深圳大学学报理工版

将大单体4-乙烯苄基辛烷基酚聚氧乙烯(18)醚、丙烯酰胺和2-丙烯酰胺基-2-甲基丙磺酸钠共聚合成接枝丙烯酰胺共聚物(branched acrylamide-based copolymer, PAE),然后将具有表面活性的PAE分别与4种表面活性剂复合,获得二元复合驱油体系.研究各表面活性剂对这些二元复合驱油体系的表观黏度和表面张力的影响,与油田常用的部分水解聚丙烯酰胺-表面活性剂二元复合驱油体系相比,这些体系可提高驱油剂的增黏性和表面活性,改善驱油过程中的色谱分离效应.在阴离子表面活性剂(十二烷基硫酸钠和十二烷基苯磺酸钠(sodium dodecyl benzene sulfonate, SDBS)、阳离子表面活性剂(十六烷基三甲基溴化铵)和非离子表面活性剂(聚氧乙烯(20)山梨醇酐单硬脂酸酯)中,微量SDBS对聚合物体系溶液黏度提高幅度最大,且能明显降低体系的表面张力,当SDBS浓度为0.6 mmol/L时, PAE二元复合驱油体系(含5.0 g/L NaCl,1.2 g/L PAE)的表观黏度可从243 mPa·s上升到732 mPa·s.

We report the synthesis of the branched acrylamide-based copolymer(PAE)and acrylamide(AM), sodium 2-acrylamido-2-methylpropane sulphonate(NaAMPS)and a macro-monomer: p-vinylbenzyl-terminated octylphenoxy poly(ethylene oxide)(VE, polymerization number: 18). By blending the PAE polymer with four different kinds of surfactants, we obtain the binary combination oil displacement system. We investigate the effects of each kind of surfactants on apparent viscosity and surface tension of the compound flooding system. Compared with the flooding system containing surfactant and partially hydrolyzed polyacrylamide(HPAM)with super high molecular weight, which is frequently used in oil fields, these compound flooding systems have better thickening and surface properties and better chromatographic separation. Among the anionic surfactants: sodium dodecyl sulphate(SDS)and sodium dodecyl benzene sulfonate(SDBS), the cationic surfactant: cetyltrimethylammonium bromide(CTAB)and the non-ionic surfactant: polyoxyethylene soritan monostearate(TW- 60), the addition of small amounts of SDBS producesthe sharpest increase in solution viscosity and a sharp decline in surface tension. For example, for a binary compound flooding system containing 5.0 g/L NaCl and 1.2 g/L PAE, as the SDBS concentration is increased from zero to 0.6 mmol/L, the apparent viscosity increases from 243 mPa·s to 732 mPa·s.

引言
1 实验
2 结果与讨论
3 结论

图1 PAE的分子结构<br/>Fig.1 Molecular structure of PAE

图1 PAE的分子结构
Fig.1 Molecular structure of PAE

图2 聚合物质量浓度对溶液表观黏度的影响<br/>Fig.2 Effect of polymer concentration on the apparent viscosity of solution

图2 聚合物质量浓度对溶液表观黏度的影响
Fig.2 Effect of polymer concentration on the apparent viscosity of solution

图3 PAE溶液(ρ(PAE)=0.8 g/L,ρ(NaCl)=0 g/L)的扫描电镜照片<br/>Fig.3 SEM images of 0.8 g/L PAE in aqueous solution

图3 PAE溶液(ρ(PAE)=0.8 g/L,ρ(NaCl)=0 g/L)的扫描电镜照片
Fig.3 SEM images of 0.8 g/L PAE in aqueous solution

图4 ρ(PAE)对PAE溶液表面张力的影响<br/>Fig.4 Effect of ρ(PAE)on surface tensions of PAE solutions

图4 ρ(PAE)对PAE溶液表面张力的影响
Fig.4 Effect of ρ(PAE)on surface tensions of PAE solutions

图5 SDS浓度对PAE和HPAM(均含5.0 g/L NaCl和1.2 g/L HPAM)溶液表观黏度的影响<br/>Fig.5 Effect of SDS concentration on apparent viscosities of 1.2 g/L PAE and 1.2 g/L HPAM brine solutions with 5.0 g/L NaCl

图5 SDS浓度对PAE和HPAM(均含5.0 g/L NaCl和1.2 g/L HPAM)溶液表观黏度的影响
Fig.5 Effect of SDS concentration on apparent viscosities of 1.2 g/L PAE and 1.2 g/L HPAM brine solutions with 5.0 g/L NaCl

图6 聚合物质量浓度对PAE-SDS和HPAM-SDS体系(均含5.0 g/L NaCl和3 mmol/L SDS)表面张力的影响<br/>Fig.6 Effect of polymer concentration on surface tension of the PAE-SDS and HPAM-SDS solutions with 5.0 g/L NaCl and 3 mmol/L SDS

图6 聚合物质量浓度对PAE-SDS和HPAM-SDS体系(均含5.0 g/L NaCl和3 mmol/L SDS)表面张力的影响
Fig.6 Effect of polymer concentration on surface tension of the PAE-SDS and HPAM-SDS solutions with 5.0 g/L NaCl and 3 mmol/L SDS

图7 SDBS浓度对PAE二元复合体系( ρ(PAE)=1.2 g/L,ρ(NaCl)=5.0 g/L)表观黏度的影响<br/>Fig.7 Effect of SDBS concentration on the apparent viscosity of the 1.2 g/L PAE solution with 5.0 g/L NaCl

图7 SDBS浓度对PAE二元复合体系( ρ(PAE)=1.2 g/L,ρ(NaCl)=5.0 g/L)表观黏度的影响
Fig.7 Effect of SDBS concentration on the apparent viscosity of the 1.2 g/L PAE solution with 5.0 g/L NaCl

图8 ρ(PAE)对PAE-SDBS复合驱油体系(含5.0 g/L NaCl和0.6 mmol/L SDBS)表面张力的影响<br/>Fig.8 Effect of ρ(PAE)on surface tension of PAE-SDBS solution with 5.0 g/L NaCl and 0.6 mmol/L SDBS

图8 ρ(PAE)对PAE-SDBS复合驱油体系(含5.0 g/L NaCl和0.6 mmol/L SDBS)表面张力的影响
Fig.8 Effect of ρ(PAE)on surface tension of PAE-SDBS solution with 5.0 g/L NaCl and 0.6 mmol/L SDBS

图9 CTAB浓度对PAE溶液(ρ(PAE)=1.2 g/L,ρ(NaCl)=5.0 g/L)表观黏度的影响<br/>Fig.9 Effect of CTAB concentration on the apparent viscosity of 1.2 g/L PAE solution with 5.0 g/L NaCl

图9 CTAB浓度对PAE溶液(ρ(PAE)=1.2 g/L,ρ(NaCl)=5.0 g/L)表观黏度的影响
Fig.9 Effect of CTAB concentration on the apparent viscosity of 1.2 g/L PAE solution with 5.0 g/L NaCl

图10 ρ(PAE)对PAE-CTAB复合驱油体系(含5.0 g/L NaCl和0.2 mmol/L CTAB)表面张力的影响<br/>Fig.10 Effect of ρ(PAE)on the surface tension of the PAE-CTAB solution with 5.0 g/L NaCl and 0.2 mmol/L CTAB

图10 ρ(PAE)对PAE-CTAB复合驱油体系(含5.0 g/L NaCl和0.2 mmol/L CTAB)表面张力的影响
Fig.10 Effect of ρ(PAE)on the surface tension of the PAE-CTAB solution with 5.0 g/L NaCl and 0.2 mmol/L CTAB

图11 TW- 60浓度对PAE二元复合体系(ρ(PAE)=1.2 g/L,ρ(NaCl)=5.0 g/L)表观黏度的影响<br/>Fig.11 Effect of TW- 60 concentration on the apparent viscosity of the 1.2 g/L PAE solution with 5.0 g/L NaCl

图11 TW- 60浓度对PAE二元复合体系(ρ(PAE)=1.2 g/L,ρ(NaCl)=5.0 g/L)表观黏度的影响
Fig.11 Effect of TW- 60 concentration on the apparent viscosity of the 1.2 g/L PAE solution with 5.0 g/L NaCl

图12 聚合物质量浓度对PAE-TW- 60复合体系(含5.0 g/L NaCl和0.3 mmol/L TW- 60)表面张力的影响<br/>Fig.12 Variation of surface tension with polymer concentration for the PAE-TW- 60 solution with 5.0 g/L NaCl and 0.3 mmol/L TW- 60

图12 聚合物质量浓度对PAE-TW- 60复合体系(含5.0 g/L NaCl和0.3 mmol/L TW- 60)表面张力的影响
Fig.12 Variation of surface tension with polymer concentration for the PAE-TW- 60 solution with 5.0 g/L NaCl and 0.3 mmol/L TW- 60

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备注

引言

1 实验

2 结果与讨论

3 结论

期刊信息

备注

引言

1 实 验

2 结果与讨论

3 结 论

期刊信息

1 实验

3 结论