摘要
采用红外和循环流变技术,研究了油藏温度下和SZ36-1油田现场水中,老化时间对机械剪切后的水溶性疏水缔合聚合物AP-P4结构及其亚浓溶液流变行为的影响,探讨了分子组成、构象变化对分子间缠结、交联等结构的作用,在分子水平研究了这种复杂流变体系的流变性质。实验结果表明,在65℃的油藏温度作用下,施加一定强度的剪切力场,AP-P4中疏水缔合结构的存在使其在发挥增稠作用时能够经受一定时间的考验,老化引起的水解程度的适度增加反而有利于聚合物的增黏性。
The ageing effect on the structure and semidilute rheological behaviours of the water-soluble hydrophobically associating polymer-AP-P4 after mechanical shearing in SZ36-1 oilfield is investigated by FTIR and circular rheological technologies at reservoir temperature.The influence of macromolecular composition and conformation on intermolecular entanglement and crosslinking are explored.Rheological property of the complex fluid is analyzed at the molecular level.The results show that after shearing,the thickening effect will rise up in a certain time at reservoir temperature,due to the hydrophobically associating structure.And the thickening property is enhanced by moderate increase of hydrolysis level caused by ageing effect.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第5期131-136,共6页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家高技术研究发展规划"863"项目(2007AA090701)
关键词
水溶性疏水缔合聚合物
热稳定性
循环流变
红外光谱
water-soluble hydrophobically associating polymer
thermal stability
cyclic rheology
infrared spectrum
