Microcapsule flow behaviour in porous media
Microcapsule flow behaviour in porous media
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DOI：
10.1016/j.ces.2013.08.028
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发表时间：
2013-10-11
影响因子：
4.7
通讯作者：
Routh, Alexander F.
中科院分区：
文献类型：
--
作者：
Gun, Wei Jin;Routh, Alexander F.
本文研究了在提高石油采收率过程中使用核心为胶凝剂羟丙基纤维素的微胶囊的可能性。目的是封锁地层中被称为盗贼区的高渗透率区域，从而将追逐注入水转移到邻近的未波及的低渗透率区域。以聚乳酸-乙醇酸共聚物为聚合物壳，通过溶剂蒸发法通过聚合物沉淀制备温度触发微胶囊。亚甲基蓝的释放研究证明了温度诱导这些微胶囊的释放。制作了一个定制的储罐以允许多孔介质流动，并进行了单渗透性实验。即使没有胶凝剂，微胶囊也会逐渐堵塞ballotini孔网络。然而，通过改变罐温度，当胶囊释放其核心时，观察到渗透性下降。两个渗透性区域的实验表明，微胶囊对高渗透性层的堵塞比对低渗透性区域的堵塞更多。 (C) 2013 Elsevier Ltd. 保留所有权利。
This article investigates the possibility or using micro-capsules, with a gelling agent, hydroxypropyl cellulose, in the core, during enhanced oil recovery. The aim is to block off high permeability regions of a formation known as thief:zones, thereby diverting the chase injection water into adjacent unswept low permeability regions. Temperature triggered micro-capsules were made by polymer precipitation through a solvent evaporation method, with poly(lactic-co-glycolic) acid as the polymer shell. Release studies with methylene blue demonstrated the temperature induced release from these micro-capsules. A customised tank was made to allow porous media flow and single permeability experiments were conducted. Even without the gelling agent, the micro-capsules gradually blocked the ballotini pore network. However, by varying the tank temperature, a drop in permeability was observed when the capsules released their core. Experiments with two permeability regions showed that the micro-capsules clogged up the high permeability layer more than the low permeability region. (C) 2013 Elsevier Ltd. All rights reserved.