不同单体配比的Fe3O4@CPAM对稠油微波破乳的促进效应

doi:10.7623/syxb202408008

石油学报 ›› 2024, Vol. 45 ›› Issue (8): 1257-1269.DOI: 10.7623/syxb202408008

• 油田开发 • 上一篇

不同单体配比的Fe₃O₄@CPAM对稠油微波破乳的促进效应

孙娜娜^1,2, 马玉丽¹, 胡建波¹, 董红妹¹

1. 西安石油大学石油工程学院陕西西安 710065;
2. 陕西省油气田特种增产技术重点实验室, 西安石油大学陕西西安 710065

收稿日期:2024-01-23 修回日期:2024-05-24 发布日期:2024-09-04
通讯作者: 孙娜娜，女，1987年10月生，2016年获西南石油大学博士学位，现为西安石油大学石油工程学院副教授，主要从事稠油降黏和微波化学破乳技术研究。Email:bingyuxuan6666@126.com
作者简介:孙娜娜，女，1987年10月生，2016年获西南石油大学博士学位，现为西安石油大学石油工程学院副教授，主要从事稠油降黏和微波化学破乳技术研究。Email:bingyuxuan6666@126.com
基金资助:
西安市青年科技托举项目(095920221360)和西安石油大学研究生创新与实践能力培养计划项目(YCS23213039)资助。

Promotion effect of Fe₃O₄@CPAM with different monomer ratios on microwave demulsification of heavy oil

Sun Nana^1,2, Ma Yuli¹, Hu Jianbo¹, Dong Hongmei¹

1. College of Petroleum Engineering, Xi'an Shiyou University, Shannxi Xi'an 710065, China;
2. Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, Xi'an Shiyou University, Shaanxi Xi'an 710065, China

Received:2024-01-23 Revised:2024-05-24 Published:2024-09-04

摘要/Abstract

摘要： 为了进一步深入研究化学驱高效破乳机理,合成了不同单体配比(丙烯酰胺和甲基丙烯酰氧乙基三甲基氯化铵所占的质量分数)的新型磁性纳米粒子Fe₃O₄@CPAM,并通过X-射线衍射分析、傅里叶红外光谱分析、热重分析、磁性分析等实验验证了合成效果。通过对比分析Fe₃O₄、Fe₃O₄@CPAM(单体20%)、Fe₃O₄@CPAM(单体25%)浓度对稠油微波破乳的影响规律可以发现:浓度过高会抑制破乳效果,唯有浓度适宜,微波才会协同磁性纳米粒子进行破乳。此外,从油滴分布以及Zeta电位两个角度揭示了磁性纳米粒子对微波破乳的促进机理。研究结果表明:单独应用磁性纳米粒子 Fe₃O₄@CPAM(单体20%),在质量浓度为175 mg/L、沉降时间为30 min时,乳状液的分水率可以达到95.24%; 单独应用磁性纳米粒子Fe₃O₄@CPAM(单体25%),在质量浓度为200 mg/L、沉降时间为10 min时,乳状液的分水率可以达到100%。在微波辐射功率为200 W、辐射时间为20 s的条件下,磁性纳米粒子Fe₃O₄@CPAM(单体20%)、Fe₃O₄@CPAM(单体25%)的质量浓度分别为75 mg/L、50 mg/L,沉降时间分别为30 min、20 min时,乳状液的分水率分别可以达到96.49%、99.10%。由此证实微波与新型磁性纳米粒子之间存在耦合协同作用,可显著降低磁性纳米粒子的用量。

关键词: 微波, 磁性纳米粒子, 合成, 分水率, 油滴分布, Zeta电位

Abstract: In order to further study the efficient demulsification mechanism of chemical flooding, a new type of magnetic nanoparticle Fe₃O₄@CPAM with different monomer ratios (mass fraction of acrylamide and methacryloyloxyethyl trimethyl ammonium chloride) was synthesized, and this successful synthesis was confirmed through a series of characterization methods such as X-ray diffraction analysis, Fourier transform infrared spectroscopy analysis, thermogravimetric analysis, and vibrating sample magnetometer analysis. A comparative analysis was conducted on the effects of Fe₃O₄, Fe₃O₄@CPAM (monomer 20%), and Fe₃O₄@CPAM (monomer 25%) concentrations on the microwave demulsification of heavy oil. The study shows that a too high concentration can inhibit the demulsification effect, and only when the concentration is appropriate, can microwave coordinate with magnetic nanoparticles for demulsification. In addition, the promotion mechanism of magnetic nanoparticles for microwave demulsification was also revealed from the perspectives of oil droplet distribution and Zeta potential. The results show that when the magnetic nanoparticles Fe₃O₄@CPAM (monomer 20%) are used alone, the diversion ratio of the emulsion can reach 95.24% at the mass concentration of 175 mg/L and sedimentation time of 30 minutes; when the magnetic nanoparticles Fe₃O₄@CPAM (monomer 25%) are only used, the diversion ratio of the emulsion can reach 100% at the mass concentration of 200 mg/L and sedimentation time of 10 minutes. At the microwave radiation power of 200 W and radiation time of 20 s, the mass concentrations of magnetic nanoparticles Fe₃O₄@CPAM (monomer 20%) and Fe₃O₄@CPAM (monomer 25%) are 75 mg/L and 50 mg/L, and the sedimentation durations are 30 minutes and 20 minutes, respectively; the diversion ratio of the emulsion can reach 96.49% and 99.10%, respectively. The above results have confirmed that there is a coupling synergy between microwave and the new-type magnetic nanoparticles, which can significantly reduce the amount of magnetic nanoparticles used.

Key words: microwave, magnetic nanoparticle, synthesis, diversion ratio, oil droplet distribution, Zeta potential

中图分类号:

TE357

孙娜娜, 马玉丽, 胡建波, 董红妹. 不同单体配比的Fe₃O₄@CPAM对稠油微波破乳的促进效应[J]. 石油学报, 2024, 45(8): 1257-1269.

Sun Nana, Ma Yuli, Hu Jianbo, Dong Hongmei. Promotion effect of Fe₃O₄@CPAM with different monomer ratios on microwave demulsification of heavy oil[J]. Acta Petrolei Sinica, 2024, 45(8): 1257-1269.

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不同单体配比的Fe₃O₄@CPAM对稠油微波破乳的促进效应

Promotion effect of Fe₃O₄@CPAM with different monomer ratios on microwave demulsification of heavy oil

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