Simultaneous utilization of surfactant and preformed particle gel (henceforth; PPG) flooding on the oil recovery enhancement has been widely investigated as a preferable enhanced oil recovery technique after the polymer flooding. In this paper, a numerical model is developed to simulate the profound impact of hybrid chemical enhanced oil recovery methods (PPG/polymer/surfactant) in sandstone reservoirs. Moreover, the gel particle conformance control is considered in the developed model after polymer flooding performances on the oil recovery enhancement. To validate the developed model, two sets of experimental field data from Daqing oil field (PPG conformance control after polymer flooding) and Shengli oil field (PPG-surfactant flooding after polymer flooding) are used to check the reliability of the model. Combination of preformed gel particles, polymers and surfactants due to the deformation, swelling, and physicochemical properties of gel particles can mobilize the trapped oil through the porous media to enhance oil recovery factor by blocking the high permeable channels. As a result, PPG conformance control plays an essential role in oil recovery enhancement. Furthermore, experimental data of PPG/polymer/surfactant flooding in the Shengli field and its comparison with the proposed model indicated that the model and experimental field data are in a good agreement. Consequently, the coupled model of surfactant and PPG flooding after polymer flooding performances has led to more recovery factor rather than the basic chemical recovery techniques.

中文翻译：

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混合化学强化采油技术：模拟研究

同时利用表面活性剂和预制颗粒凝胶（以下简称 PPG）驱提高采收率已被广泛研究作为聚合物驱后优选的提高采收率技术。在本文中，开发了一个数值模型来模拟混合化学提高采收率方法（PPG/聚合物/表面活性剂）对砂岩储层的深远影响。此外，在聚合物驱油性能提高采收率后，开发模型中考虑了凝胶颗粒一致性控制。为验证模型的有效性，利用大庆油田（聚驱后PPG一致性控制）和胜利油田（聚驱后PPG-表面活性剂驱）的两组现场实验数据验证模型的可靠性。预制凝胶颗粒的组合，由于凝胶颗粒的变形、溶胀和物理化学性质，聚合物和表面活性剂可以通过多孔介质移动捕获的油，通过阻塞高渗透通道来提高采油率。因此，PPG 一致性控制在提高石油采收率方面起着至关重要的作用。此外，胜利油田PPG/聚合物/表面活性剂驱的实验数据及其与所提出模型的对比表明，模型与现场实验数据吻合较好。因此，聚合物驱油性能之后的表面活性剂和 PPG 驱油的耦合模型导致了更高的采收率，而不是基本的化学采收技术。凝胶颗粒的物理化学性质可以通过多孔介质移动被困油，通过阻塞高渗透通道来提高采收率。因此，PPG 一致性控制在提高石油采收率方面起着至关重要的作用。此外，胜利油田PPG/聚合物/表面活性剂驱的实验数据及其与所提出模型的对比表明，模型与现场实验数据吻合较好。因此，聚合物驱油性能之后的表面活性剂和 PPG 驱油的耦合模型导致了更高的采收率，而不是基本的化学采收技术。凝胶颗粒的物理化学性质可以通过多孔介质移动被困油，通过阻塞高渗透通道来提高采收率。因此，PPG 一致性控制在提高石油采收率方面起着至关重要的作用。此外，胜利油田PPG/聚合物/表面活性剂驱的实验数据及其与所提出模型的对比表明，模型与现场实验数据吻合较好。因此，聚合物驱油性能之后的表面活性剂和 PPG 驱油的耦合模型导致了更高的采收率，而不是基本的化学采收技术。胜利油田PPG/聚合物/表面活性剂驱实验数据与模型对比表明模型与实验数据吻合较好。因此，聚合物驱油性能之后的表面活性剂和 PPG 驱油的耦合模型导致了更高的采收率，而不是基本的化学采收技术。胜利油田PPG/聚合物/表面活性剂驱实验数据与模型对比表明模型与实验数据吻合较好。因此，聚合物驱油性能之后的表面活性剂和 PPG 驱油的耦合模型导致了更高的采收率，而不是基本的化学采收技术。