化工进展 ›› 2020, Vol. 39 ›› Issue (12): 5234-5242.DOI: 10.16085/j.issn.1000-6613.2020-0354

• 精细化工 • 上一篇    下一篇

基于分子模拟的新型油溶性降黏剂的制备及性能优化

李熠宇1(), 吴琼2, 徐鹏3, 马爱青3, 侯影飞1()   

  1. 1.中国石油大学(华东)重质油国家重点实验室,山东 青岛 266580
    2.中国石油化工股份有限公司胜利油田 分公司石油工程技术研究院,山东 东营 257000
    3.山东省稠油开采技术重点实验室,山东 东营 257000
  • 出版日期:2020-12-05 发布日期:2020-12-02
  • 通讯作者: 侯影飞
  • 作者简介:李熠宇(1995—),男,硕士,研究方向为石油炼制与化工。E-mail:404840892@qq.com
  • 基金资助:
    中央高校基本科研业务费专项(18CX05001A);国家重点研发计划政府间国际科技创新合作重点专项(SQ2019YFE0115600)

Preparation and performance optimization of a new viscosity-reducing agent for crude oil based on molecular simulation

Yiyu LI1(), Qiong WU2, Peng XU3, Aiqing MA3, Yingfei HOU1()   

  1. 1.State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, Shandong, China
    2.Petroleum Engineering Technology Research Institute, Shengli Oilfield Company, SINOPEC, Dongying 257000, Shandong, China
    3.Shandong Provincial Key Laboratory of Heavy Oil Production Technology, Dongying 257000, Shandong, China
  • Online:2020-12-05 Published:2020-12-02
  • Contact: Yingfei HOU

摘要:

为了解决胜利油田稠油黏度高、开采困难等问题,通过分子模拟指导,以马来酸酐、甲基丙烯酸十八酯、N-乙烯基吡咯烷酮及苯乙烯进行四元共聚,获得了适合原油特性的降黏剂。以降黏率为考察指标,探讨了单体投料比例、最佳反应条件等对降黏效果的影响。结果表明,马来酸酐、甲基丙烯酸十八酯、N-乙烯基吡咯烷酮及苯乙烯投料摩尔比为4∶13.5∶8∶3、引发剂加量为1%(质量分数)、链转移剂用量为0.5%(质量分数)、80℃反应8h时,合成的降黏剂效果最好,且在降黏剂用量为0.3%(质量分数)时,可将原油黏度从1100mPa·s(50℃)降至403mPa·s,降黏率达到63.3%,原油凝点可从38.5℃降低至33.2℃,通过红外及氢谱等进行了表征,与预想分子结构一致。

关键词: 油溶性降黏剂, 四元聚合, 降黏率

Abstract:

This article provides a method to design a viscosity reducing agent, which builds a crude oil model through molecular simulation and calculates the type of monomer suitable for the viscosity reduction of the crude oil. Viscosity reducing agent was obtained by quaternary copolymerization of styrene with maleic anhydride, octadecyl methacrylate, and N-vinylpyrrolidone. The influence of various factors on the viscosity reduction was determined, and the optimal reaction conditions and monomer feeding ratio were obtained by measuring the viscosity reduction rate of crude oil, infrared spectrum and hydrogen spectrum. The results show that the feed ratio is 4∶13.5∶8∶3, and the reaction is performed at 80℃ for 8 hours. The amount of initiator is 1%(wt), the amount of chain transfer agent is 0.5% (mass fraction). The viscosity of crude oil can be reduced from 1100mPa·s (50℃) to 403mPa·s with a viscosity reduction rate of 63.3% by adding 0.3% (mass fraction) viscosity reducer. After testing the viscosity-temperature curve, it is found that the viscosity-reducing agent can effectively reduce the freezing point of crude oil from 38.5℃ to 33.2℃.The characterization by infrared spectrum and hydrogen spectrum indicates that it has the expected molecular structure.

Key words: oil-soluble viscosity reducing agent, quadripolymers, viscosity reduction

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