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首页> 外文期刊>Energy Science and Technology >Efficiency of Horizontal and Vertical Well Patterns on the Performance of Micellar-Polymer Flooding in Anisotropic Reservoirs
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Efficiency of Horizontal and Vertical Well Patterns on the Performance of Micellar-Polymer Flooding in Anisotropic Reservoirs

机译：水平和垂直井网模式对各向异性油藏胶束-聚合物驱性能的影响

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摘要

There is increasing interest in micellar-polymer flooding because of the need to increase oil production from depleted and waterflooded reservoirs. Using horizontal wells for injection and production in a micellar-polymer flood process, higher sweep efficiency is expected compared with the use of conventional patterns by vertical wells. However, the use of horizontal wells is very sensitive to the well pattern designed to operate the process. This paper presents an analysis of how the overall performance of a micellar-polymer flood process in anisotropic reservoirs is influenced by the well pattern using horizontal injector and producer in different configurations. A three-dimensional numerical simulator for fluid flow and mass transport is used to analyze the effectiveness of well combinations in micellar-polymer applications. The potential for a horizontal well application was assessed through different situations in combinations of injection and production wells and degree of reservoir anisotropy. Results from the study have demonstrated that significant amount of oil can be recovered additionally and injectivity was remarkably improved by utilizing a combination of horizontal wells. The improvement of injectivity through a horizontal injection well was higher when it was combined with horizontal producer parallel to the injector. The overall performances in anisotropic reservoirs strongly depend on the type of wells considered and the orientation of the horizontal wells with respect to the permeability directions. Combination of horizontal wells placed parallel to the low permeability direction yields the best performance. In high permeability ratio reservoirs, the presence of horizontal injectors is more significant in defining the efficiency of the micellar-polymer flood than the horizontal producers.
机译：由于需要增加枯竭和注水油藏的石油产量，因此对胶束-聚合物驱油的兴趣日益增加。与在垂直井中使用常规井网相比，在胶束-聚合物驱过程中使用水平井进行注入和生产，预计扫掠效率更高。但是，水平井的使用对设计用于操作该工艺的井型非常敏感。本文介绍了在水平井中使用水平注入器和生产井的不同构造情况下，各向异性储层中胶束-聚合物驱过程的整体性能如何受到影响的分析。用于流体流动和质量传输的三维数值模拟器用于分析胶束聚合物应用中井组合的有效性。通过结合注入井和生产井以及储层各向异性程度的不同情况，评估了水平井应用的潜力。研究结果表明，通过组合水平井，可以额外回收大量油，并且可以显着提高注入能力。当水平注入井与平行于注入器的水平采油井结合使用时，通过水平注入井的注入能力的改善更高。各向异性储层的整体性能在很大程度上取决于所考虑的井的类型以及水平井相对于渗透率方向的方向。平行于低渗透率方向放置的水平井组合产生了最佳性能。在高渗透率的油藏中，水平注入井的存在比水平注入井对定义胶束-聚合物驱的效率更为重要。

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