| 曹瑞波*,高倩.聚合物驱交替注入改善吸液剖面的力学机制及效果评价方法[J].实验力学,2016,31(2):231~237 |
| 聚合物驱交替注入改善吸液剖面的力学机制及效果评价方法 |
| On the Mechanics Mechanism and Evaluation Method in Fluid Absorption Profile Improvement of Polymer Flooding Alternate Injection |
| 投稿时间：2015-06-03 修订日期：2015-12-29 |
| DOI：10.7520/1001-4888-15-090 |
| 中文关键词: 聚合物驱 单一段塞注入方式 交替注入方式 吸液剖面 剖面返转 |
| 英文关键词:polymer flooding single slug injection pattern alternate injection mode fluid absorption profile profile reverse |
| 基金项目:国家科技“十二五”重大专项“大庆长垣特高含水油田提高采收率示范工程”(2011ZX05052)资助 |
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| 中文摘要: |
| 开发实践表明，聚合物驱采用单一段塞注入方式，暴露出了易发生剖面返转的问题。鉴于此，研究了通过交替注入方式改善吸液剖面的新型驱油方法。应用渗流力学基本定律，结合实验数据，论证了单一段塞注入剖面返转及交替注入抑制剖面返转的力学机制。结果表明，注聚合物过程中高、低渗层阻力系数表现规律不同，而交替注入方式能够使高、低渗层阻力系数表现规律趋同，是单一段塞注入方式发生剖面返转、交替注入方式抑制剖面返转的根本原因。本文建立了用低、高渗层累积阻力系数的比值作为吸液剖面改善效果的评价方法，该比值越小，低渗层吸液比例越高，吸液剖面改善效果越好。 |
| 英文摘要: |
| Development practice shows that the polymer flooding using a single slug injection method has exposed the problem of profile reverse. In view of this, a new oil displacement method of improving fluid absorption profile by using alternate injection mode was studied. Based on the basic law of seepage mechanics and combining with experimental data, the mechanics mechanism of profile reverse by using single slug injection pattern and alternate injection mode was demonstrated, respectively. Results show that in polymer injection process, the resistance coefficients of low and high permeability layers present different variation pattern, while alternate injection mode can largely reduce the resistance coefficient difference between low and high permeability layers. This may be the fundamental reason for inducing profile reverse by using single slug injection pattern and inhibiting profile reverse by using alternate injection mode. To evaluate the improvement in fluid absorption profile, a specific value, which equals to the ratio of accumulated resistance factor in the lower permeability layer to that in the higher permeability layers, was set up. The lower the value is, the better the improvement is. |
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