Research on the control of slack flow of China-Kazakhstan crude oil pipeline
DOI:
https://doi.org/10.21152/1750-9548.15.4.409Abstract
China-Kazakhstan pipeline is the first land import transnational crude oil pipeline in China. It is also the only long-distance crude oil channel connecting the resources in the west of Kazakhstan and the two refineries in the east of Kazakhstan and exports to China. It undertakes the dual responsibilities of crude oil supply of the two refineries in the east of Kazakhstan and the crude oil guarantee of refineries in Western China. At present, the annual throughput of China-Kazakhstan crude oil pipeline accounts for about 20% of China's onshore crude oil imports. Therefore, the pipeline’s safe, stable and efficient operation plays an important role in ensuring the strategic security of energy in Western China. Since the China-Kazakhstan crude oil pipeline has commissioned, it has been found that there is slack flow in the pipeline under different working conditions, which has a great impact on the safe and stable operation of the pipeline and the measurement accuracy of commercial trade. In this paper, the causes of slack flow in China-Kazakhstan crude oil pipeline are studied, the potential location of slack flow is analyzed, and the boundary conditions of slack flow condition are defined. At the same time, control strategies to avoid slack flow under different conditions are formulated by using simulation technology. The research results will provide direct technical case support for reasonable formulation of operation scheme of China-Kazakhstan crude oil pipeline system and terminal station inlet pressure control strategy, so as to ensure safe, stable and efficient operation of the pipeline.
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