纳米材料复合泡沫缓速酸协同增效作用的研究
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摘要
为了增加酸化压裂过程中酸液的刻蚀距离,增强作业效果,由纳米SiO_2和表面活性剂YEP-1和20%HCl制备了高效纳米泡沫缓速酸体系,研究纳米材料的表面性能、粒径等因素对表面活性剂在盐酸溶液中发泡性能的影响,测试了复合酸液体系的酸岩反应动力学参数和溶蚀速率。结果表明,采用粒径为20 nm的亲水型SiO_2纳米材料作为稳泡剂效果最佳,并使用两性表面活性剂YFP-1作为起泡剂,当SiO_2和YFP-1的质量分数分别为体系总质量0.5%和1.0%时,酸液起泡体积明显减小,泡沫更加致密,半衰期显著增大,复合酸液体系配比为20%HCl+1.0%YFP-1+0.5%SiO_2时,显著降低了岩芯动态溶蚀速率,为实现深部酸化提供了技术支持。
In order to increase the etching distance of acid in the process of acidizing fracturing and enhance the operation effect.The synergistic effect of nano-materials and surfactants in the acid system was studied,and the high efficiency nano-foam retarded acid system was prepared.Indoor surface properties of nanomaterials and particle size on the influence of surfactant in hydrochloric acid solution foaming performance was studied,and the acid rock reaction kinetics parameters were tested and compared,the characterization of nano materials and the dissolution rate of compound acid surfactant system.The results showed that the hydrophilic SiO_2 nano-materials with a particle size of 20 nm were the best for the stabilizer,and the self-made ampholytic surfactant YFP-1 was used as the foaming agent.Based on the total mass of the system,when the mass fraction of SiO_2 and YFP-1 was 0.5% and 1.0%respectively,the volume of the acid bubbly was significantly reduced,the foam was more dense,and the half-life was significantly increased.The ratio of the compound acid system was 20% HCl+1.0% YFP-1+0.5% SiO_2,which significantly reduced the dynamic corrosion rate of core and provided technical support for deep acidification.
In order to increase the etching distance of acid in the process of acidizing fracturing and enhance the operation effect.The synergistic effect of nano-materials and surfactants in the acid system was studied,and the high efficiency nano-foam retarded acid system was prepared.Indoor surface properties of nanomaterials and particle size on the influence of surfactant in hydrochloric acid solution foaming performance was studied,and the acid rock reaction kinetics parameters were tested and compared,the characterization of nano materials and the dissolution rate of compound acid surfactant system.The results showed that the hydrophilic SiO_2 nano-materials with a particle size of 20 nm were the best for the stabilizer,and the self-made ampholytic surfactant YFP-1 was used as the foaming agent.Based on the total mass of the system,when the mass fraction of SiO_2 and YFP-1 was 0.5% and 1.0%respectively,the volume of the acid bubbly was significantly reduced,the foam was more dense,and the half-life was significantly increased.The ratio of the compound acid system was 20% HCl+1.0% YFP-1+0.5% SiO_2,which significantly reduced the dynamic corrosion rate of core and provided technical support for deep acidification.
引文
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[14]Singh R,Mohanty K K.Synergy between nanoparticles and surfactants in stabilizing foams for oil recovery[J].Energy&Fuels,2015,29(2):467-479.
[15]闫永萍,马兵,杨晓刚,等.姬塬长8油藏泡沫酸酸化技术研究及应用[J].科学技术与工程,2014,14(9):175-179.
[2]王永辉,李永平,程兴生,等.高温深层碳酸盐岩储层酸化压裂改造技术[J].石油学报,2012,33(s2):166-173.
[3]魏慧慧,王健,王华.泡沫酸酸化技术简析及其在气井酸化中的应用[J].中国石油和化工标准与质量,2012,32(1):31.
[4]Singh R,Mohanty K K.Synergy between nanoparticles and surfactants in stabilizing foams for oil recovery[J].Energy&Fuels,2015,29(2):467-479.
[5]Carn F,Colin A,Pitois O,et al.Foam drainage in the presence of nanoparticle-surfactant mixtures[J].Langmuir,2009,25(14):7847-7856.
[6]Horozov T S.Foams and foam films stabilised by solid particles[J].Current Opinion in Colloid&Interface Science,2008,13(3):134-140.
[7]Sethumadhavan G N,Nikolov A D,Wasan D T.Stability of liquid films containing monodisperse colloidal particles[J].Journal of Colloid&Interface Science,2001,240(1):105-112.
[8]Sethumadhavan G,Nikolov A,Wasan D.Stability of films with nanoparticles[J].Journal of Colloid&Interface Science,2004,272(1):167-171.
[9]Dickinson E.Food emulsions and foams:Stabilization by particles[J].Current Opinion in Colloid&Interface Science,2010,15(1):40-49.
[10]何春明,陈红军,刘岚,等.VES自转向酸反应动力学研究[J].石油与天然气化工,2010,39(3):246-249.
[11]陈斌,赵雄虎,李外,等.纳米技术在钻井液中的应用进展[J].石油钻采工艺,2016,38(3):315-321.
[12]孙乾,李兆敏,李松岩,等.Si O2纳米颗粒稳定的泡沫体系驱油性能研究[J].中国石油大学学报:自然科学版,2014(4):124-131.
[13]陈维余,黄波,周济永,等.秦皇岛32-6油田强化氮气泡沫驱实验[J].大庆石油地质与开发,2011,30(5):139-143.
[14]Singh R,Mohanty K K.Synergy between nanoparticles and surfactants in stabilizing foams for oil recovery[J].Energy&Fuels,2015,29(2):467-479.
[15]闫永萍,马兵,杨晓刚,等.姬塬长8油藏泡沫酸酸化技术研究及应用[J].科学技术与工程,2014,14(9):175-179.