不同结构驱油聚合物的界面剪切流变性质

doi:10.7503/cjcu20131241

高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (4): 791.doi: 10.7503/cjcu20131241

不同结构驱油聚合物的界面剪切流变性质

李静^1,², 杨勇³, 曹绪龙³, 张继超³, 张磊¹(), 张路¹(), 赵濉¹

1. 中国科学院理化技术研究所, 北京 100190
2. 中国科学院大学, 北京 100049
3. 中国石化胜利油田分公司地质科学研究院, 东营 257015

收稿日期:2013-12-18 出版日期:2014-04-10 发布日期:2014-02-25
作者简介:联系人简介: 张路, 男, 博士, 副研究员, 主要从事胶体与界面科学研究. E-mail: luyiqiao@hotmail.com;张磊, 女, 博士, 副研究员, 主要从事胶体与界面科学研究. E-mail: zl2558@163.com
基金资助:
国家科技重大专项项目(批准号: 2011ZX05011-004)和国家自然科学基金(批准号: 51373192)资助

Interfacial Shear Rheological Properties of Enhanced Oil Recovery Polymers with Different Structures^†

LI Jing^1,², YANG Yong³, CAO Xulong³, ZHANG Jichao³, ZHANG Lei^1,^*(), ZHANG Lu^1,^*(), ZHAO Sui¹

1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Geological and Scientific Research Institute of Shengli Oilfield Co.Ltd., SINOPEC, Dongying 257015, China.

Received:2013-12-18 Online:2014-04-10 Published:2014-02-25
Contact: ZHANG Lei,ZHANG Lu E-mail:zl2558@163.com;luyiqiao@hotmail.com
Supported by:
† Supported by the Important National Science & Technology Specific Projects, China(No.2011ZX05011-004) and the National Science Foundation of China(No.51373192)

摘要/Abstract

摘要：

利用双锥法研究了油田现场用超高分子量部分水解聚丙烯酰胺(PHPAM)和疏水改性聚丙烯酰胺(HMPAM)溶液与航空煤油间的界面剪切流变性质, 考察了时间、应变幅度和剪切频率对不同浓度PHPAM和HMPAM溶液界面剪切流变参数的影响. 结果表明, 只有在适宜的剪切频率条件下, 流变数据才能反映界面膜的结构信息. HMPAM分子具有界面活性, 能吸附在界面上, 其界面膜的强度随时间变化逐渐增强, 且在高浓度时以黏性为主; PHPAM分子不具有界面活性, 其剪切流变参数没有时间依赖性, 界面层以弹性为主. HMPAM能通过疏水作用形成界面网络结构, 界面膜的剪切复合模量明显高于PHPAM界面层. HMPAM界面层中网络结构在剪切形变作用下的破坏与重组这一慢弛豫过程是其强度较高的原因.

关键词: 部分水解聚丙烯酰胺, 疏水改性聚丙烯酰胺, 界面, 剪切流变, 煤油

Abstract:

The interfacial shear rheological properties of ultra-high molecular weight partialhydrolysis polyacrylamide(PHPAM) and hydrophobically modified polyacrylamide(HMPAM) for enhanced oil recovery(EOR) were studied by biconical method at kerosene-water interfaces. The effects of time, strain amplitude and shear frequency on interfacial shear rheological data of different concentration PHPAM and HMPAM solutions were investigated. The experimental results show that the information for structure of interfacial film can be detected only under optimum shear frequency range. HMPAM molecules have interfacial activity and can adsorb onto the interface, which result in the enhancement of strength of interfacial film with aging time and the viscous nature at higher concentration. PHPAM shows no interfacial activity, which leads to time independence of shear rheological data and the elastic property of film. The interfacial shear complex moduli of HMPPAM are obviously higher than those of PHPAM because the interfacial net structure can be formed by HMPAM molecules through hydrophobic interaction. The experimental results of relaxation method show that the slow relaxation process related to destroy and restructure of interfacial net structure under shear deformation is responsible for the higher strength of HMPAM film.

Key words: Partial hydrolysis polyacrylamide, Hydrophobically modified polyacrylamide, Interface, Shear rheology, Kerosene

中图分类号:

O647

TrendMD:

李静, 杨勇, 曹绪龙, 张继超, 张磊, 张路, 赵濉. 不同结构驱油聚合物的界面剪切流变性质. 高等学校化学学报, 2014, 35(4): 791.

LI Jing, YANG Yong, CAO Xulong, ZHANG Jichao, ZHANG Lei, ZHANG Lu, ZHAO Sui. Interfacial Shear Rheological Properties of Enhanced Oil Recovery Polymers with Different Structures^†. Chem. J. Chinese Universities, 2014, 35(4): 791.

图/表 11

Fig.1 Schematic diagram of interfacial shear rheometer based on bicone geometry

Fig.2 Effect of strain on the bulk(A) and interface-bulk(B) shear complex moduli for different concentrations of HMPAM solutions Concentration of HMPAM/(mg·L-1): ■ 500; □ 1000; ▲ 2000; △ 3000. Frequency: 0.03 Hz. (B) oil: kerosene aqueous; aqueous: HMPAM.

Fig.3 Effect of strain on the bulk(A) and interface-bulk(B) shear complex moduli for different concentrations of PHPAM solutions Concentration of PHPAM/(mg·L-1): ■ 100; □ 1000; ▲ 2000; △ 3000. Frequency: 0.03 Hz. (B) oil: kerosene aqueous; aqueous: PHPAM.

Fig.4 Dynamic interfacial shear elastic(A) and viscous moduli(B) for different concentrations of HMPAMConcentration of HMPAM in the interface of kerosene-HMPAM/(mg·L-1): ■ 500; □ 1000; ▲ 2000; △ 3000. Frequency: 0.03 Hz.

Fig.5 Dynamic interfacial shear elastic(A) and viscous moduli(B) for different concentrations of PHPAMConcentration of PHPAM in the interface of kerosene-PHPAM/(mg·L-1): ■ 100; □ 1000; ▲ 2000; △ 3000. Frequency: 0.1 Hz.

Fig.6 Effect of frequency on interfacial shear complex moduli for different concentrations of HMPAM Concentration of HMPAM in the interface of kerosene-HMPAM/(mg·L-1): ■ 500; □ 1000; ▲ 2000; △ 3000.

Fig.7 Effect of frequency on interfacial shear complex moduli for different concentrations of PHPAMConcentration of PHPAM in the interface of kerosene-HMPAM/(mg·L-1): ■ 100; □ 1000; ▲ 2000; △ 3000.

Fig.8 Comparison of interfacial shear complex moduli of polymers HMPAM(a) and PHPAM(b)Frequency: 0.1 Hz.

Fig.9 Effect of frequency on the interfacial shear elastic and viscous moduli of HMPAM(A) and PHPAM(B) (A) Concentration of HMPAM in the interface of kerosene-HMPAM/(mg·L-1): ■, □ 500; ▲, △ 1000; ▼, ▽ 2000; ★, ☆ 3000. (B) Concentration of PHPAM in the interface of kerosene-PHPAM/(mg·L-1): ■, □ 100; ▲, △ 1000; ▼, ▽ 2000; ★, ☆ 3000.

Fig.10 Decay curves of shear stress for different concentrations of HMPAM(A) and PHPAM(B) solutions Oil; kerosene; *train. (A) Concentration of HMPAM/(mg·L-1): ■ 500; □ 1000; ▲ 2000; △ 3000. (B) Concentration of PHPAM/(mg·L-1): ■ 1000; □ 2000; ▲ 3000.

Table 1 Characteristic parameters of interfacial relaxation for EOR polymers with different structures

EOR polymer	Concentration/ (mg·L^-1)	Δτ₁/ (mN·m^-1)	T₁/s	Δτ₂/ (mN·m^-1)	T₂/s	Δτ₃/ (mN·m^-1)	T₃/s	Δτ/ (mN·m^-1)
HMPAM	2000	0.12	1.8	0.14	13.5	0.06	90.9	0.32
	3000	0.54	3.6	0.42	25.6	0.17	181.8	1.13
PHPAM	2000	0.01	0.3	0.02	1.1			0.03
	3000	0.12	0.7	0.04	4.2			0.16

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不同结构驱油聚合物的界面剪切流变性质

Interfacial Shear Rheological Properties of Enhanced Oil Recovery Polymers with Different Structures^†

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不同结构驱油聚合物的界面剪切流变性质

Interfacial Shear Rheological Properties of Enhanced Oil Recovery Polymers with Different Structures†

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Interfacial Shear Rheological Properties of Enhanced Oil Recovery Polymers with Different Structures^†