The inaccessibility of geological reservoirs, both for oil and gas production or geothermal usage, makes detection of reservoir properties and conditions a key problem in the field of reservoir engineering, including for the development of geothermal power plants. Herein, an approach is presented for the development of messenger nanoparticles for the determination of reservoir conditions, with a proof of concept example of temperature detection under controlled laboratory conditions. Silica particles are synthesized with a two-layer architecture, an inner enclosed core and an outer porous shell, each doped with a different fluorescent dye to create a dual emission system. Temperature detection happens by a threshold temperature-triggered irreversible release of the outer dye, thus changing the fluorescence signal of the particles. The reported particle system consequently enables a direct, reliable and fast way to determine reservoir temperature. It also displays a sharp threshold for accurate sensing and allows detection at concentration ranges as low as few nanograms of nanoparticles per milliliter.

无论是用于油气生产还是用于地热，地质储层都难以接近，这使得储层性质和条件的检测成为储层工程领域（包括地热发电厂的开发）中的关键问题。本文中，提出了一种开发用于确定储层条件的信使纳米粒子的方法，并提供了在受控实验室条件下进行温度检测的概念示例。二氧化硅颗粒是由两层结构合成的：内部封闭的核和外部多孔的壳，每个壳掺杂有不同的荧光染料以创建双发射系统。温度检测是通过阈值触发的不可逆的外部染料释放而发生的，从而改变了颗粒的荧光信号。因此，所报道的颗粒系统使得能够以直接，可靠和快速的方式确定储层温度。它还显示了用于精确感测的尖锐阈值，并允许在低至每毫升几纳克纳米颗粒的浓度范围内进行检测。