CO2响应型预交联凝胶颗粒的研制及性能评价

邓佳男; 郑昊; 高源鲜; 毕文良; 赵鸿浩; 贺甲元; 卢贵武; 张潇

doi:10.3969/j.issn.1006-6535.2025.02.014

特种油气藏 >

2025 , Vol. 32 >Issue 2: 110 - 116

DOI: https://doi.org/10.3969/j.issn.1006-6535.2025.02.014

油藏工程

CO₂响应型预交联凝胶颗粒的研制及性能评价

邓佳男 ,
郑昊 ,
高源鲜 ,
毕文良 ,
赵鸿浩 ,
贺甲元 ,
卢贵武 ,
张潇

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1.中国石油大学(北京)理学院,北京 102249;
2.中国石化石油勘探开发研究院,北京 102206

邓佳男(1995—),男,2018年毕业于北京化工大学高分子材料与工程专业,现为中国石油大学(北京)能源物理科学与技术专业在读博士研究生,主要从事油田化学及提高采收率方面的研究工作。

收稿日期: 2024-05-10

修回日期: 2025-02-13

网络出版日期: 2025-06-16

基金资助

国家自然科学基金企业创新发展联合基金集成项目“复杂环境下水泥环全生命周期密封理论与控制方法”(U22B6003-01)

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Development and performance evaluation of CO₂-responsive preformed particle gel

DENG Jia′nan ,
ZHENG Hao ,
GAO Yuanxian ,
BI Wenliang ,
ZHAO Honghao ,
HE Jiayuan ,
LU Guiwu ,
ZHANG Xiao

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1. College of Science of China University of Petroleum (Beijing), Beijing 102249, China;
2. Sinopec Petroleum Exploration and Production Research Institute, Beijing 102206, China

Received date: 2024-05-10

Revised date: 2025-02-13

Online published: 2025-06-16

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摘要

针对在CO₂驱替过程中,地层水形成酸性环境后导致凝胶颗粒(PPG)降解脱水的问题,以N,N-二甲基丙烯酰胺(DMAA)、乙烯基咪唑(VIZ)和N-乙烯基吡咯烷酮(NVP)3种CO₂响应型单体为主要原料,添加有机交联剂N,N-亚甲基双丙烯酰胺(MBA)和纳米交联剂VSNPs,通过水溶液聚合的方法制备了一种具有三重交联网络的CO₂响应型凝胶颗粒(CR-PPG),并开展了体系优化、CO₂响应性测试、电导率测试、流变测试和岩心驱替实验。研究表明:单体DMAA、VIZ、NVP的最佳配比为2∶2∶1;CR-PPG具有优异的CO₂响应特性和力学强度,其在CO₂驱替过程中具有高效的封堵调剖能力;CR-PPG的CO₂响应机理为其结构中叔胺基团在CO₂酸性环境下的质子化效应。该研究为CO₂驱替过程中的调堵作业提供了重要依据。

关键词： CO₂驱; 非均质储层; 三重交联; 预交联凝胶颗粒; 纳米交联剂

本文引用格式

邓佳男 , 郑昊 , 高源鲜 , 毕文良 , 赵鸿浩 , 贺甲元 , 卢贵武 , 张潇 . CO₂响应型预交联凝胶颗粒的研制及性能评价[J]. 特种油气藏, 2025 , 32(2) : 110 -116 . DOI: 10.3969/j.issn.1006-6535.2025.02.014

Abstract

In response to the issue of preformed particle gel (PPG) degradation and dehydration caused by the acidic environment formed during CO₂ flooding,a CO₂-responsive preformed particle gel (CR-PPG) with a triple crosslinked network was prepared using N,N-dimethylacrylamide (DMAA),vinylimidazole (VIZ),and N-vinylpyrrolidone (NVP) as the main raw materials,along with the organic crosslinking agent N,N′-methylenebisacrylamide (MBA) and the nano-crosslinking agent vinyl silica nanoparticles (VSNPs),through aqueous solution polymerization.System optimization,CO₂ responsiveness testing,conductivity testing,rheological testing,and core displacement experiments were conducted.The study shows that the optimal ratio of the monomers DMAA,VIZ,and NVP was found to be 2∶2∶1.The CR-PPG exhibited excellent CO₂ responsiveness and mechanical strength,demonstrating efficient plugging and profile control capabilities during CO₂ flooding.The CO₂ responsiveness mechanism of CR-PPG is attributed to the protonation effect of the tertiary amine groups in its structure under CO₂ acidic conditions.This study provides an important basis for plugging and profile control operations during CO₂ flooding.

Key words： CO₂ flooding; non-homogeneous reservoir; triple crosslinking; preformed particle gel; nano-crosslinking agent

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