Self-suspension systems for fracturing technology has proved to provide great convenience when used in oilfield operation. However, most fracturing fluid systems contain mainly cationic surfactants, which can easily cause reservoir damage, solution residue, and poor temperature resistance. In the case of the cationic-surfactant fracturing system, the fluid sand carrying capacity is not high enough to change the formation pressure, and the failure of the self-suspension ability leads to a decline in well production capacity and other problems. In this paper, we have proposed an architecture model of a self-suspension solution containing nano-particles, including the model of nano-particle monolayer adsorption on the proppant surface and the three-dimensional network-structure model of nano-particle adsorption on micelles in the solution. The rheological properties, temperature resistance, viscoelasdcity, sand-suspending capacity, gel-breaking properties, and core damage of the modified solution are tested and evaluated. The viscosity and temperature resistance, enhanced sand suspension, and sand-carrying capacity are verified by field application experiments. The results show that the modified fluid system has obvious advantages over traditional fracturing fluid systems and can eliminate the shortcomings of conventional fracturing. The proposed nanoparticle self-suspension solution technology helps to overcome construction difficulties and to reduce engineering costs and environmental pollution, as well as to increase production of the oil wells. The experimental validation results prove that the proposed fluid system can be successfully applied in complex oilfield formations.

事实证明，用于压裂技术的自悬浮系统在油田作业中提供了极大的便利。但大多数压裂液体系以阳离子表面活性剂为主，易造成储层破坏、溶液残留、耐温性差等问题。在阳离子-表面活性剂压裂系统的情况下，流体带砂能力不足以改变地层压力，自悬浮能力失效导致井产能下降等问题。在本文中，我们提出了一种含有纳米颗粒的自悬浮溶液的架构模型，包括纳米颗粒在支撑剂表面的单层吸附模型和纳米颗粒在胶束上的吸附三维网络结构模型。在解决方案中。对改性溶液的流变性能、耐温性、粘弹性、悬砂能力、破胶性能和核心损伤进行了测试和评价。通过现场应用实验验证了其抗粘温性、增强的砂悬浮性和携砂能力。结果表明，改进后的流体体系相对于传统压裂液体系具有明显的优势，可以消除常规压裂的缺点。所提出的纳米颗粒自悬浮溶液技术有助于克服施工困难，降低工程成本和环境污染，以及提高油井的产量。实验验证结果证明所提出的流体系统可以成功地应用于复杂的油田地层。