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Analytical model of well injectivity improvement using nanofluid preflush

机译:纳米流体预冲洗提高注井能力的解析模型

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This paper evaluates nanoparticle preflush to prevent the decline of well injectivity due to fines migration near the wellbore in oil & gas production, or wastes disposal fields. Nanoparticles pre-coated on the rock grains in 1-D porous medium is one of common approaches to prevent the migration of fine particles in reservoirs. In this paper, the positive contributions of nanoparticles to reduce fines migration are hypothesized as the increase of the maximum particles retention capacity of the host rocks due to reduction of repulsive force between nanoparticles-coated rock grains and fine particulates. By applying method of characteristics, series of analytic particles suspension flow solutions considering fine particles attachment/ detachment and particles straining effects are developed for the cases of nanoparticles preflush and two different reference scenarios attributed to content of clay fines in host reservoirs.
机译:本文评估了纳米颗粒预冲洗,以防止由于油气生产或废物处置领域中井筒附近的细粒迁移而导致的井注量下降。在一维多孔介质中预涂在岩石颗粒上的纳米颗粒是防止细颗粒在储层中迁移的常用方法之一。在本文中,由于降低了纳米颗粒包覆的岩石颗粒与细颗粒之间的排斥力,因此推测了纳米颗粒对减少细粒迁移的积极贡献是由于基质岩石的最大颗粒保留能力的提高。通过应用特性方法,针对纳米颗粒预冲洗的情况开发了考虑细颗粒附着/分离和颗粒应变效应的一系列分析颗粒悬浮液解决方案,并归因于宿主储层中粘土细粒含量的两种不同的参考方案。

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