中文翻译：

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多层致密油藏注水效率评价与实时优化新方法

在水驱处理多层致密油油藏开发中，合理确定注采速度十分重要。基于互联网络模型INSIM（interconnection-based numeric simulation model），设计了一种新的方法来评价水驱油藏不同层的注水效率，优化注采系统以增产油。根据沉积相类型和相应的注采资料，将井间连接分为四大类（中通道、通道边缘、中通道坝、通道坝边缘）和12个亚类。这种井间连接的分类标准有助于在不构建复杂地质模型的情况下显着提高判断优势流径的准确性。通过模拟生产动态，计算层间分割系数和井间分割系数，可以揭示井间交互作用，如注采关联和注水效率。通过算例对FrontSim与该方法的结果进行对比验证，该方法的计算效率比传统数值模拟快几十倍。该方法用于快速优化水驱处理的致密油油藏生产进度，即：