How does surfactant aid the displacement of oil by water in nanoscale cracks?
How does surfactant aid the displacement of oil by water in nanoscale cracks?
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表面活性剂如何帮助纳米级裂缝中的水驱油？
DOI：
10.1016/j.fuel.2023.128248
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发表时间：
2023
期刊：
影响因子：
7.4
通讯作者：
Ducker, William A.
中科院分区：
文献类型：
--
作者：
Zhang, Zechen;Ducker, William A.
水驱油是提高石油采收率的核心问题。在本文中，我们提出了在纳米级玻璃通道中水驱油的实验研究。该通道厚 100 nm，由亲水玻璃组成，一端封闭。在零施加压力下检查位移。研究了三种表面活性剂帮助驱油的能力：十二烷基硫酸钠（SDS），一种阴离子表面活性剂；气雾剂 OT (AOT)，一种阴离子表面活性剂；和十二烷基三甲基溴化铵（DTAB），一种阳离子表面活性剂。 AOT 是唯一能在 12 小时内驱油的表面活性剂。 AOT也是三种表面活性剂中唯一能够在油相中形成反胶束的一种，我们将驱油归因于反胶束将水输送到亲水玻璃。我们通过实验证明了这一结论：(a) 反胶束较少，位移较小；(b) 水相是不连续的。后者意味着水通过油相输送。因此，这项工作的结论是，表面活性剂通过增强水通过油的输送来帮助从亲水通道采油。输送的水可以吸附在固体上，并且继续输送可以自发地形成大量水相，从而驱替油。
The displacement of oil by water is the central concern in enhanced oil recovery. In this paper, we present an experimental study of the displacement of oil by water in a nano-scale, glass channel. The channel was 100 nm thick, composed of hydrophilic glass, and was closed at one end. Displacement was examined under zero applied pressure. Three surfactants were examined for their ability to aid displacement of oil: sodium dodecylsulfate (SDS), an anionic surfactant; Aerosol OT (AOT), an anionic surfactant; and dodecyltrimethylammonium bromide (DTAB), a cationic surfactant. AOT was the only surfactant that caused displacement of oil within 12 h. AOT is also the only one of the three surfactants that can form reverse micelles in the oil phase, and we attribute the oil displacement to the delivery of water to the hydrophilic glass by reverse micelles. We support this conclusion with experiments showing (a) lesser displacement with fewer reverse micelles and (b) that the water phase is discontinuous. The latter implies transport of water through the oil phase. Therefore, the conclusion of this work is that the surfactant aids oil recovery from a hydrophilic channel by enhancing transport of water through oil. The delivered water can adsorb at the solid and continued transport can spontaneously grow a bulk water phase, thereby displacing the oil.
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期刊：
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DOI：
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发表时间：
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期刊：
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DOI：
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发表时间：
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