新型交联聚合物微球调驱性能研究

doi:10.11885/j.issn.1674-5086.2021.09.09.04

摘要/Abstract

摘要： 渤海油田地层具有高孔高渗、疏松脆弱、非均质性强的特点，部分井组存在注入水低效或无效循环、水窜加快和递减率大等问题。现场应用试验表明，新型交联聚合物微球P-90对该类储层具有更好的调驱效果。为更好分析和解释其调驱机理，采用扫描电镜、激光粒度仪、高温高压流变仪、微孔滤膜装置和一维物模流动装置等对P-90的基本理化性能与调驱能力进行了评价实验。结果表明，新型交联聚合物微球P-90溶胀效果好，水化溶胀后微球之间相互交联形成空间网状结构，粒径均匀分布并长期保持在15 μm，具有良好的耐温性及黏度保留率；对孔径5、10 μm微孔滤膜产生了有效封堵；新型交联聚合物微球P-90同时具备了聚合物凝胶交联网状结构与聚合物微球球形分散结构。其独特的微观结构对于非均质高孔高渗油藏有更好的改善作用，极大提高了封堵、驱油效率，可达到较好的深部调驱效果。

关键词: 交联聚合物微球, 微孔滤膜, 深部调驱, 提高采收率, 高孔高渗

Abstract: Bohai Oilfield is characteristic of high porosity and high permeability, loose and fragile, strong heterogeneity. Some well groups have encountered the problems of low efficiency or ineffective circulation of injected water, accelerated water channeling and increased decline rate. Field application test shows that the new cross-linked polymer microsphere P-90 has better profile control and flooding effect for this type of reservoir. In order to better analyze and explain its profile control and flooding mechanism, scanning electron microscopy, laser particle size analyzer, high temperature and high pressure rheometer, microporous filter membrane device, one-dimensional physical model flow device, etc. are employed to evaluate the basic physical and chemical properties and profile control and flooding capability of P-90. The experimental results show that the new crosslinked polymer microsphere P-90 has good swelling effect. After hydration and swelling, a cross-linked spatial network structure is formed between the spheres. The particle size is evenly distributed and remains at 15 μm for a long time. It has good temperature resistance and viscosity retention rate; the membrane with pore size of 5 and 10 μm was effectively blocked. This new crosslinked polymer microsphere P-90 has both the crosslinked network structure of polymer gel and the spherical dispersion structure of polymer microspheres. Its unique microstructure has a significant improvement effect on heterogeneous high porosity and high permeability reservoirs. It has good injectivity, with greatly improved plugging and oil displacement efficiency, and can achieve better deep profile control and flooding effect.

Key words: crosslinked polymer microspheres, microporous membrane, deep profile control and flooding, enhanced oil recovery, high porosity and high permeability

中图分类号:

TE357

周海燕, 张运来, 何逸凡, 缪飞飞. 新型交联聚合物微球调驱性能研究[J]. 西南石油大学学报(自然科学版), 2022, 44(6): 175-182.

ZHOU Haiyan, ZHANG Yunlai, HE Yifan, MIAO Feifei. A Study on Profile Control and Flooding Performance of New Crosslinked Polymer Microspheres[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(6): 175-182.

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http://journal15.magtechjournal.com/Jwk_xnzk/CN/Y2022/V44/I6/175

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