超稠油改质降黏分子模拟及机理

doi:10.7623/syxb201503010

石油学报 ›› 2015, Vol. 36 ›› Issue (3): 355-360.DOI: 10.7623/syxb201503010

超稠油改质降黏分子模拟及机理

吴川¹, 张汝生¹, 张祖国¹, 孙志宇¹, 吴正彬²

1. 中国石油化工股份有限公司石油勘探开发研究院北京 100083;
2. 中国石油大学石油工程学院北京 102249

收稿日期:2014-08-17 修回日期:2014-12-24 出版日期:2015-03-25 发布日期:2015-03-11
通讯作者: 吴川,男,1983年6月生,2005年毕业于长江大学应用化学专业,2011年获中国石油大学(华东)油气田开发工程专业博士学位,现为中国石油化工股份有限公司石油勘探开发研究院高级工程师,主要从事稠油降黏及采油工艺方面的研究工作。Email:wciwlf@126.com
作者简介:吴川,男,1983年6月生,2005年毕业于长江大学应用化学专业,2011年获中国石油大学(华东)油气田开发工程专业博士学位,现为中国石油化工股份有限公司石油勘探开发研究院高级工程师,主要从事稠油降黏及采油工艺方面的研究工作。Email:wciwlf@126.com
基金资助:
国家重大科技专项(2011ZX05031-003-004)、中国石油化工股份有限公司科技部前瞻项目(G5800-13-ZS-KJB033-1)、中国石油化工股份有限公司石油勘探开发研究院院控项目(G5800-13-ZS-YK003-5)资助

Molecular simulation and mechanism for upgrading and viscosity reduction of extra-heavy oil

Wu Chuan¹, Zhang Rusheng¹, Zhang Zuguo¹, Sun Zhiyu¹, Wu Zhengbin²

1. Sinopec Petroleum Exploration and Production Research Institute, Beijing 100083, China;
2. College of Petroleum Engineering, China University of Petroleum, Beijing 102249,China

Received:2014-08-17 Revised:2014-12-24 Online:2015-03-25 Published:2015-03-11

摘要/Abstract

摘要：

为了研究微乳液纳米镍对特超稠油的改质降黏效果,利用分离改质降黏前、后的特超稠油,对反应前、后稠油重质组分沥青质及胶质的平均分子量、元素及核磁共振进行测定,结合化学分子模拟软件Hyperchem对特超稠油改质降黏进行了分子模拟及机理研究。模拟实验结果表明:特超稠油经过改质降黏反应后,其黏度大幅度下降,氢/碳原子比升高;沥青质与胶质分子的尺寸明显减小,沥青质分子量降低幅度较大;改质降黏剂能与特超稠油重质组分稠环芳烃盘状中心核沥青质接触,并导致其稳定的盘状芳环结构破坏,从而使沥青质分子的聚集状态得以改善,胶质分子稳定沥青质分子的作用增强。

关键词: 特超稠油, 改质降黏, 分子模拟, 催化, 机理

Abstract:

To study the upgrading and viscosity reduction effect of micro-emulsion nano-nickel on extra-heavy oil, the extra-heavy oil prior and posterior to separation, upgrading and viscosity reduction was used for measuring the average molecular weight, elements and nuclear magnetic resonance of asphaltene and gum as heavy components of heavy oil before and after reaction. In combination with the chemical molecule simulation software Hyperchem, molecular simulation and mechanism research was carried out on the upgrading and viscosity reduction of extra-heavy oil. The results of simulation experiments show that after upgrading and viscosity reduction, the viscosity of extra-heavy oil is reduced greatly, and the atomic ratio of hydrogen to carbon is increased; the sizes of asphaltene and gum molecules are reduced significantly, and the molecular weight of asphaltene presents a large decline magnitude; the upgrading and viscosity reducing agent is contacted with asphaltene in the discoid centronucleus of condensed aromatics as a heavy component of extra-heavy oil, leading to the failure of stable discoid aromatic ring structure, so as to improve the aggregation status of asphaltene molecule and enhance the role of gum molecule in stabilizing asphaltene molecule.

Key words: extra-heavy oil, upgrading and viscosity reduction, molecular simulation, catalysis, mechanism

中图分类号:

TE357.46

吴川, 张汝生, 张祖国, 孙志宇, 吴正彬. 超稠油改质降黏分子模拟及机理[J]. 石油学报, 2015, 36(3): 355-360.

Wu Chuan, Zhang Rusheng, Zhang Zuguo, Sun Zhiyu, Wu Zhengbin. Molecular simulation and mechanism for upgrading and viscosity reduction of extra-heavy oil[J]. Acta Petrolei Sinica, 2015, 36(3): 355-360.

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超稠油改质降黏分子模拟及机理

Molecular simulation and mechanism for upgrading and viscosity reduction of extra-heavy oil

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