石油学报 ›› 2022, Vol. 43 ›› Issue (8): 1145-1157.DOI: 10.7623/syxb202208009

• 油田开发 • 上一篇    下一篇

耐温耐盐酚醛冻胶研制及性能调控机理

葛际江1, 郭洪宾1, 张天赐1, 周代余2, 许雅1, 吕琦1   

  1. 1. 中国石油大学(华东)石油工程学院 山东青岛 266580;
    2. 中国石油塔里木油田公司勘探开发研究院 新疆库尔勒 841000
  • 收稿日期:2021-03-21 修回日期:2022-04-02 出版日期:2022-08-25 发布日期:2022-09-05
  • 通讯作者: 葛际江,男,1972年6月生,2002年获石油大学(华东)油气田开发工程专业博士学位,现为中国石油大学(华东)石油工程学院教授、博士生导师,主要从事油田化学方面的教学和科研工作。
  • 作者简介:葛际江,男,1972年6月生,2002年获石油大学(华东)油气田开发工程专业博士学位,现为中国石油大学(华东)石油工程学院教授、博士生导师,主要从事油田化学方面的教学和科研工作。Email:gejijiang@163.com
  • 基金资助:
    中国石油天然气集团有限公司科技计划专项(ZD2019-183-007-003)资助。

Development of temperature and salinity resistant phenolic gel and its performance regulation mechanism

Ge Jijiang1, Guo Hongbin1, Zhang Tianci1, Zhou Daiyu2, Xu Ya1, Lü Qi1   

  1. 1. School of Petroleum Engineering, China University of Petroleum, Shandong Qingdao 266580, China;
    2. Research Institute of Petroleum Exploration and Development, PetroChina Tarim Oilfield Company, Xinjiang Korla 841000, China
  • Received:2021-03-21 Revised:2022-04-02 Online:2022-08-25 Published:2022-09-05

摘要: 注水油藏控水稳油过程中最常用的堵剂之一是聚合物冻胶,而存在高温高盐苛刻条件的油藏中冻胶应用的关键是其耐温抗盐性能。因此分别评价了在盐含量为25×104mg/L的模拟盐水中,110℃和155℃条件下不同分子结构的丙烯酰胺(AM)/2-丙烯酰胺-2-甲基丙磺酸(AMPS)二元共聚物和AM/AMPS/N-乙烯基吡咯烷酮(NVP)三元共聚物与对苯二酚、六亚甲基四胺交联制备的冻胶成胶性能,明确了以AMPS含量为30%的AM/AMPS共聚物做主剂更容易形成稳定冻胶。通过分析不同脱水程度冻胶的固体核磁共振碳谱(C-NMR)谱图发现,耐温耐盐冻胶的重要特征是长期热处理后仍保持一定含量的酰胺基甲基丙磺酸。在此基础上综合冻胶的冷冻扫描电镜(Cryo-SEM)和红外光谱(FTIR)分析结果认为,选择高AMPS含量的聚合物,调控交联剂的用量,可以优化冻胶中伯酰胺、酰胺基甲基丙磺酸等盐敏基团的存在状态,由此有效抑制酰胺基甲基丙磺酸的内催化水解,从而调控冻胶的耐温耐盐性能。

关键词: 冻胶, 耐温抗盐, AM/AMPS, AM/AMPS/NVP, 控水稳油

Abstract: As a plugging agent,polymer gel is one of the most commonly used in the process of conformance control in water-flooding reservoirs,and the key to the application of gel in reservoirs in the harsh conditions of high temperature and high salinity is its temperature and salinity-resistance performance.Therefore,this paper evaluates the forming performance of gels prepared by cross-linking acrylamide (AM)/2-acrylamide-2-methylpropanesulfonic acid (AMPS) coplymers and AM/AMPS/N-vinylpyrrolidone (NVP) terpolymer with hydroquinone and hexamethylenetetramine in simulated brine with a salinity of 25×104mg/L at 110℃ and 155℃,respectively.It is clear that AM/AMPS copolymer with 30% AMPS content as the main agent is more likely to form a stable gel.The analysis of solid-state nuclear magnetic resonance carbon (C-NMR) spectroscopy of gels with different degrees of dehydration reveals that the temperature and salinity-resistant gels are mainly characterized by the retention of a certain amount of amido methylpropanesulfonic acid after long-term heat treatment.On this basis,the results of cryo-SEM and FTIR analysis indicate that the selection of polymers with high AMPS content and the regulation of the amount of cross-linking agent can optimize the salinity-sensitive groups such as primary amide and amido methylpropanesulfonic acid in the gel,thus effectively inhibiting the intramolecular catalytic hydrolysis of amido methylpropanesulfonic acid and regulating the temperature and salinity resistance of the gel.

Key words: gel, temperature and salinity resistance, AM/AMPS, AM/AMPS/NVP, water control and oil stabilization

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