| 摘要: |
| 以AM、AMPS和阳离子疏水单体MD-18为单体,采用水溶液自由基聚合法合成了疏水缔合聚合物压裂液稠化剂HAPAM-18。研究了HAPAM-18的增黏性能、与表面活性剂的相互作用以及压裂液体系的相关性能。结果 表明,HAPAM-18的表观黏度随质量浓度增加而增大,临界缔合浓度为0.15 g/L；HAPAM-18与表面活性剂的相互作用符合三阶段模型,且SDBS与HAPAM-18的相互作用强于CTAB；ρ(HAPAM-18)0.6 g/L + c(SDBS)0.5 mmol/L+ρ(KCl)2 g/L配制的压裂液体系的耐温性能达到101 ℃。耐剪切性实验和动态频率扫描表明,该压裂液体系具有良好的耐剪切性和黏弹性；过硫酸铵能使压裂液彻底破胶,破胶液残渣含量低至未检出,该压裂液是一种清洁压裂液。 |
| 关键词: 疏水缔合聚合物 稠化剂 表面活性剂 清洁压裂液 |
| DOI：10.3969/j.issn.1007-3426.2015.04.019 |
| 分类号:TE357.1+1 |
| 基金项目: |
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| Synthesis of a hydrophobically associating polymer thickening agent and evaluation of the fracturing fluid properties |
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He Kunyi, Luo Mina, Zhong Yao, Qin Ziwei
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(College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China)
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| Abstract: |
| A hydrophobically associating polymer thickening agent HAPAM-18 for fracturing fluid was synthesized by the aqueous solution free-radical copolymerization of AM, AMPS and a cationic hydrophobic monomer MD-18. The thickening ability and interactions with surfactant of HMPAM-18 were studied as well as the fracturing fluid properties. Result shows that the apparent viscosity of HAMPAM-18 solution increased with increasing concentration and its critical aggregation concentration is 0.15 g/L. The interactions between HAPAM-18 and surfactants fitted the three stage model and the interactions between HAPAM-18 and SDBS is more intensive than that with CTAB. The fracturing fluid system composed of 0.6 g/L HAPAM-18 + 0.5 mmol/L SDBS + 2 g/L KCl reached a temperature resistance of 101 ℃ and showed good shear resistance and viscoelasticity. The fracturing fluid system can be completely broken with unmeasurable insoluble residuals by ammonium persulfate as the gel-breaker which means this system can be taken as clean fracturing fluid. |
| Key words: hydrophobic associating polymer thickening agent surfactant clean fracturing fluid |
