完井液用小阳离子聚合物的合成与评价  

Synthesis and evaluation of the small cation polymer used in completion fluid

作　　者：罗云[1] 刘义坤[1] 范振中[1] 毕永斌[1] 田建龙[2] 

机构地区：[1]大庆石油学院提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]大庆油田技术培训中心,黑龙江大庆163255

出　　处：《大庆石油学院学报》2008年第1期101-103,115,共4页Journal of Daqing Petroleum Institute

摘　　要：利用提纯的阳离子单体二甲基二烯丙基氯化铵、复合引发体系,与丙烯酰胺单体进行聚合.当加入引发剂的质量分数为0.1%,DM与AM的物质的量比为1:5时,可以合成特性黏数大于140mL.g-1的小阳离子聚合物,且共聚反应易于控制.表面活性剂的加入不影响聚合物的特性黏数,但聚合物的溶解性能提高较大.静态膨胀实验表明:小阳离子聚合物与PTA复配,PTA的质量分数为1.0%;小阳离子聚合物的质量分数为0.5%～1.0%时,黏土基本不膨胀.由于阳离子聚合物正电荷密度高,通过静电作用吸附在黏土颗粒的表面上,减少了黏土颗粒的水化、膨胀.Using the pure cation monomer dimethyldiallylammonium chloride and mixing initiator,the copolymer was prepared with acrylamide.When the mass ratio of initiator is 0.1% and the molar ratio of DM to AM is 1:5,it can synthesize the cation polymer whose characteristic viscosity [η] is greater than 140 mL·g-1.The copolymerization is controlled easily.The additive of surfactant does not affect the characteristic viscosity of polymer,but it can improve the dissolution of polymer.The static swelling test show that the clay did not swell when the small cation polymer is mixed with PTA,the mass ratio of PTA and small cation polymer is 1.0% and 0.5%~1.0%,respectively.Because the cation polymer has the high density of positive charge,it can adsorb on the clay particle's surface and decrease the hydration and swelling of clay particles.

关 键 词：阳离子聚合物 丙烯酰胺 二甲基二烯丙基氯化铵 静态膨胀率 特性黏数 完井液 

分 类 号：TE252[石油与天然气工程—油气井工程]