三元复合驱硅垢防垢剂SY-KD的合成及应用

doi:10.7503/cjcu20130894

高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (2): 332.doi: 10.7503/cjcu20130894

三元复合驱硅垢防垢剂SY-KD的合成及应用

程杰成¹(), 王庆国¹, 周万富¹, 李苏², 程铁欣², 周广栋²

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

收稿日期:2013-09-11 出版日期:2014-02-10 发布日期:2013-12-30
作者简介:联系人简介: 程杰成, 男, 博士, 教授级高级工程师, 主要从事三次采油方面的研究. E-mail:chengjiecheng@petrochina.com.cn
基金资助:
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

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

CHENG Jiecheng^1,^*(), WANG Qingguo¹, ZHOU Wanfu¹, LI Su², CHENG Tiexin², ZHOU Guangdong²

1. Daqing Oilfield Co. Ltd., Daqing 163453, China
2. College of Chemistry, Jilin University, Changchun 130012, China

Received:2013-09-11 Online:2014-02-10 Published:2013-12-30
Contact: CHENG Jiecheng E-mail:chengjiecheng@petrochina.com.cn

摘要/Abstract

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.

关键词: 三元复合驱, 硅垢, 防垢剂

Abstract:

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.

Key words: Alkaline/surfactant/polymer(ASP), Silicon scale, Scale inhibitor

中图分类号:

O647
O631

TrendMD:

程杰成, 王庆国, 周万富, 李苏, 程铁欣, 周广栋. 三元复合驱硅垢防垢剂SY-KD的合成及应用. 高等学校化学学报, 2014, 35(2): 332.

CHENG Jiecheng, WANG Qingguo, ZHOU Wanfu, LI Su, CHENG Tiexin, ZHOU Guangdong. Synthesis and Application of Silicon Scale Inhibitor SY-KD Under the ASP Flooding System^†. Chem. J. Chinese Universities, 2014, 35(2): 332.

图/表 11

Fig.1 Data of silicon content changes with time in ASP aqueous soaked rockThe rocks were taken from the wells: a. South 5-21-P34; b. North 1-55-E66.

Fig.2 Data of silicon ions changes during ASP aqueous driving corea. Central sampling; b. bottom sampling.

Fig.3 IR spectrum of CAABS

Fig.4 Renderings of CAABS static resistance SiO2 scaleConcentration of CAABS/(mg·L-1): a. 0; b. 50; c. 100; d. 200.

Fig.5 Schematic diagram of interaction between CAABS and silicic acid dimer

Fig.6 IR spectra of SY-KD and Na2SiO3 system a. CAABS+Na2SiO3; b. CAABS.

Fig.7 IR spectra of CAABS and insoluble SiO2 mixed systemsa. CAABS; b. SiO2+CAABS; c. SiO2.

Fig.8 Dissolved silicon content of various amounts of PBTCConcentration of PBTC/(mg·L-1): a. 0; b. 200; c. 2500; d. 5000; e. 7500; f. 10000.

Fig.9 Results of SY-KD and conventional inhibitor resistance to silicaa—d. Concentration of SY-KD are 0, 50, 100, 200 mg/L; e. concentration of HEDP is 200 mg/L; f. concentration of PBTC is 200 mg/L.

Fig.10 Fouling of plus(A) and unregulated(B) scale inhibitor screens in La 9-AS2711 wells

Fig.11 SEM image(A) and EDAX pattern(B) of the scaled sample in La 9-AS2711 well

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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^†

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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†

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