Влияние реологических свойств нефти на энергоэффективность работы нефтепровода

Abstract

Variations in the performance of process modes and the efficiency of major pump units due to a mismatch between the planned and actual values of oil’s rheological properties leads to a deviation in actual electrical consumption compared to the planned level. A reduction formula makes it possible to quickly identify such deviations in the mid- and long-term (over the course of a month/year), with factor analysis determining the causes thereof. Such analysis should be carried out on the basis of variations in the properties of the materials and changes to the efficiency of pumping units due to shifts in their operating point. The role of variation of geodetic elevations at the beginning and end of process sections of major pipelines in determining the impact of changes in oil properties on consumed electrical power is considered. It has been found that the shorter the section and the greater the difference in geodetic elevations, the lower the share of energy consumed due to the changes in oil viscosity as a proportion of the total energy consumption in the pumping process mode. The experimental results point to the need to expand the list of parameters for conducting factor analysis and lead to the conclusion that a correct determination of the causes of deviation in actual power consumption from the planned values is only possible after hydraulic calculations of the process modes of the pipeline operation have been made.