In view of the fact that most of the filter media of existing plugging evaluation instruments use steel plates or steel balls, which cannot truly simulate the characteristics of the formation, a new type of TL-1 high ...In view of the fact that most of the filter media of existing plugging evaluation instruments use steel plates or steel balls, which cannot truly simulate the characteristics of the formation, a new type of TL-1 high temperature and high pressure plugging instrument has been developed. The filter medium of the instrument is the natural stone with different cracks and quartz sand beds with different particle sizes, which can better simulate the adsorption and hang-up effect of the formation on the plugging agent. It is possible to evaluate the plugging effect, pressure-bearing capacity and return pressure of the plugging slurry for different cracks and sand beds of different sizes under different temperatures and pressures. Using new and old instruments to evaluate the plugging effect of the same plugging slurry, it is found that the plugging effect is different from the distribution of the plugging material on the crack surface, the plugging effect and the pressure bearing capacity. The instrument is stable and reliable in operation and simple in operation. It is a new instrument for conducting research on anti-leakage plugging materials and anti-leakage plugging drilling fluid systems.展开更多
成品油管道顺序输送多种油品时,精准确定混油界面位置,是提升管道高质量运行的关键。通过在线监测系统在管道输送过程中在线采集管道中0^(#)柴油和-35^(#)柴油混油段近红外光谱,利用参数Logistic方程分析了混油光谱变化趋势,建立了0^(#...成品油管道顺序输送多种油品时,精准确定混油界面位置,是提升管道高质量运行的关键。通过在线监测系统在管道输送过程中在线采集管道中0^(#)柴油和-35^(#)柴油混油段近红外光谱,利用参数Logistic方程分析了混油光谱变化趋势,建立了0^(#)柴油和-35^(#)柴油混油冷滤点近红外偏最小二乘法(partial least squares,PLS)定量模型,预测了管输0^(#)柴油和-35^(#)柴油混油段的冷滤点。结果表明,混油输送过程近红外光谱变化趋势符合参数Logistic方程,顺序输送0^(#)柴油和-35^(#)柴油及其混油样本的冷滤点范围宽,近红外光谱与冷滤点呈明显非线性关系。通过分段建立PLS近红外定量模型,可准确预测混油过程冷滤点,冷滤点近红外值与实验室标准方法NB/SH/T 0248-2019柴油和民用取暖油冷滤点测定法测定值的偏差不大于3℃,不超过冷滤点标准方法NB/SH/T 0248-2019柴油和民用取暖油冷滤点测定法再现性误差。近红外光谱在线分析技术可实现在线监测0^(#)柴油和-35^(#)柴油混油过程冷滤点质量指标,用于判断成品油管道输送同种油品不同品号的油品界面,为混油过程油品切割提供参考与数据支持,减少人工检测工作量。展开更多
文摘In view of the fact that most of the filter media of existing plugging evaluation instruments use steel plates or steel balls, which cannot truly simulate the characteristics of the formation, a new type of TL-1 high temperature and high pressure plugging instrument has been developed. The filter medium of the instrument is the natural stone with different cracks and quartz sand beds with different particle sizes, which can better simulate the adsorption and hang-up effect of the formation on the plugging agent. It is possible to evaluate the plugging effect, pressure-bearing capacity and return pressure of the plugging slurry for different cracks and sand beds of different sizes under different temperatures and pressures. Using new and old instruments to evaluate the plugging effect of the same plugging slurry, it is found that the plugging effect is different from the distribution of the plugging material on the crack surface, the plugging effect and the pressure bearing capacity. The instrument is stable and reliable in operation and simple in operation. It is a new instrument for conducting research on anti-leakage plugging materials and anti-leakage plugging drilling fluid systems.
文摘成品油管道顺序输送多种油品时,精准确定混油界面位置,是提升管道高质量运行的关键。通过在线监测系统在管道输送过程中在线采集管道中0^(#)柴油和-35^(#)柴油混油段近红外光谱,利用参数Logistic方程分析了混油光谱变化趋势,建立了0^(#)柴油和-35^(#)柴油混油冷滤点近红外偏最小二乘法(partial least squares,PLS)定量模型,预测了管输0^(#)柴油和-35^(#)柴油混油段的冷滤点。结果表明,混油输送过程近红外光谱变化趋势符合参数Logistic方程,顺序输送0^(#)柴油和-35^(#)柴油及其混油样本的冷滤点范围宽,近红外光谱与冷滤点呈明显非线性关系。通过分段建立PLS近红外定量模型,可准确预测混油过程冷滤点,冷滤点近红外值与实验室标准方法NB/SH/T 0248-2019柴油和民用取暖油冷滤点测定法测定值的偏差不大于3℃,不超过冷滤点标准方法NB/SH/T 0248-2019柴油和民用取暖油冷滤点测定法再现性误差。近红外光谱在线分析技术可实现在线监测0^(#)柴油和-35^(#)柴油混油过程冷滤点质量指标,用于判断成品油管道输送同种油品不同品号的油品界面,为混油过程油品切割提供参考与数据支持,减少人工检测工作量。
