硅烷偶联剂改性橡胶粉对固井水泥浆性能的影响
|
摘要
橡胶粉表面亲水性差,直接应用于油井水泥中使用效果差。采用硅烷偶联剂对橡胶粉进行改性处理,研究了不同硅烷偶联剂改性橡胶粉的表面基团变化,并评价了不同硅烷偶联剂改性橡胶粉在油井水泥浆中的使用效果。同时,研究了改性橡胶粉对固井水泥浆性能的影响,并对橡胶粉水泥石微观形貌进行观察。结果表明,使用硅烷偶联剂KH570对橡胶粉改性效果最好。掺入改性橡胶粉后,对水泥浆流变性有一定的影响,对水泥浆稠化时间影响较高,同时降低了水泥浆的失水量。与未掺橡胶粉水泥浆相比,随着橡胶粉加量增多,抗压强度下降,抗折强度和抗冲击强度先增大后减小。当橡胶粉掺量为2%时,抗压强度下降5.1%,而水泥石抗折强度和抗冲击强度分别提高15.5%和10.8%。含有6%橡胶粉水泥石的弹性模量比无橡胶粉水泥石下降48%。微观形貌表明橡胶粉颗粒较好的填充在水泥石内部,这有利于提高水泥石抵抗外部载荷作用的能力。
The surface hydrophilicity of rubber powder is poor, so its application effect in oil well cement is not good.In this paper, rubber powder was modified by silane coupling agent. The surface group changes of rubber powder modified by different silane coupling agent were studied, and the application effect of modified rubber powder in oil well cement slurry was evaluated. At the same time, the effect of modified rubber powder on the performance of cement slurry was studied, and the micro-morphology of rubber powder cement paste was observed. The results showed that the silane coupling agent KH570 had the best modification effect on rubber powder. After adding modified rubber powder, the rheological properties of cement slurry were affected to a certain extent, and the thickening time of cement slurry was greatly affected. At the same time, the water loss of cement slurry was reduced. Compared with the cement slurry without rubber powder, the compressive strength decreased, the flexural strength and impact strength first increased and then decreased with the increase of modified rubber powder. When the content of modified rubber powder was 2%, the compressive strength decreased by 5.1%, while the flexural strength and impact strength of cement paste increased by 15.5% and 10.8%, respectively. The elastic modulus of cement paste containing 6% modified rubber powder was 48% lower than that of cement paste without rubber powder. Microscopic morphology showed that modified rubber powder particles were better filled in the cement paste, which was conducive to improving the resistance of cement paste to external loads.
The surface hydrophilicity of rubber powder is poor, so its application effect in oil well cement is not good.In this paper, rubber powder was modified by silane coupling agent. The surface group changes of rubber powder modified by different silane coupling agent were studied, and the application effect of modified rubber powder in oil well cement slurry was evaluated. At the same time, the effect of modified rubber powder on the performance of cement slurry was studied, and the micro-morphology of rubber powder cement paste was observed. The results showed that the silane coupling agent KH570 had the best modification effect on rubber powder. After adding modified rubber powder, the rheological properties of cement slurry were affected to a certain extent, and the thickening time of cement slurry was greatly affected. At the same time, the water loss of cement slurry was reduced. Compared with the cement slurry without rubber powder, the compressive strength decreased, the flexural strength and impact strength first increased and then decreased with the increase of modified rubber powder. When the content of modified rubber powder was 2%, the compressive strength decreased by 5.1%, while the flexural strength and impact strength of cement paste increased by 15.5% and 10.8%, respectively. The elastic modulus of cement paste containing 6% modified rubber powder was 48% lower than that of cement paste without rubber powder. Microscopic morphology showed that modified rubber powder particles were better filled in the cement paste, which was conducive to improving the resistance of cement paste to external loads.
引文
[1]华苏东,姚晓.油井水泥石脆性降低的途径及其作用机理[J].中国石油大学学报:自然科学版,2007,31(1):108-113.
[2]李明,杨雨佳,郭小阳.碳纤维增强油井水泥石的力学性能[J].复合材料学报,2015,32(3):782-788.
[3]李早元,郭小阳.橡胶粉对油井水泥石力学性能的影响[J].石油钻探技术,2008,36(6):52-55.
[4]X.Cheng,H.Chen,H.Sheng,et al.Improvement of the properties of plasma-modified ground tire rubber‐filled cement paste[J].Journal of Applied Polymer Science,2012,126(6):1837-1843.
[5]龙丹,程小伟,时宇,等.微细橡胶粉对油井水泥基复合材料性能的影响[J].硅酸盐通报,2015,34(9):2629-2633.
[6]刘仍光,周仕明,陶谦,等.掺橡胶乳液和弹性粒子柔性油井水泥石的微结构[J].硅酸盐学报,2015,43(10):1475-1482.
[7]K.Agapiou,C.R.Gamwell,T.S.Sodhi.Influence of recycled rubber tire morphology on the mechanical properties of well cements[C].ARMA 16-321,2016.
[8]E.Kalkornsurapranee,N.Vennemann,C.Kummerlowe,et al.Novel thermoplastic natural rubber based on thermoplastic polyurethane blends:influence of modified natural rubbers on properties of the blends[J].Iranian Polymer Journal,2012,21(10):689-700.
[9]毋伟,贾梦秋,陈建峰,等.硅烷偶联剂对溶胶凝胶法纳米二氧化硅复合材料制备及应用的影响[J].复合材料学报,2004,21(2):70-75.
[10]张国岑,徐宍殷,袁群,等.改性剂对橡胶混凝土的作用机理研究[J].水利与建筑工程学报,2015(4):115-120.
[11]李波,邵鲁华,韩立国,等.固井用水泥外加剂研究进展[J].当代化工,2014,43(05),863-866.
[12]史素青,李明,魏福庆.一种抗温耐盐油井水泥降失水剂SW-1的研究[J].当代化工,2018,47(05),965-967+1100.
[13]于斌,丹美涵,姜经帅,等.抗温敏大温差聚合物缓凝剂的合成与应用[J].钻井液与完井液,2017,34(3):85-88.
[14]姚晓,许仲梓.低温下油井水泥石孔结构与抗压强度的关系[J].南京工业大学学报(自科版),2004,26(1):1-4.
[15]汪汉花,高莉莉.固井水泥石力学性能研究现状浅析[J].西部探矿工程,2010,22(4):70-74.
[16]宋建建,许明标,周俊,等.针状硅灰石微粉改善固井水泥浆性能研究[J].硅酸盐通报,2018,37(08):2656-2661.
[2]李明,杨雨佳,郭小阳.碳纤维增强油井水泥石的力学性能[J].复合材料学报,2015,32(3):782-788.
[3]李早元,郭小阳.橡胶粉对油井水泥石力学性能的影响[J].石油钻探技术,2008,36(6):52-55.
[4]X.Cheng,H.Chen,H.Sheng,et al.Improvement of the properties of plasma-modified ground tire rubber‐filled cement paste[J].Journal of Applied Polymer Science,2012,126(6):1837-1843.
[5]龙丹,程小伟,时宇,等.微细橡胶粉对油井水泥基复合材料性能的影响[J].硅酸盐通报,2015,34(9):2629-2633.
[6]刘仍光,周仕明,陶谦,等.掺橡胶乳液和弹性粒子柔性油井水泥石的微结构[J].硅酸盐学报,2015,43(10):1475-1482.
[7]K.Agapiou,C.R.Gamwell,T.S.Sodhi.Influence of recycled rubber tire morphology on the mechanical properties of well cements[C].ARMA 16-321,2016.
[8]E.Kalkornsurapranee,N.Vennemann,C.Kummerlowe,et al.Novel thermoplastic natural rubber based on thermoplastic polyurethane blends:influence of modified natural rubbers on properties of the blends[J].Iranian Polymer Journal,2012,21(10):689-700.
[9]毋伟,贾梦秋,陈建峰,等.硅烷偶联剂对溶胶凝胶法纳米二氧化硅复合材料制备及应用的影响[J].复合材料学报,2004,21(2):70-75.
[10]张国岑,徐宍殷,袁群,等.改性剂对橡胶混凝土的作用机理研究[J].水利与建筑工程学报,2015(4):115-120.
[11]李波,邵鲁华,韩立国,等.固井用水泥外加剂研究进展[J].当代化工,2014,43(05),863-866.
[12]史素青,李明,魏福庆.一种抗温耐盐油井水泥降失水剂SW-1的研究[J].当代化工,2018,47(05),965-967+1100.
[13]于斌,丹美涵,姜经帅,等.抗温敏大温差聚合物缓凝剂的合成与应用[J].钻井液与完井液,2017,34(3):85-88.
[14]姚晓,许仲梓.低温下油井水泥石孔结构与抗压强度的关系[J].南京工业大学学报(自科版),2004,26(1):1-4.
[15]汪汉花,高莉莉.固井水泥石力学性能研究现状浅析[J].西部探矿工程,2010,22(4):70-74.
[16]宋建建,许明标,周俊,等.针状硅灰石微粉改善固井水泥浆性能研究[J].硅酸盐通报,2018,37(08):2656-2661.