具有井下自发电及自传感功能的随钻测量新方法研究——以用于振动测量的井下摩擦纳米发电机为例

Research on a new measurement while drilling method with downhole self‑powered and self‑sensing function--An example of triboelectric nanogenerator used in downhole vibration measurement

现有随钻测量系统的供电方式均有各自的适用条件,因此有必要探索新型的井下供电方式作为对现有方式的补充,或联合现有供电方式共同使用。摩擦纳米发电机源于接触起电及静电感应现象(即生活中常见的静电),具有发电机和传感器的双重功能。基于此,本文将摩擦纳米发电机原理引入地质勘探领域,提出了一种可用于井下自供电(也叫自发电)及自传感的随钻测量新方法,并以自供电式井下振动传感器的研制为例对该方法进行阐述,同时通过大量的试验验证了传感器的高信噪比及良好的发电特性,且进一步通过280℃范围内的高温测试表明了基于该方法具有研制超高温井下传感器及超高温井下实时发电机的优势。还指出了下一步的重点研究方向及其解决途径。

The existing power supply methods of measurement while drilling systems have their own applicable conditions,so it is necessary to explore new underground power supply methods as a supplement to the existing methods or use them in conjunction with th existing power supply methods.The triboelectric nanogenerator is derived from the phenomenon of contact electrification and electrostatic induction(ie,common static electricity in life),and has the dual functions of a generator and a sensor.Based on this,this study brings the triboelectric nanogenerators into the field of geological exploration,and proposes a new measurement while drilling method that with the function of self‑powered(also called self‑powered)and self‑sensing base on the principle of triboelectric nanogenerator,and uses a self‑powered downhole vibration sensor as an example to introduce this method in detail.Subsequent tests verified the high signal‑to‑noise ratio and good power generation characteristics of the sensor,and further high‑temperature tests in the range of 280℃showed that this method has obvious advantages in developing ultra‑high temperature downhole sensors and ultra‑high temperature downhole real‑time generators.In addition,since the current research of our team in this new field is still in infancy,there are still a lot of work to be carried out in detail,so this study also gives the next key research directions and solutions in order to provide some reference for interested researchers.