三元复合驱硅垢防垢剂SY-KD的合成及应用  

Synthesis and Application of Silicon Scale Inhibitor SY-KD Under the ASP Flooding System

作　　者：程杰成[1] 王庆国[1] 周万富[1] 李苏[2] 程铁欣[2] 周广栋[2] 

机构地区：[1]大庆油田有限责任公司,大庆163453 [2]吉林大学化学学院,长春130012

出　　处：《高等学校化学学报》2014年第2期332-337,共6页Chemical Journal of Chinese Universities

基　　金：大庆油田有限责任公司项目(批准号:DQYT-1204003-2012-JS-1165;2011-JS-471;2009-JS-1469;2008-JS-820)资助~~

摘　　要：通过分析三元复合驱油体系下硅垢的形成机理,设计合成了新型硅防垢剂SY-KD.SY-KD是由丙烯酸(AA)和对甲基烯丙基氧基苯磺酸(MBS)共聚形成的高分子(CAABS)与2-膦酸丁烷-1,2,4-三羧酸(PBTC)复配的混合物.SY-KD中羧基官能团通过氢键相互作用与原硅酸分子或其二聚体发生键合,由于SY-KD分子链的空间位阻效应,阻止了原硅酸分子或二聚体进一步聚合形成二氧化硅.室内研究结果表明,SY-KD各组分对于硅垢的阻垢能力主要是通过阻聚、吸附分散以及对不溶性SiO2的溶蚀作用来实现的,是一种很好的三元复合驱阻垢剂.SY-KD防垢剂使结垢油井平均检泵周期由50 d左右增加到300 d.By analyzing silica scale formation mechanism under the alkaline/surfactant/polymer（ ASP） floo-ding system, we designed and synthesized a new type of scale inhibitor SY-KD. SY-KD inhibitor is a complex mixture that made by the polymer（ CAABS） which is copolymerized by acrylic acid（ AA） and p-methyl allyl oxybenzene sulfonate（MBS） ＆2-phosphate-1,2,4-tricarboxylic acid（PBTC）. The carboxyl functional groups of SY-KD can link to the orthosilicic acid molecules or its dimer acid through hydrogen bonding interactions, since the molecular chain of SY-KD＇s steric effect would prevent further polymerization that the orthosilicic acid molecules or its dimer acid form silica dioxide. Laboratory experiments studies have shown that SY-KD is a good inhibitor for ASP flooding, each component of SY-KD can achieve the silicon scale inhibition ability mainly through the polymerization inhibition, the adsorption and dispersion, and the dissolution of insoluble SiO2 . Field tests have shown that SY-KD scale inhibitor delays the average pump detection period of scaled wells from about 50 d to 300 d.

关 键 词：三元复合驱 硅垢 防垢剂 

分 类 号：O647[理学—物理化学] O631[理学—化学]