LCST型温度敏感聚合物研究进展及其在钻井液领域的应用现状和前景

Research progress on LCST-type temperature-sensitive polymers and their current and prospective applications in drilling fluids

摘要:

LCST型温度敏感聚合物是一种在相转变温度前聚合物链呈现伸展溶解态,相转变温度后聚合物链为收缩聚集态的一类温度敏感聚合物。在环境温度变化刺激下的智能且可逆的响应,使LCST型温度敏感聚合物在有机化工、材料科学、生物医学和石油天然气工业等领域得到了深入的研究。通过对不同空间构象的LCST型温度敏感聚合物进行分类,介绍了线形结构、温敏水凝胶、嵌段结构、接枝复合结构和其它特殊结构的LCST型温度敏感聚合物的研究进展。结合不同空间构象的LCST型温度敏感聚合物的特点,系统介绍了LCST型温度敏感聚合物在低温流变调控、温敏智能封堵、增黏提切和防漏堵漏等钻井液领域的应用现状。对LCST型温度敏感聚合物在钻井液领域的应用现状进行了分析和总结,明确了LCST型温度敏感聚合物存在的关键问题,提出了LCST型温度敏感聚合物在钻井液领域的应用前景。关键词：温度敏感聚合物；钻井液；低温流变调控；智能封堵；增黏提切；防漏堵漏中图分类号：TQ630 文献标识码： A 文章编号：

Abstract:

LCST-type temperature-sensitive polymers are a class of temperature-sensitive polymers in which the polymer chains exhibit an extended solvation state before the phase transition temperature and a contracted aggregation state after the phase transition temperature. The intelligent and reversible response to the stimulation of ambient temperature change has led to the intensive study of LCST-type temperature-sensitive polymers in the fields of organic chemistry, materials science, biomedicine and oil and gas industry. By categorizing LCST-type temperature-sensitive polymers with different spatial conformations, the research progress of LCST-type temperature-sensitive polymers with linear structures, temperature-sensitive hydrogels, block structures, grafted composite structures, and other special structures is presented. Combined with the characteristics of LCST-type temperature-sensitive polymers with different spatial conformations, the current applications of LCST-type temperature-sensitive polymers in drilling fluids, such as low-temperature rheology control, temperature-sensitive intelligent plugging, viscosity enhancement and cutting, and leakage prevention and plugging, are systematically introduced. The application status of LCST-type temperature-sensitive polymers in drilling fluids is analyzed and summarized, the key problems of LCST-type temperature-sensitive polymers are clarified, and the application prospects of LCST-type temperature-sensitive polymers in drilling fluids are proposed.