摘要
由于油基钻井液的流变性受温度的影响较明显,并且测定时温度的不统一、不精确,导致在室内研究中数据的重复值较差,无法进行统一化比对,为油基钻井液的研究探索带来困扰.为此,利用六速旋转黏度计通过测量不同密度(1.0～2.0 g/cm3)的油基钻井液在不同温度(20～80℃)下的旋转黏度计的600 r/min读数,并进行因素分析,结果表明:油基钻井液的黏度是导致油基钻井液黏度变化的最主要原因,且温度越高,单位温度变化范围内的黏度差越小,建议在要求精度较高的油基钻井液研究探索中,特别是在高密度/超高密度油基钻井液研究中,在保证安全的范围内,测量温度可尽量提高并保持一致.
Abstract
The rheology of oil-based drilling fluids is significantly affected by temperature,and the repeat-ability of data in indoor studies is poor in view of the inconsistent and inaccurate temperature during measure-ment,which makes it difficult to conduct unified comparisons and brings troubles to the research and explora-tion of oil-based drilling fluids.Hence,the six speed rotational viscometer is used to measure the 600 r/min readings of oil-based drilling fluids with different densities 1.0 g/cm3～2.0 g/cm3 at different temperatures 20℃～80℃.The factor analysis showed that the viscosity of oil-based drilling fluids is the main cause of vis-cosity changes.The higher the temperature is,the smaller the viscosity difference within the unit temperature change range is.It is recommended that in the exploration of high-precision oil-based drilling fluid research and in the high density/ultra high density oil-based drilling fluid research,the measurement temperature should be raised as much as possible and kept consistent within a safe range.
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