Development of Viscocity Sencing Devise of Fluids in High Pressure and High Temperature

本文介绍了高压高温条件下粘度测量的原理，利用霍尔元件测量小磁性物体在测量液池中的下落时间来评价流体粘度。建立了流体粘度测量装置的样机，并对其进行了标定试验，以考察粘度测量的准确性。该方法已应用于稠油的粘度测量，适用于提高采收率项目的各种工况。对高压下溶解CO2气体的稠油、减压产生含CO2微泡的泡沫油、注汽制成的稠油乳状液等特定原油样品进行了测量，并对其粘度特性进行了实验研究。结果表明，该方法可用于各种原油粘度的测量。

In this study, the principle of the viscosity measurements for high pressure and high temperature has been presented by using Hall element that measures the falling time of the small magnetic object in the measuring fluid cell to evaluate fluid viscosity. A prototype of the device to measure fluid viscosity was constructed and its calibration tests were done to investigate the accuracy of viscosity measurements. It was applied to viscosity measurements of heavy oils in various conditions related to EOR projects. Particular crude oil samples, such as heavy oil dissolving CO2 gas under high pressure, foamy oil including CO2 micro-bubbles generated by depressurizing and heavy oil emulsion made by injecting steam, were measured and their viscosity characteristics were studied experimentally. Based on these results, it has been clarified that the present measurement method can be applied to measure the viscosity of various crude oils.