阳离子微球与部分水解聚丙烯酰胺的絮凝作用

doi:10.7623/syxb201306016

石油学报 ›› 2013, Vol. 34 ›› Issue (6): 1157-1162.DOI: 10.7623/syxb201306016

阳离子微球与部分水解聚丙烯酰胺的絮凝作用

李光辉, 张贵才, 葛际江, 周帅, 刘月亮

中国石油大学石油工程学院山东青岛 266580

收稿日期:2013-04-26 修回日期:2013-07-20 出版日期:2013-11-25 发布日期:2013-10-13
通讯作者: 张贵才，男，1966年3月生，1988年毕业于华东石油学院，现为中国石油大学（华东）教授、博士生导师，主要从事油田化学与提高采收率研究。Email：13706368080@vip.163.com
作者简介:李光辉，男，1982年8月生，2004年毕业于石油大学（华东），现为中国石油大学（华东）博士研究生，主要从事油田化学与提高采收率研究。Email：Jakielgh@163.com
基金资助:
国家自然科学基金青年科学基金项目（No.51104170）资助。

Coagulation effect of cationic microspheres with residual hydrolyzed polyacrylamide

LI Guanghui, ZHANG Guicai, GE Jijiang, ZHOU Shuai, LIU Yueliang

School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China

Received:2013-04-26 Revised:2013-07-20 Online:2013-11-25 Published:2013-10-13

摘要/Abstract

摘要：

应用反相微乳液聚合制成了不同阳离子度聚丙烯酰胺微球（MPAM），通过黏度、浊度、Zeta电势分析，研究了微球阳离子度、电解质浓度（C_E）对MPAM-HPAM复合体系聚沉规律的影响。实验结果表明，在临界聚沉盐浓度（C_csc）时，复合体系由絮凝相转变为均匀分散体系，且C_csc随着微球阳离子度增大而增加。当C_E< C_csc时，体系絮凝量随着C_E增加而增大，随着HPAM剂量增加先增大后减小，在电中和点附近，絮凝量达最大，这一趋势与体系中微球Zeta电势变化相对应；当C_E≥C_csc时，微球对分子量为1 400×10⁴的HPAM形成拟交联，可大幅提高体系黏度；这种均匀分散体系在蒸馏水稀释后，还能再次絮凝。

关键词: 阳离子微球, HPAM再利用, 聚合物驱, 提高采收率, 临界聚沉盐浓度

Abstract:

Polyacrylamide microspheres with different cationic degrees was synthesized using inversed microemulsion and effects of cationic degrees and electrolyte concentrations of microspheres on coagulation laws of a polyacrylamide microspheres and hydrolyzed polyacrylamide composite system was examined by means of viscometry, turbidimetry and the Zeta potential analysis. The experimental results show that the composite system evolves from a coagulation phase to a well-dispersed system at the critical coagulation salt content, which increases with the increase of cationic degrees of microspheres. When an electrolyte concentration is greater than a critical coagulation salt content, the coagulation volume of the system increases with the increase of electrolyte concentrations, moreover, it increases firstly then decreases with increasing the dose of hydrolyzed polyacrylamide. The coagulation volume of the system reaches to a maximum at the neutralization point of electron charge, which agrees well with the Zeta potential trend of microspheres of the system. When an electrolyte concentration is much greater than a critical coagulation salt content, the system viscosity of hydrolyzed polyacrylamide (14 million Dalton) increases strikingly due to a pseudo-crosslinking effect, but that of hydrolyzed polyacrylamide sharply drops down; especially when this evenly dispersed system is diluted with distilled water, coagulation can occur again.

Key words: cationic microspheres, hydrolyzed polyacrylamide reutilization, polymer flooding, enhanced oil recovery, critical coagulation salt content

中图分类号:

TE357.4

李光辉, 张贵才, 葛际江, 周帅, 刘月亮. 阳离子微球与部分水解聚丙烯酰胺的絮凝作用[J]. 石油学报, 2013, 34(6): 1157-1162.

LI Guanghui, ZHANG Guicai, GE Jijiang, ZHOU Shuai, LIU Yueliang. Coagulation effect of cationic microspheres with residual hydrolyzed polyacrylamide[J]. ACTA PETROLEI SINICA, 2013, 34(6): 1157-1162.

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阳离子微球与部分水解聚丙烯酰胺的絮凝作用

Coagulation effect of cationic microspheres with residual hydrolyzed polyacrylamide

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