耐温型聚丙烯酰胺减阻剂研究与应用现状

Research and application status of temperature resistance polyacrylamide drag reducers

滑溜水压裂是页岩气储层开发的主要技术手段之一,聚丙烯酰胺(PAM)减阻剂是滑溜水压裂液的核心添加剂,我国深层页岩气资源丰富,储层温度高,PAM易发生热氧降解而性能下降。回顾了聚合物减阻剂的发展历程,明确了温度对PAM减阻剂分子稳定性的影响机理,概述了三种耐温型PAM减阻剂的研究方法,综述了耐温型PAM减阻剂的合成方法及其在深层页岩气井压裂改造中的应用进展,为深层油气储层耐高温压裂液的研究及应用提供了理论依据。

Slick water fracturing is one of the main technical means of economic development for shale gas reservoirs,and polyacrylamide(PAM) drag reducer is the primary additive of slick water fracturing fluid. China has an abundance of deep shale gas resources,and the reservoirs are generally high temperature. PAM is susceptible to thermal degradation which leads to performance degradation.The development history of polymer drag reducers and the mechanism of temperature influence on the molecular stability of PAM drag reducers are reviewed. Then,three molecular design methods of temperature resistance PAM drag reducers were reviewed. Finally,the synthesis method of temperature resistance PAM drag reducer and its application in the fracturing deep shale gas wells are described. This paper aims to provide theoretical basis for the research of high temperature resistant fracturing fluids suitable for the development of deep oil and gas reservoirs.