Study of Nanoparticle-Surfactant-Stabilized Foam as a Fracturing Fluid
Study of Nanoparticle-Surfactant-Stabilized Foam as a Fracturing Fluid
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DOI：
10.1021/acs.iecr.5b02197
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发表时间：
2015-09-30
影响因子：
4.2
通讯作者：
Sun, Qian
中科院分区：
文献类型：
--
作者：
Lv, Qichao;Li, Zhaomin;Sun, Qian
近年来，水力压裂技术的发展对高性能、低地层损伤的压裂液产生了巨大的需求。本文研究了部分疏水性改性SiO2纳米颗粒和十二烷基苯磺酸钠（SDBS）作为压裂液稳定泡沫的方法。研究了SiO2/SDBS泡沫的流变性、支撑剂悬浮、过滤和岩心损伤等性能。实验数据表明，纳米二氧化硅（SiO2）的加入提高了十二烷基苯磺酸钠（SDBS）泡沫的稳定性和热适应性。添加SiO2纳米颗粒后，SDBS分散体的表面张力几乎没有变化；但界面的膨胀粘弹性增大，说明SiO2纳米颗粒附着在界面上，形成了更强的粘弹性层，以抵抗外界干扰。支撑剂在SiO2/SDBS泡沫中的沉降速度比在纯SDBS泡沫中的沉降速度低2个数量级。结果表明，SiO2/SDBS泡沫的总泄漏系数低于SDBS泡沫。虽然SiO2/SDBS泡沫的岩心损伤比略大于SDBS泡沫，但与GEL/SDBS相比，SiO2/SDBS泡沫的岩心损伤仍处于较低水平。SiO2纳米颗粒表面活性剂稳定泡沫优于表面活性剂稳定泡沫，并且比凝胶表面活性剂稳定泡沫造成的岩心渗透率损害更小。推荐用于水力压裂，特别是致密气藏和页岩气藏的压裂增产。
The development of hydraulic fracturing has created a huge demand for fracturing fluids with high performance and low formation damage in recent years. In this paper, a foam stabilized by partially hydrophobic modified SiO2 nanopartides and sodium dodecyl benzenesulfonate (SDBS) was studied as a fracturing fluid. The properties of SiO2/SDBS foam such as rheology, proppant suspension, filtration, and core damage were investigated. The experimental data showed that the stability and thermal adaptability of sodium dodecyl benzenesulfonate (SDBS) foam increased when silica (SiO2) nanopartides were added. The surface tension of SDBS dispersion almost did not change after SiO2 nanopartides were added; however, the dilational viscoelasticity of the interface increased, indicating that the SiO2 nanopartides attached to the interface and formed a stronger viscoelasticity layer to resist the external disturbance. The proppant settling velocity in the SiO2/SDBS foam was found to be 2 orders of magnitude lower than that in a pure SDBS foam. The total leakoff coefficient of the SiO2/SDBS foam was found to be lower than that of an SDBS foam. Although the core damage ratio of the SiO2/SDBS foam was slightly larger than that of an SDBS foam, compared to GEL/SDBS, the core damage caused by the SiO2/SDBS foam remained at a low level. SiO2 nanoparticle-surfactant-stabilized foam is superior to a surfactant-stabilized foam and causes lower core permeability damage than a gel surfactant-stabilized foam. It is recommended for use in hydraulic fracturing, particularly for fracturing stimulation in tight and shale gas reservoirs.