Evaluation of the performance of different polymer gel systems as an in-depth gel treatment using numerical simulation
非均质和天然裂缝储层的油田生产通常会受到高渗透条带和天然裂缝网络的影响。如果高渗透层向低渗透层进行交叉流动并且具有高运移率，油田产量可能会更低。这些问题称为驱替效率问题，处理方法称为调剖改善技术（CITs）。
CIT的目标是改善储层的非均质性并降低不利运移率。这些技术导致将处理后的水流入低渗透层并增加置换流体（例如水）的粘度。因此，总的驱油效率可以提高，从而促进油田生产。
对聚合物驱油和凝胶处理潜力的评估需要准确地对可能影响这些过程的不同参数进行模拟。选择最佳的聚合物凝胶系统需要了解其在储层内的表现。
这项工作的主要目标和原则贡献是建立不同的模型来模拟不同情景和不同凝胶系统的深层凝胶处理性能。在这项研究中，我们为每种被研究的聚合物凝胶系统开发了单独的模型。已经对不同参数进行了审查，并得出了最佳参数。通过了解这些最佳参数，每种聚合物凝胶系统的成功应用可能导致最大的效益和最大的油田生产。
Abstract
“Oil production from heterogeneous and naturally fractured reservoirs are usually hindered due to the presence of high-permeability streaks and natural fractures networks. Oil production could be more lowered if there is a crossflow from the high- to the low-permeability layers and high mobility ratio. These problems are called conformance problems and the treatment is called conformance improvement technologies (CITs). The aims of CIT is to correct the heterogeneity of the reservoir and to lower the unfavorable mobility ratio. These technologies are leading to the diversion of post-treatment water into the low-permeability layers and to increase the viscosity of the displacing fluid (e.g., water). Therefore, overall sweep efficiency, could be improved and an enhancement to oil production could occur.
Assessment of the potential of polymer flooding and gel treatment requires accurate modeling of different parameters that could affect these processes. Selecting of the best polymer gel system requires an understanding of its performance inside the reservoir. The main aim and principle contribution of this work is to build different models to simulate the performance of in-depth gel treatment with different scenarios and different gel systems, using different reservoir simulators.
In this study, we developed a separate model for each polymer gel system that has been investigated. Different parameters have been scrutinized and the optimum parameters have been concluded. By knowing these optimum parameters, a successful application of each polymer gel system could lead to maximum benefits and maximum oil production.
Keyworkds
Chemical Enhanced Oil Recovery; In-Situ Polymer Gels; Numerical Simulation; Polymer Gels; Polymer Solutions; Preformed Polymer Gels
