超高温高压流变仪的研发及应用

Development and application of the ultra high temperature and high pressure rheometer

随着我国能源勘探及地球深部探测等向深部发展,深井越来越多,地层温度、压力越来越高。保证高温高压状态下钻井液流变性能的稳定是深井安全钻进的必要前提,测定钻井液高温高压流变性是评价和优选钻井液体系最基础的工作。依托国家科技部重大仪器设备开发专项,通过对压力控制系统、温度控制系统、剪率控制系统、粘度检测系统等方面技术难题的攻关,研制成功了国内首台超高温高压流变仪。该仪器可在高温高压及低温高压条件下对钻井液、完井液、压裂液等样品的流变性进行高精度测量。

With the development of energy exploration and deep exploration in China,there are more and more deep wells,and the formation temperature and pressure are higher and higher.To ensure the stability of rheological properties of drilling fluid under high temperature and high pressure is a prerequisite for safe drilling in deep wells.The determination of rheological properties of drilling fluid under high temperature and high pressure is the most basic work for evaluation and optimization of the drilling fluid system.With the support of the national major equipment and instrument development project of the Ministry of Science and Technology of China,the first ultra high temperature and high pressure rheometer in China has been successfully developed by tackling the technical problems with the pressure control system,temperature control system,shear rate control system,viscosity detection system,etc.The instrument can measure the rheological properties of drilling fluid,completion fluid and fracturing fluid with high precision under high temperature and high pressure,as well as low temperature and high pressure.